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JS | I 'm working on my new blog , for now the server side is NodeJS ( using expressjs ) , I host the server on my computer.For rapid development I 'm using GulpJS.Before I explain the weird thing . Let me say that both ports ( 3000 and 80 are open ) .Gulp version : 3.9.0NodeJS version : 0.10.35Browser-sync : 2.7.12This is ... | var express = require ( 'express ' ) ; var app = express ( ) ; app.use ( express.static ( 'public ' ) ) ; app.set ( 'base ' , '/public ' ) ; app.get ( '/ ' , function ( req , res ) { res.sendfile ( 'index.html ' ) ; } ) ; var server = app.listen ( 80 , function ( ) { var host = server.address ( ) .address ; var port = ... | Reflected client actions from a different computer |
JS | I want to : Is it possible ? | // Display loader spinner// Check if ID or Class exist in HTML Page// If ID or Class are found , load a specific css file// Display HTML PAGE | How can I load a specific css file in a specific case with JavaScript ? |
JS | I have a Javascript object defined as follows : I push to array scenario with : However I get 0 when : So of course I can not loop through the array content . If I do : I see the array content within Chrome plus the correct array length . I have similar code that defines and works with arrays , but outside of an object... | var active = { waypoints : [ ] , scenario : [ ] } var myScenario = { id : terrainId , text : text } ; active.scenario.push ( myScenario ) ; console.log ( active.scenario.length ) ; console.log ( active.scenario ) | Javascript length of array in object |
JS | I want to insert multiple data ( PHP CodeIgniter ) using array . but I still find an error . The error is array is not clearwhen I var_dump show the result likethe result is should be likewhat should I do ? How if like this ? but show an error | function insert ( ) { $ hitung=count ( $ _POST [ 'pembicara ' ] ) ; $ pengisi=implode ( ' , ' , $ _POST [ 'pembicara ' ] ) ; $ materi=implode ( ' , ' , $ _POST [ 'materi ' ] ) ; $ alasan=implode ( ' , ' , $ _POST [ 'alasan ' ] ) ; $ datapembicara = array ( 'id_kegiatan ' = > $ x , 'nama_pembicara ' = > $ pengisi , 'mat... | PHP into database with dynamic form with javascript ( codeigniter ) |
JS | I am using Angular 4 for my web template.HTML is generated once the HTTP get method is called inside the constructor , the response of which creates the HTML.The above works fine.I am also using jQuery with Angular and trying to initialize a function on this page.I have tried calling the above code inside various lifec... | $ ( function ( ) { Books.init ( ) ; } ) ; | How can I call a function in jQuery once HTML is completely rendered dynamically in Angular 4 ? |
JS | Here I found a pattern of javascript module enabling private members of object . If I got it right , it can be written this way : But there is more effective way : Is there any difference between those two ? Are there any other possibilities to implement private members ? This is the result from Chrome debugger : | var myObject1 = ( function ( ) { var privateMember = 42 ; return { publicMember : function ( ) { return privateMember ; } } } ) ( ) ; var myObject2 = new function ( ) { var privateMember = 42 ; this.publicMember = function ( ) { return privateMember ; } } | Technical differences in creating object with private member |
JS | Need to capitalize the first letter of each word in a sentence , my regex expression however is also capitalizing the 'm ' in I 'm . The full expression is this : The problem here ( I think ) is that \b\w will grab the first letter after a word boundary . I 'm assuming that single quotes denote a word boundary therefor... | / ( ? : ^\w| [ A-Z ] |\b\w ) /g | Capitalizing first letter of each word , \b\w also applies to I 'm |
JS | I am in the following situation : I have to check if the object parameter passed to a function is valid : Exmaple : Is there a better way to make this kind of check ? | function ( opt ) { if ( opt & & opt.key & & opt.key2 ) { // make something } } | I am looking for a smart way to check the object parameter passed to a function |
JS | LikeIf i want to get all id 's starting with 'box_ ' how can i do it something like this..Unfortunately wrapping the div 's wo n't work because it will get all the other divs in side and between the box divs.I guess i can give them all another class and reference it like that , but just wondering if there 's something ... | < div id= '' box_1 '' > < div id= '' box_2 '' > < div id= '' box_3 '' > $ ( `` # box_ '' + anything ) | Is it possible to get a selector using indexOf |
JS | I feel this should be answered somewhere in the internet but I failed to find it , maybe because I 'm not searching the correct terms but this is the problem : I have the following function : I was getting errors in succesFunction ( data , k , Parameters ) because ' k ' was always evaluated with the latest value . What... | function ParentFunction ( DataBase , Parameters ) { for ( k = 0 ; k < DataBase.length ; k++ ) { var CalendarURL = `` https : //www.google.com/calendar/feeds/ '' + DataBase.cid ; $ .ajax ( { url : CalendarURL , dataType : 'json ' , timeout : 3000 , success : function ( data ) { succesFunction ( data , k , Parameters ) ;... | Correct way to pass a variable argument in a callback in JavaScript ? |
JS | See the code below : I want to know why 2..toString ( ) can run without errors and what happens when it runs ? Can somebody explain it ? | 2.toString ( ) ; // error2..toString ( ) ; // `` 2 '' 2 ... toString ( ) ; // error | Javascript Function toString |
JS | I 'm trying to build a simple CMS where users can write anything in contenteditable div . When they 're saving their work I want to remove specific characters from the text they putted i.e . : The text is : I know how to remove the comma with jquery .text ( ) , but it just gives me a plain text without HTML tags . The ... | < ul > < li > This is the text inserted by < b > user < /b > and styled by him - there should be no comma at the end of a < b > < i > < u > LI element , < /u > < /i > < /b > < /li > < /ul > | Jquery - removing a character from HTML but leaving html tags unchanged |
JS | I 'm new with knockout.js and I do n't know how to do multiple mapping with my object.That 's my data from the server : I do a first mapping on the whole object and ko.computed some datas : After executing this , I get what I want for the first part : But now , I want to do the same thing with the contract array inside... | var persons = { 'value ' : [ { `` id '' : `` 1 '' , `` civility '' : `` Mr. '' , `` firstname '' : `` john '' , `` lastname '' : `` doe '' , `` phone '' : `` 00 00 00 00 00 '' , `` email '' : `` email @ email.com '' , `` contract '' : [ { `` id '' : `` 1 '' , `` gamme '' : `` Gamme 1 '' , `` formula '' : `` Formula 1 '... | knockout.js Multiple mapping in nested objects |
JS | I have a bivariate dataset with 100 observations . I used hexagon binning and ended up with 26 hexagon bins . In order to save the rows of the 100 observations that are in each of the 26 hexagon bins , I used the base : :attr function in R. In the code below , this is done at : I am trying to create an interactive R Pl... | attr ( hexdf , `` cID '' ) < - h @ cID library ( plotly ) library ( data.table ) library ( GGally ) library ( hexbin ) library ( htmlwidgets ) set.seed ( 1 ) bindata < - data.frame ( ID = paste0 ( `` ID '' ,1:100 ) , A=rnorm ( 100 ) , B=rnorm ( 100 ) ) bindata $ ID < - as.character ( bindata $ ID ) x = bindata [ , c ( ... | Retrieving R object attributes in JavaScript |
JS | I have a jQuery statement like this ; I want to change this into a single statement and I wrote ; But ab is not hiding . How can I combine the 3 hide ( ) statements into one ? | var current = $ ( this ) ; current.hide ( ) ; current.siblings ( '.ab ' ) .hide ( ) ; current.siblings ( '.cd ' ) .hide ( ) ; $ ( current , current.siblings ( '.ab ' ) , current.siblings ( '.cd ' ) ) .hide ( ) ; | How can I combine these jQuery statements ? |
JS | This is a strange issue I 'm facing . When I pass some big numbers to JS functions ( custom or built-in ) the value is automatically getting incremented by 1 . For example , see this : in the alert I 'm seeing 10466511635124472 , instead of 10466511635124471 . Can someone explain this behavior ? I have checked this in ... | < ! DOCTYPE html > < html > < body > < p > Click the button to display an alert box. < /p > < button onclick= '' myFunction ( ) '' > Try it < /button > < script > function myFunction ( ) { alert ( 10466511635124471 ) ; } < /script > < /body > < /html > | Issue with some big numbers in Java Script |
JS | I want to do event delegation and capture all events happening on a DOM object by an event handler bound to the entire document . Is there any difference between binding the events to window as in : and window.document as in the following ? event is some kind of event like 'click ' , 'mouseover ' , etc . | window.addEventListener ( event , function ( e ) { var obj = e.target ; ... // if ` obj ` is a certain kind of object , then do something } , false ) ; window.document.addEventListener ( event , function ( e ) { var obj = e.target ; ... // if ` obj ` is a certain kind of object , then do something } , false ) ; | Event delegation and window versus window.document |
JS | I 'm trying to push a value to an array , but this adds the value to both arrays a and b . How can I make sure that the b array is not modified ? | var a= [ [ 1 ] ] ; var b= [ 2 ] ; document.getElementById ( `` 1 '' ) .innerHTML= '' a [ 1 ] `` +a [ 1 ] ; document.getElementById ( `` 2 '' ) .innerHTML= '' b `` +b ; a.push ( b ) ; document.getElementById ( `` 3 '' ) .innerHTML= '' a [ 1 ] `` +a [ 1 ] ; document.getElementById ( `` 4 '' ) .innerHTML= '' b `` +b ; a [... | Why does `` a.push ( b ) '' change `` b '' in my example code ? |
JS | I 'm having a trouble to get an array with numbers from 1 to 16 randomly without repetition.I made num array to put numbers from createNum function.The createNum function has a for loop which gets numbers from 1 to 16 until if statement push 16 numbers into num array.At the end , I run createNum ( ) and display numbers... | let num = [ ] ; function createNum ( ) { for ( i = 0 ; i < = 15 ; ) { let numGen = Math.floor ( Math.random ( ) * 15 ) + 1 ; if ( ! num.includes ( numGen ) ) { num.push ( numGen ) ; i++ ; } ; } ; } console.log ( createNum ( ) ) ; document.getElementById ( `` selectedNumbersShownHere '' ) .innerHTML = num ; console.log ... | Simple for loop does not seem work properly |
JS | I 've came into a problem where I have to re-type / re-define repeating types in my store / view / components files i.e . Think a view that takes in some store value and has a function that alters that value and this function is passed down to a component.There is a lot of type re-usability happening here and I went on... | // @ flowimport React , { Component } import OtherComponent from `` ./OtherComponent '' export type MyComponentProps = { something : string } export type MyComponentState = { something2 : boolean } export type MyComponentActions = { check : ( something2 : $ PropertyType < MyComponentState , 'something2 ' > , something ... | Structuring react project with flow type for best type reusability |
JS | I am having trouble getting the errorCount property to increase during code execution . The problem I am having is occurring inside of the $ .ajax request , more specifically the addError ( ) method . If I use the following code below to check the current count of errorCount it always returns 0 even though I have manua... | var boom = new test ( settings , formData , search ) ; console.log ( boom.errorCount ) ; boom.queueCalls ( settings ) ; console.log ( boom ) ; console.log ( boom.errorCount ) ; function test ( a , b , c ) { this.settings = a ; this.formData = b ; this.search = c ; this.errorCount = 0 ; } test.prototype = { constructor ... | Javascript object counter not incrementing as expected |
JS | Here is an array example I have : I want this result : It means , separate from this ' > 'No duplicateThis is an example of where I 'm at but it just removes the arrow ' > ' jsfiddle | var array= [ 'business > management ' , 'News > Entertainment News ' , 'business > Entrepreneurship ' ] ; [ 'business ' , 'management ' , 'News ' , 'Entertainment News ' , 'Entrepreneurship ' ] | Modify and manipulate JavaScript array |
JS | So far I 've got this code http : //jsfiddle.net/Nq79H/1/but I want to fadeout the image in order to leave only the text visible.Do I need to change the javascript or write a new css div ? | $ ( '.text ' ) .hide ( ) .removeClass ( 'text ' ) .addClass ( 'text-js ' ) ; $ ( '.thumb ' ) .hover ( function ( ) { $ ( this ) .find ( '.text-js ' ) .fadeToggle ( ) ; } ) ; | Opacity on a div hover |
JS | I have a react component that maps through an array.Each array item has an optional ID type.If I have this ID , I will render an element , otherwise nothing.This element has an onClick that calls a function accepts the ID as param.Even though I check if I have the ID , TypeScript still complains that the ID might be un... | // fake bindingsdeclare namespace React { function createElement ( ) : any ; } // This type has an optional proptype SampleType = { id ? : string ; name : string ; } const sampleArray : SampleType [ ] = [ { id : 'test ' , name : 'Adrian ' } , { name : 'Florescu ' } ] function sampleFunction ( id : string ) { console.lo... | TypeScript/JSX Type Assertion works only outside JSX |
JS | I could n't find an exact match on my issue , though many javascript scoping questions do exist . Here is my current code for the question.When I run this , I am alerted with `` blank '' and then `` one '' as expected . However , if I uncomment that one line , so it looks like this.I am alerted with `` blank '' and the... | var my_var = `` blank '' ; var MyFunc = function ( ) { my_var = `` one '' ; //var my_var = `` two '' ; } alert ( my_var ) ; MyFunc ( ) ; alert ( my_var ) ; var my_var = `` blank '' ; var MyFunc = function ( ) { my_var = `` one '' ; var my_var = `` two '' ; } alert ( my_var ) ; MyFunc ( ) ; alert ( my_var ) ; | Javascript Scoping Confusion |
JS | I have structure like : appscriptslibsjquery.jsbootstrap.jsmoment.jsapp.jsvendor.jscommon.jsapp.config.jsmain.js # require configNote vendor.js is just a file that includes all files under libs . Ex//vendor.jsdefine ( [ 'jquery ' , 'bootstrap ' , 'moment ' ] , function ( ) { } ) ; Just to list out the dependencies : ap... | module.exports = function ( grunt ) { 'use strict ' ; var config = { dist : { options : { appDir : 'app/ ' , baseUrl : './scripts ' , mainConfigFile : 'app/scripts/main.js ' , dir : 'dist/scripts/ ' , modules : [ { name : 'vendor ' } , { name : 'app ' , exclude : [ 'vendor ' ] } ] } } } ; grunt.config ( 'requirejs ' , ... | Grunt require fails to create multiple modules as expected |
JS | I 'm using typeahead.js to create a simple dropdown list . The user should be able to use the down key to scroll through suggestions , and be able to use the mouse to select a suggestion . The suggestions should be appropriately highlighted in either of these scenarios.The problem I 'm having is achieving the above wit... | .tt-suggestion : hover { color : # f0f0f0 ; background-color : # 0097cf ; } .tt-cursor { color : # f0f0f0 ; background-color : # 0097cf ; } | CSS : Target an element on hover OR focus , but not both |
JS | I have seen a few similar to what I am looking for but not exactly the same.So what I am trying to do is move elements from within one parent div to another but only once the user has scrolled a certain amount down the page . So once the user has reached a point on the page the elements will then move to another and th... | $ ( document ) .scroll ( function ( ) { var y = $ ( this ) .scrollTop ( ) ; if ( y > 600 ) { $ ( ' # Top ' ) .fadeIn ( ) ; } else { $ ( ' # Top ' ) .fadeOut ( ) ; } } ) ; # Top { display : none ; position : fixed ; top : 0 ; left : 0 ; width : 100 % ; border-bottom : 2px solid # f2f2f2 ; border-radius : 0 ; background-... | Move Div element from one to another when page scrolled |
JS | An AngularJS app needs to re-use multiple custom objects . I am concerned about creating cluttered , redundant code that is hard to maintain , so I moved re-usable code to a service that can be concisely injected in the controller for each view and then called directly from each html view without cluttering the control... | angular.module ( 'someclass ' , [ 'ngCookies ' ] ) .service ( 'someclass ' , [ ' $ rootScope ' , ' $ http ' , ' $ cookies ' , function ( $ rootScope , $ http , $ cookies ) { this.prop1 = $ cookies.get ( 'test1 ' ) ; this.prop2 = 'nothing ' ; this.resultphone = { } ; this.method1 = function ( isValid , resultphone ) { i... | Why ca n't AngularJS view send data to this re-usable service ? |
JS | I have a line in the form of an array of coordinate points : The points which make up the line are at varying distances from one another.My goal is to make a function which takes this line and split it up into evenly separated distances.All I 'm looking for is the terminology for this process ... Interpolation ? becaus... | [ { x1 , y1 } , [ x2 , y2 ] , ect ... ] | Is there a name for `` Breaking up a line at regular intervals '' ? |
JS | I noticed that the async keyword can be assigned any value whatsoever and even used as a normal variable : Yet , even then it continues to operate as before : Even await is doing the same thing : What is going on here ? Why are the keywords usable as a variables ? | let async = `` world '' ; console.log ( async ) console.log ( `` Hello `` + async ) let async = `` world '' ; async function foo ( input ) { return input ; } let barPromise = foo ( `` bar '' ) ; console.log ( `` bar promise is : '' , typeof barPromise ) ; console.log ( `` bar promise also has a .then : '' , typeof barP... | Why can the ` async ` and ` await ` keywords be assigned to ? |
JS | I have some element in body . I want to know their indexing like div indexing should be 1 and span its indexing should be 2 . How to start find | $ ( function ( ) { var id= document.getElementsByTagName ( '* ' ) ; for ( i=0 ; i < id.length ; i++ ) { alert ( id [ i ] ) } } ) < body > < div > < /div > < span > < /span > < p > < /p > < strong > < /strong > < /body > | How to get element indexing using javascript |
JS | I always wondered why js compressors do n't do this . Let 's say I have a minified script like this : Why does n't it compile to something like this : Meaning changing every occurrence of a .property with a [ minified key ] and pass a string and arg receiver to the iife ( basically what I did above with the .length ) I... | ( function ( $ ) { var a= $ ( `` a '' ) ; 1 < a.length & & 10 > a.length ? alert ( a.length ) : alert ( $ ( `` p '' ) .length ) } ) ( jQuery ) ; ( function ( $ , L ) { var a= $ ( `` a '' ) ; 1 < a [ L ] & & 10 > a [ L ] ? alert ( a [ L ] ) : alert ( $ ( `` p '' ) [ L ] ) } ) ( jQuery , 'length ' ) ; ( function ( $ , L ... | Why do n't js compressors do this ? |
JS | I am trying an animation on the two divs on button click . Here is the demo i have created js fiddle . what i want is when the user will click on the button the right div will slide to right ( it will hide ) . and the width of left div will become 100 % .on second time when user will click the right div will visible fr... | < div class= '' col-md-12 '' > < div id= '' tags-left '' class= '' col-md-6 '' > div left < /div > < /div > < div id= '' tag-div '' class= '' col-md-6 '' > div right < /div > < /div > < div class= '' col-md-12 '' > < div class= '' btn-main '' > < input id= '' show-tag '' type= '' button '' class= '' save-btn '' value= ... | animation is not working as expected |
JS | If you run this code in Firefox and Chrome , it will output a different converted string.In Firefox it will return a value of `` 0.4fxcm49g2j8 '' In Chrome or Node 4+ ( likely a V8 difference ) , I get a value of `` 0.4fxcm49g2j91m31w5nq6ldte29 '' .In IE and Edge it is `` 0.4fxcm49g2j91 '' ( thanks @ JaromandaX ) Anyon... | ( 0.1234 ) .toString ( 36 ) | Why does using toString ( ) on a float give different results in Firefox vs Chrome vs IE ? |
JS | Is the following code valid ? It seems that many javascript minifiers ( including jsmin at http : //jscompress.com/ ) consider the `` // '' on the second line to be the start of a comment . I assume it 's a bug in the `` trivially '' implemented minifiers , since all the browser implementations I tried run it without a... | function test ( ) { return /\//.exec ( `` \/ '' ) ; } alert ( test ( ) ) ; | Is `` \/ '' valid inside a javascript regex ? |
JS | Recently I investigated a situation in which a programmer inadvertently passed undefined into addEventListener , thus : No error was thrown . It 's as if JavaScript is willing to invoke undefined . But what in the world is undefined ( ) ? I have tried all sorts of things , e.g . : but I never get anything back.Edit add... | window.addEventListener ( 'load ' , undefined ) ; console.log ( undefined ( ) === null ) ; console.log ( typeof undefined ( ) ) ; | Can not determine type of undefined ( ) |
JS | How could a JavaScript RegEx be written , so that it matches for example the word cube , but only if the word small is not present in the 20 character range before this word.RegEx should match : cubered cubewooden cubesmall ... ... ... ... ... .cubeRegEx should not match : small cubesmall red cubesmall wooden cube ... ... | > var regex = / ( ? : ( ? ! small ) . ) { 20 } cube/im ; undefined > regex.test ( `` small ... ... ... ... ... .cube '' ) // as expectedtrue > regex.test ( `` ... ... ... .small ... ... cube '' ) // as expectedfalse > regex.test ( `` 01234567890123456789cube '' ) // as expectedtrue > regex.test ( `` 0123456789012345678... | RegEx that matches a word that NOT succeeds another one |
JS | Not sure if this is a bug or a feature . When parsing html with table elements outside a table , jQuery ignores non-table elements.passed into $ ( html ) becomesWhen passing the same html into plain javascript element.innerHTML = html becomesHere it is in action https : //codepen.io/addbrick/pen/mprBgPEDIT : Right afte... | < tr > < td > table data < /td > < /tr > < div > div after will be ignored < /div > < tr > < td > table data < /td > < /tr > table data < div > div after will be ignored < /div > | When parsing , jQuery ignores anything that is n't a table and document removes the table tag |
JS | I encountered this snippet ( event handling ) from the jQuery source code : Can someone explain this to me ? How does the this.bind ( name , fn ) ; work the same as element.addEventListener ( 'event ' , 'callback ( ) ' ) ? I know the basics of javascript , but I do not know the more advanced parts of JavaScript . Since... | var events = [ 'click ' , 'focus ' , 'blur ' , … ] ; jQuery.each ( event , function ( i , name ) { jQuery.prototype [ name ] = function ( fn ) { return this.bind ( name , fn ) ; } ; } ) ; | Can someone explain this code using the .bind ( ) function to me ? |
JS | I am trying to get some jQuery working on an offline page . The site 's app uses EmberJS , RequireJS , and who knows what else , but the bottom line is I am trying to replace this cryptic code with plain jQuery.Here is some HTML that should respond to interaction : Loading interaction ... RevealContent Some question So... | define ( `` site/mixins/interactions/reveal_content '' , [ `` exports '' , `` jquery '' ] , function ( exports , _jquery ) { function RevealContent ( $ el ) { this.el = $ el ; this.interactionData = $ el.find ( `` .interaction_data '' ) ; this.container = $ el.find ( `` .interaction_content '' ) ; } RevealContent.proto... | Any idea what ( 0 , _jquery [ `` default '' ] ) means in terms of jQuery selector or function ? |
JS | Of course , most of the time , I can simply search for the identifier and look at all instances thereof . Often , searching for `` = '' or `` : '' will find the answer the fastest.But this technique fails is situations like this : Let 's say I have n't discovered the above code yet . As illustrated in this example , so... | // untested javascript : function AddMemberToObject ( object , value , memberName ) { object [ memberName ] = value ; } var myObj = { } // 3,000 references to myObj// ... somewhere elsevar mysteryString = thisMethodCallsAnotherMethodCallsAnotherMethodEtc ( ) ; AddMemberToObject ( myObj , someFunction , mysteryString ) ... | How can I find where an object member is defined in Javascript ? |
JS | I am wondering if there is any cleaner way of injecting into a provider . As I am doing it now , I have to have http = null , and then set http = $ http in $ get so that I am able to use it in my functions . Below is my code for the providerCoffeeScript : JavaScript : | do - > githubProvider = ( ) - > http = null getUser = ( username ) - > return http.get ( `` https : //api.github.com/users/ '' + username ) .then ( response ) - > return response.data getRepos = ( user ) - > return http.get ( user.repos_url ) .then ( response ) - > return response.data getRepoDetails = ( username , rep... | Dependency Injection into Angular Provider |
JS | So I 'm trying to follow a Tutorial to implement a Solar System by using THREE.js but however I 'm getting the following error : Can not read property 'appendChild ' of undefinedThis is my current code : The error is occurring at line 49 . I 've tried moving it into my on load function but that just creates even more e... | < html > < head > < meta charset = '' utf8 '' > < title > Solar System Project < /title > < script src = `` three.min.js '' > < /script > < /head > < body > < script > // Standard Variables / To be changed later . var scene , camera , render , container ; var W , H ; // On load function ... window.onload = function ( )... | 'appendChild ' of undefined |
JS | I recently started using react and I tend to define default values like this : instead of : What disadvantages does this approach have in contrast to using defaultProps ? | class TextInput extends Component { render ( ) { return ( < input type= '' text '' name= { this.props.inputName || 'inputName ' } style= { this.props.inputStyle || { } } className= { this.props.inputClass || `` } / > ) ; } } class TextInput extends Component { render ( ) { return ( < input type= '' text '' name= { this... | defaultProps vs logical OR |
JS | This code runs for infinity , why ? if n ! =2 the function should do nothingand if n equals 2 the function calls f ( 0 ) and f ( 1 ) so it should stop after thatbut you only get infinite loop when you run it.any one could tell why ? edit : there is nothing outside the function.and no need for better code.Just asking wh... | function f ( n ) { i=0 ; if ( n==2 ) { while ( i < 2 ) { f ( i ) ; i++ ; } } } | Unexpected infinite loop |
JS | I have one controller I think of as my 'root ' controller , it is the one declared with an ng-controller attribute , then a few other controllers that are instantiated dynamically via a $ routeProvider . I want to declare a function that will be available via an ng-click attribute in scope of any of the dynamic/child c... | $ scope.announce = function ( ) { alert ( $ scope.specificName ) ; } | Access the 'current ' scope from a 'root ' controller |
JS | I just started Angular last week and I am struggling to access DOM from a template thats just loaded . Here 's whats happening - index.htmltemplates/top.htmlapp.jsI am not able to access dynamic elements from top.html which gets loaded in DOM later on using ng-repeat . Please let me know how to resolve this . Thanks ! ... | < div class= '' template '' ng-app= '' myApp '' ng-controller= '' myController '' > < div ng-include= '' template_url '' > < /div > < input type= '' button '' value= '' Load Top '' ng-click= '' loadTopTemplate ( ) '' > < /div > < ul > < li ng-repeat= '' ( key , myObjectItem ) in myObject '' > < span id= '' { { key } } ... | Angular - Access DOM Element From Just Loaded Template |
JS | I am working on a problem where I have to group an array of objects from one form into another.An example is better than 1000 words : And the new object should look like this : I have to find unique houses with all their rooms and also to add each price from initial object inside room.I 'm wondering which would be the ... | var initialData = [ { house : { id : 1 , text : `` white '' } , room : { id : 1 , text : `` red '' } , price : 2.1 } , { house : { id : 1 , text : `` white '' } , room : { id : 2 , text : `` blue '' } , price : 3.1 } , { house : { id : 1 , text : `` white '' } , room : { id : 3 , text : `` red '' } , price : 5.8 } , { ... | Javascript object reorganization with performance |
JS | Consider this snippet : which can also be written like this : If you run any of the given two codes , you 'll face this error : My question is why ? Before answering my question , please consider my argument : I understand the concept of recursion and how it leads to a stack overflow if there 's no stopping condition .... | function f ( ) { return new Promise ( ( resolve , reject ) = > { f ( ) .then ( ( ) = > { resolve ( ) ; } ) ; } ) ; } f ( ) ; async function f ( ) { return await f ( ) ; } f ( ) ; ( node:23197 ) UnhandledPromiseRejectionWarning : RangeError : Maximum call stack size exceeded while ( 1 ) { } function f ( ) { return new P... | Why recursive async functions in Javascript lead to stack overflow ? |
JS | I know that using an underscore is just a convention to define private variables in JavaScript . But I came across a use case [ while using a class ] where use of _ seems mandatory to make the code work ! My question is how _ is used under the hood by get and set.The below code throws an error : RangeError : Maximum ca... | class User { constructor ( name ) { this.name = name ; } get name ( ) { return this.name ; } set name ( val ) { this.name = val ; } } let user = new User ( `` Jhon '' ) ; console.log ( user.name ) ; class User { constructor ( name ) { this.name = name ; } get name ( ) { return this._name ; // Added `` _ '' here } set n... | Why do developers use `` _ '' while using get and set in JavaScript ? |
JS | i have a component which contains a component that is being render based on an if statement . the statement if false adds a css class to the container component , and not render the inner component and if true otherwise.the class is being added or not added in the right way . The inner component on the other hand is no... | < React.Fragment > < div className= { containerClasses } > < div className= '' conditions-types '' > < TableHeaderCell title= { texts.bookingReferenceInformation1 } / > { isTrue ( displayFlightBookingReference ) & & < TableHeaderCell title= { texts.bookingReferenceInformation2 } / > } { isTrue ( displayBookingDate ) & ... | jest/react - component is n't show in the snapshot |
JS | The first question I was asked in the interview , and to be honest I saw myself really confused and shown the door , Consider the snippets : Case a : Case b : As per my understanding , Function must be in the prototypical chain of ins ? | var sayHello = new Function ( `` alert ( 'Hello there ' ) ; '' ) ; alert ( sayHello instanceof Function ) ; // true alert ( sayHello instanceof Object ) ; // true , since every // object inherits from Object var myFunction = function ( ) { } var ins = new myFunction ( ) ; alert ( ins instanceof myFunction ) ; // ofcour... | instanceof in case of Function in JavaScript |
JS | I 'm trying to have the selected options value pass when I click the Add Another Worker button and have the pre selected= '' selected '' option removed and placed on the new selected option.JQueryHTML Here is a link to my jsfiddle https : //jsfiddle.net/jxqyn4rg/ | $ ( document ) .ready ( function ( ) { $ ( '.worker ' ) .on ( 'click ' , function ( e ) { e.preventDefault ( ) ; e.stopPropagation ( ) ; var title = $ ( '.title ' ) .val ( ) ; var worker = ' < select name= '' title [ ] '' class= '' title '' > < option value= '' Select a Title '' selected= '' selected '' > Select a Titl... | How to pass and remove a selected options value |
JS | This is my object literal : How can I addto obj ? | var obj = { key1 : value1 } ; { key1 : value1 , value2 , value3 } | Adding data to a JavaScript object literal |
JS | I ’ m working in a web project and I decide to turn in MVC 4 from ASP.NET.After many issues which I face it , I ’ m in a position to handle the events raised from the program.In my previous environment ASPX.NET I was double clicked on a < asp : Button ... / > control and automatically in the code behind I see the relat... | ValidationSummary.ValidationGroup The view at '~ / Views / Home / Index.aspx ' must derive from ViewPage < script type= '' text/javascript '' > function logSubmit ( ) { var url = 'loginSubmit ' ; $ .ajax ( { type : 'GET ' , url : url , dataType : 'json ' , } ) ; } < /script > Public Function loginSubmit ( ) As JsonResu... | page.aspx and code behind ( page.aspx.vb ) relations problems |
JS | While checking source code of a page I saw the JS code uglified as seen here : http : //jsfiddle.net/3jxzpxgv/show/Do you guys have any idea which tool is used ? I do n't think this is UglifyJS , Closure or YUI . | eval ( ( function ( D28 ) { for ( var J28= '' '' , p28=0 , C28=function ( D28 , y28 ) { for ( var L28=0 , E28=0 ; E28=32 & & t28 < =127 ) { L28+=t28-32 ; } } return L28 ; } ; p28 ( ( 0x50,48. ) > ( 54.0E1,99. ) ? 2:1.3860E3 < = ( 27.,0xA9 ) ? ( 1.95E2,0x229 ) :13.98E2 < ( 126,0x240 ) ? 2 : ( 0x1B2,0x19F ) > ( 0x9F,105 ... | Which tool used to uglify this piece of code ? |
JS | I will start with an apology about my poor English . I will try to be as clear as I can . : ) I have a 3-dimensional array ( just an array of 2-dimensional arrays ) . My goal is to take one of the 2-dimensional arrays , and rotate it 90° counterclockwise . It look like this : I try to make it `` rotate '' like this : I... | [ 1|2|3 ] [ 4|5|6 ] [ 7|8|9 ] [ 3|6|9 ] [ 2|5|8 ] [ 1|4|7 ] var temp = [ ] ; var cube = [ [ [ ' A ' , ' A ' , ' A ' ] , [ ' A ' , ' A ' , ' A ' ] , [ ' A ' , ' A ' , ' A ' ] ] , [ [ ' B ' , ' B ' , ' B ' ] , [ ' B ' , ' B ' , ' B ' ] , [ ' B ' , ' B ' , ' B ' ] ] , [ [ ' C ' , ' C ' , ' C ' ] , [ ' C ' , ' C ' , ' C ' ... | Create a duplicate of an array and manipulate the original |
JS | I want to extend Promise and change the then signature so its callback receives two values . I tried different approaches two of which are documented and tested here . Sadly , I get various errors or the resulting class does not behave like a Promise.Approach 1 : Wrapping a native PromiseApproach 2 : Extending native P... | export class MyWrappedPromise { constructor ( data ) { this.data = data ; this.promise = new Promise ( evaluate.bind ( data ) ) ; } then ( callback ) { this.promise.then ( ( ) = > callback ( this.data , ADDITIONAL_DATA ) ) ; } catch ( callback ) { this.promise.catch ( callback ) ; } } export class MyExtendedPromise ext... | Extending ` Promise ` and change ` then ` signature |
JS | For the below code snippet , i would like to understand how NodeJS runtime handles things :1st approach : longRunningTask ( ) function will block the main thread , as expected.2nd approach : In longRunningTaskProm ( ) wrapping the same code in a Promise , was expecting execution will move away from main thread and run ... | const billion = 1000000000 ; function longRunningTask ( ) { let i = 0 ; while ( i < = billion ) i++ ; console.log ( ` Billion loops done. ` ) ; } function longRunningTaskProm ( ) { return new Promise ( ( resolve , reject ) = > { let i = 0 ; while ( i < = billion ) i++ ; resolve ( ` Billion loops done : with promise. ` ... | Difference between returning new Promise and Promise.resolve |
JS | RxJs version 5.5 introduced the pipe operator to make it easier to combine RxJs operators and to make tree shaking more efficient for these situations . My question is , should you use the pipe operator if you only intend to use one operator ? Consider the following examples : vsIn situations such as this where you onl... | someObservable.map ( mappingLogicMethod ) .subscribe ( x = > console.log ( x ) ) ; someObservable.pipe ( map ( mappingLogicMethod ) ) .subscribe ( x = > console.log ( x ) ) ; | Should I use the pipe operator if I only use one operator ? |
JS | How can I made new array from firsts elements of arrays from this array ? and I want it to be My attempt : | [ [ `` 1 '' ,2 ] , [ `` 3 '' ,2 ] , [ `` 6 '' ,2 ] ] [ ' 1 ' , ' 3 ' , ' 6 ' ] var newArray = [ ] for ( i = 0 ; i < arrayToCompare.length - 1 ; i++ ) { newArray.push ( arrayToCompare [ [ 0 ] ] ) } | How can I made new array from firsts elements of arrays from an array |
JS | I have tried two versionThe first one autoplay is working on Google Chrome but how can I control with button that I can play or pause the audio ? The second one autoplay is not working on Google Chrome but I can control it with button in IE or FireFoxThe buttonsAnd the JavascriptSo how can I deal with this problem ? I ... | < embed name= '' pop '' src= '' pop.mp3 '' loop= '' true '' hidden= '' true '' autostart= '' true '' > < audio id= '' myAudio '' > < source src= '' pop.mp3 '' type= '' audio/mp3 '' > < /audio > < button onclick= '' playAud ( ) '' type= '' button '' > Play < /button > < button onclick= '' pauseAud ( ) '' type= '' button... | How can I control background music with button ? |
JS | I have the following code in JSfiddle.But when I paste the same exact code inside Chrome console , the function five ( ) prints 5 . Why ? | var a = 1 ; function five ( ) { this.a = 5 ; console.log ( a ) ; //JSfiddle prints the value 1 } five ( ) | Why do JSfiddle and Chrome console return different values of the same function ? |
JS | I have a bunch of arrays in this form : Lets say I would like to sort the first row ascending by val , so it becomes : Is there an easy way to sort the remaining arrays , so that their order matches the idx-order of the sorted first row ? Maybe this is even possible without the idx property ? | var myRows = [ [ { idx : 0 , val : 90 } , { idx : 1 , val : 75 } , { idx : 2 , val : 35 } ] , [ { idx : 0 , val : 50 } , { idx : 1 , val : 17 } , { idx : 2 , val : 95 } ] , [ { idx : 0 , val : 10 } , { idx : 1 , val : 24 } , { idx : 2 , val : 80 } ] // ... ] ; [ { idx : 2 , val : 35 } , { idx : 1 , val : 75 } , { idx :... | Sort other arrays by order of specific array ? |
JS | I do n't know if SO is the right place for such a question.I know a bit Promises , and I use them in a Node/Express environment to 'fix ' the asynchronous behavior of Node when querying database ( = Wait for DB answer , then do something ) .However , the more I use them , the less I know when not use them.For example ,... | ... . for ( var i = 0 ; i < rows.length ; i++ ) { // loop over a CSV file by line var cell = rows [ i ] .split ( / ; / ) var origin = cell [ 1 ] var destination = cell [ 2 ] var id = cell [ 0 ] Promise.all ( [ origin , destination , id ] ) .then ( ( p ) = > { } ... | Using 'Promise ' vs. NOT using 'Promise ' : in which cases ? |
JS | How comeproduces SyntaxError : Unexpected token ( whilealerts `` test123 '' ? | function ( ) { alert ( `` test123 '' ) ; } ( ) ! function ( ) { alert ( `` test123 '' ) ; } ( ) | anonymous javascript function call ! function vs function |
JS | I have a bunch of JSON string returned from an ajax call in a specific format and when starting to convert them all into my own Javascript object , I start to wonder if there is any easier way since we 're talking Javascript here.I 'll have var manyOfThem = [ { name : ' a ' } , { name : ' b ' } , { name : ' c ' } ] ; A... | myClass.prototype.doSomething = function ( ) { // do something to this.name } ; $ .each ( manyOfThem , function ( index , item ) { item.doSomething ( ) ; } ) ; var myClass = function ( item ) { this.name = item.name ; // do the same for the rest of item 's potentially 20 properties } ; var oneOfThem = new myClass ( man... | Javascript turning JSON string into instance of function |
JS | When I execute the following code , it behaves like I expect ( logs the contents of the DIV element ) : What I ca n't understand is why the following code does NOT work : They seem the same , so why does the DIV selector work when the FORM selector does not ? | var html = ' < form action= '' / '' method= '' get '' name= '' myform '' > < div > 123 < /div > < /form > ' ; console.log ( $ ( 'div ' , html ) ) ; var html = ' < form action= '' / '' method= '' get '' name= '' myform '' > < div > 123 < /div > < /form > ' ; console.log ( $ ( 'form ' , html ) ) ; | Form selector not work working on dynamic markup |
JS | I have search page in my NextJS application . URL example - /search ? q=Naaarutoo . And for example after reloading I just want to set `` Naaarutoo '' as the input value ( I know how to set query param to input value ) IMMEDIATELY . If we look closer we will see that field did n't fulfilled : I think this is because th... | import React from 'react'import { Formik , Form , Field } from 'formik'const Search = ( { router : { query } } ) = > ( < Formik enableReinitialize onSubmit= { ( ) = > { } } initialValues= { { q : query.q || `` } } render= { ( ) = > ( < Form > < Field name= ' q ' type= '' search '' placeholder= '' Find something '' / > ... | Fill the field immediately after reloading the page |
JS | Looking between the very first line of code in Bootstrap 's minified and unminified JS file , there is an immediate discrepancy : vs. ( See for yourself : bootstrap.js and bootstrap.min.js ) I 'm confused why this is allowed . My ( perhaps naïve ) understanding is that === is always a performance gain , and often preve... | // bootstrap.jsif ( typeof jQuery === 'undefined ' ) { ... } // bootstrap.min.jsif ( `` undefined '' ==typeof jQuery ) ... | Why do Javascript minifiers convert === to == ? |
JS | Why is the `` instanceof '' result not `` false '' , because the `` constructor '' does n't refer to itself but the inherited prototype ? | function Foo ( ) { } function Bar ( ) { } Bar.prototype = new Foo ( ) console.log ( `` Bar.prototype.constructor === Foo ? `` + ( Bar.prototype.constructor === Foo ) ) console.log ( `` new Bar ( ) instanceof Bar ? `` + ( new Bar ( ) instanceof Bar ) ) = > Bar.prototype.constructor === Foo ? true= > new Bar ( ) instance... | Confusing `` instanceof `` result |
JS | I use .fnUpdate ( ) to generate table according to data that comes from the database.http : //legacy.datatables.net/refI have some teacher in the header of the table , and some information in the td in the body of the table.I can generate the data in TDs but I want to show the multiple td bellow one th.ProblemI can set... | < script src= '' https : //cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js '' > < /script > < script src= '' http : //code.jquery.com/jquery-1.11.3.min.js '' > < /script > < link href= '' https : //nightly.datatables.net/css/jquery.dataTables.css '' rel= '' stylesheet '' type= '' text/css '' / > < script src=... | fnUpdate the multi td for th with colspan |
JS | I would like to change the result of my form 's data before submitting but I am struggling with my scriptMy HTMLJavascript : I am trying to get a result like or similar to this.NoteThere is a possibility of having multiple rows ( not only 2 ) and they are not named row_n the name is just for example purpose | < form > < table > < tr class= '' row_1 '' > < td > < input name= '' flavour_1 '' type= '' text '' > < br > < input name= '' flavour_2 '' type= '' text '' > < /td > < td > < input name= '' taste_1 '' type= '' text '' > < br > < input name= '' taste_2 '' type= '' text '' > < /td > < /tr > < tr class= '' row_2 '' > < td ... | Manipulate form 's data result |
JS | I created 2 instances of a prototype , changed a function in prototype , changes reflected in both the instances ( Great ) .However , when I modified the prototype by removing the function , the function still existed for the existing instances.Line 1 and 2 are working as expected and after setting the protoype back to... | function A ( ) { this.name = `` cool '' ; } A.prototype = { howCool : function ( ) { return this.name + `` er '' ; } } ; var a1 = new A ( ) , a2 = new A ( ) ; a1.name = `` hot '' ; //line1console.log ( a1.howCool ( ) ) ; //line2console.log ( a2.howCool ( ) ) ; A.prototype = { } ; //line3console.log ( a1.howCool ( ) ) ;... | Javascript : Modifying Prototype does n't affect existing Instances |
JS | I do n't have the liberty of testing my Javascript on a foreign operating system . I would like to know if the following will work globally : If a Spanish OS were to run this , would it crash ? Would I have to use this instead ? I use strings to initialize Date because I hate using the numerical approaches which all re... | var d = new Date ( 'Tue Aug 20 2011 16:00:00 GMT-0700 ( Pacific Daylight Time ) ' ) ; var d = new Date ( 'Mar Ago 20 2011 16:00:00 GMT-0700 ( Pacífico Hora de verano ) ' ) ; | How is Javascript Date handled in other languages ? |
JS | http : //jsfiddle.net/Lx9h2smh/The problem is If I type a value in textBox say 3434 and now I want to make it 35434 by putting cursor after 3 and pressing 5 , it works fine in Firefox and IE but in chrome the 5 get added after value and it becomes 34345.The culprit line is one which replace non numeric characters.How t... | < div > < input type= '' text '' class= '' allownumericwithdecimal '' / > saadad < /div > $ ( `` .allownumericwithdecimal '' ) .live ( `` keypress keyup `` , function ( event ) { $ ( this ) .val ( $ ( this ) .val ( ) .replace ( / [ ^0-9\ . ] /g , `` ) ) ; var text = $ ( this ) .val ( ) ; if ( ! ( ( event.which > = 48 &... | Strange .replace ( ) behaviour in Chrome browser |
JS | I am learning javascript , and I have read somewhere the following code : I understand that the Object.create function return a new object which inherited the object ' o ' that has been passed as a parameter to the Object.create function . But , I do n't understand what is the sense to make this ? I mean , even the Obj... | if ( typeof Object.create ! == 'function ' ) { Object.create = function ( o ) { function F ( ) { } F.prototype = o ; return new F ( ) ; } ; } newObject = Object.create ( oldObject ) ; | Newbie : Need some explanation on this js code |
JS | I am trying to figure out a Modal Box Dynamically using jQuery without a form . | < a href= '' # openModal '' > Open Modal < /a > < div id= '' openModal '' class= '' modalDialog '' > < div > < a href= '' # close '' title= '' Close '' class= '' close '' > X < /a > < h2 > Modal Box < /h2 > < p > This is a sample modal box that can be created using the powers of CSS3. < /p > < p > You could do a lot of... | I am trying to figure out closing a Modal Box Dynamically using jquery without a form |
JS | I 'm reading through the MobX docs and I 'm confused by the following code : What is the significance of the @ symbol ? | class Todo { id = Math.random ( ) ; @ observable title = `` '' ; @ observable finished = false ; } @ observerclass TodoListView extends Component { render ( ) { return < div > < ul > { this.props.todoList.todos.map ( todo = > < TodoView todo= { todo } key= { todo.id } / > ) } < /ul > Tasks left : { this.props.todoList.... | What is the @ used for in JavaScript ? |
JS | What is the best way to handle state changes in a deep node which also need to be handled by a parent node . Here is my situation : Whenever someone is changing anything in the column property I only have to maintain the state of this value within that Column component . However , I now would like a sum of these values... | < Table > < Row prop= { user1 } > < Column prop= { user1_col1 } / > < Column prop= { user1_col2 } / > < /Row > < Row prop= { user2 } > < Column prop= { user2_col1 } / > < Column prop= { user2_col2 } / > < /Row > < TableFooter > < FooterColumn prop= { sum1 } / > < FooterColumn prop= { sum2 } / > < /TableFooter > < /Tabl... | React event hierarchy issue |
JS | i need to use slideDown function from jQuery , which requires the content to be animated to be put under class `` .hide `` , for .hide I had this in my custom css : which conflicted with Bootstrap css as it contains : thus when i linked both these stylesheets , slideDown was'nt working , then i tried diffrent variation... | .hide { display : none ; } .hide { display : none ! important ; } | bootstrap blocking jquery function |
JS | I was looking at nice timeline script and wanted to use , i made several change to css as per my design but I was wondering if i could change the color of active year from gray to red when page is being scrolled , I looked at the code and found that when page is scrolled no class is changed to relect sticky behaviour o... | # timeline h3 { position : -webkit-sticky ; position : sticky ; top : 5rem ; color : # 888 ; margin : 0 ; font-size : 1em ; font-weight : 400 ; } @ charset `` UTF-8 '' ; @ import url ( https : //fonts.googleapis.com/css ? family=Fira+Sans:200,400,500 ) ; * { border : 0 ; margin : 0 ; padding : 0 ; } html { height : 100... | Change color of Sticky text when its active |
JS | I 'm having trouble coming up with this stream.What I 'm looking for is something like debounceTime but with priority.So if I have events with the shape { type : ' a ' , priority : 2 } . These events needs to be debounced by a few seconds but instead of the last event being emitted , the event with the highest priority... | input stream : -- -- -- ( a|1 ) -- ( b|3 ) -- - ( c|2 ) -- -- -- -- -- -- -- -- -- -- -- - ( a|1 ) -- -- -- -- -- -- -- -- -output stream : -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - ( b|3 ) -- -- -- -- -- -- -- -- -- -- - ( a|1 ) -- -- - | RxJS Debounce with priority |
JS | I am learning VueJs , in this sandbox https : //codesandbox.io/s/o29j95wx9 it has lines like thisWhat does the ... in ... this. $ listeners , do ? I tried searching for it but every search engine filters out that query . I do n't know what it 's called.I also see it used in vuex like this | < script > export default { props : { value : { type : String , default : `` , } } , computed : { listeners ( ) { return { // Pass all component listeners directly to input ... this. $ listeners , // Override input listener to work with v-model input : event = > this. $ emit ( 'input ' , event.target.value ) } } } } < ... | What does the ... do in Javascript ? |
JS | Suppose I create an object factory like so : Now suppose I create hundreds of instances of this object : Does each obj1 , obj2 , ... store their own copy of obj.add or do they all contain a reference to a single instance of obj.add stored in memory ? Thanks ! | var newObj=function ( x ) { var obj= [ ] obj.x=x obj.add=function ( n ) { return this.x+n } return obj } var obj1=newObj ( 1 ) var obj2=newObj ( 2 ) ... | efficiency of anonymous function storage |
JS | I have a list from DB which is displayed in select multiple tags : Given an array of values from DB , need to select only those items that are found in the DB array , for example [ 2,4,7 ] . How do I push , with jQuery , attr ( 'selected ' ) to these option tags ? Like above . | < select multiple= '' multiple '' id= '' list '' name= '' color '' > < option value= '' 1 '' > Red < /option > < option value= '' 2 '' > Green < /option > < option value= '' 3 '' > Blue < /option > < option value= '' 4 '' > Magenta < /option > < option value= '' 5 '' > Black < /option > < option value= '' 6 '' > Cyan <... | Set selected option to multiple list using jQuery |
JS | What is the best way to detect runs of dom elements in jQuery ? For instance , if I have the following list of itemsSay I want to grab all the li.foo elements and wrap them inside their own < ol > block ( or any wrapper for that matter ) to end up with something like.As you can see from the example , I only want to wra... | < ol > < li class= '' a '' > < /li > < li class= '' foo '' > < /li > < li class= '' a '' > < /li > < li class= '' a '' > < /li > < li class= '' foo '' > < /li > < li class= '' foo '' > < /li > < li class= '' foo '' > < /li > < li class= '' a '' > < /li > < li class= '' foo '' > < /li > < li class= '' foo '' > < /li > <... | Detecting `` runs '' of DOM elements in jQuery |
JS | I am trying to make a menu appear from right side by jQuery animation by clicking on a span which have runmenu class but it does not work , I made the same class for a button and it worked fine , what is the problem here and why it works for button only ? ! | $ ( document ) .ready ( function ( ) { $ ( `` .runmenu '' ) .click ( function ( ) { $ ( `` .menu '' ) .animate ( { `` right '' : 0 } , 1000 ) ; } ) ; } ) ; /* Global*/.conatianer { width : 1026.66px ; } /*End global*//*Start navbar*/.navbar { position : relative ; background : url ( http : //vividmarketinginc.com/wp-co... | Span element does not run the animation from jQuery |
JS | I have an array of objects that I wish to sort by some grouping property data and a string telling me which property to group by ( eg : 'Organization ' or 'Organization.Name ' ) I need to write a function which takes in data that looks like beforeData and returns afterDataInput : Output : How would I go about accomplis... | beforeData = [ { 'name ' : 'John Doe ' , 'Id':1 , 'Organizations ' : [ { 'Id':12 , 'LongName ' : 'Group A ' } , { 'Id':13 , 'LongName ' : 'Group B ' } ] } , { 'name ' : 'FooBar ' , 'Id':2 , 'Organizations ' : [ { 'Id':13 , 'LongName ' : 'Group B ' } , { 'Id':14 , 'LongName ' : 'Group C ' } ] } , { 'name ' : 'Kristine B... | Given an array of objects how do I sort the objects by a property in depth n |
JS | In Chrome , the following code does not display the < h1 > Hello < /h1 > until after the alert is shown and the user clicks ok . However , in Firefox the expected sequence happens , < h1 > Hello < /h1 > is displayed and then the alert appears.I 'm curious why Hello shows up after the alert is closed in Chrome . Is that... | < h1 > Hello < /h1 > < script > alert ( 'Hello is displayed after this alert ' ) < /script > | HTML before an alert is not shown |
JS | I do n't know too much about the JavaScript garbage collector , just that it attempts to manage references so that unreferenced objects can be periodically purged from memory . I was thinking about something that I thought might improve performance if it was feasible by the language implementers.It would go something l... | `` no gc '' ; | can objects be marked not to be garbage collected ? |
JS | In golang there is the _ ( Blank Identifier ) . this way you can omit the 2nd and 3rd return values of a function.In javascript is it possible to do this ? | myValue , _ , _ : = myFunction ( ) function myFunction ( ) { return [ 1,2,3 ] } // Something like thisconst [ first , _ , _ ] = myFunction ( ) | Blank identifier in Javascript |
JS | I am currently learning Javascript.I 've read that an object which has an internal member [ [ Call ] ] produces function as the result of typeof that object.I wonder whether I can set this internal member in my Javascript code , i.e . is something like this possible ? : And if it is possible , would this change the res... | function my_foo ( ) { } var my_obj = { } ; // is the ' ; ' an empty statement ? my_obj [ `` [ [ Call ] ] '' ] =my_foo ; // in my test , this did n't work | Transform a Javascript Object to Function manually |
JS | I 'm still learning Angular and have started to create a simple website . I have routing and some logic in my view to have an active class on the menu item when the url is on that page . The problem I am starting to see is if I change the url from / to /home I have to update it in the routing and view and also the logi... | angular.module ( 'simpleApp ' , [ 'ngRoute ' ] ) .config ( [ ' $ routeProvider ' , ' $ locationProvider ' , function ( $ routeProvider , $ locationProvider ) { $ routeProvider .when ( '/ ' , { templateUrl : 'views/home/index.html ' } ) .when ( '/about ' , { templateUrl : 'views/about/index.html ' , controller : 'AboutC... | DRY up logic in view as well as $ routing |
JS | say I have an array [ [ `` a '' , `` b '' ] , [ `` c '' , `` d '' ] ] how can I iterate or reduce or map or join this array and get [ `` ac '' , `` ad '' , `` bc '' , `` bd '' ] and if array is like [ [ `` a '' , `` b '' ] , [ `` c '' , `` d '' ] , [ `` e '' , `` f '' ] ] I should get like [ `` ace '' , `` acf '' , `` ... | const output = [ ] ; const sol = array.reduce ( ( cum , ind ) = > { for ( let i = 0 ; i < = cum.length ; i++ ) { for ( let j = 0 ; j < = ind.length ; j++ ) { output.push ( ` $ { cum [ i ] } + $ { ind [ j ] } ` ) ; } } } ) ; console.log ( output ) ; | iterate array of arrays and concat in javascript |
JS | In python , I can do the following , to conditionally use a 2nd list if a 1st one is empty : In javascript , however , So , if the `` or trick '' is off the table , I 'm wondering whats the most concise way to do something like the following if-javascript-were-python-this-would-work pseudocode : | > > > x = [ ] or [ 1 , 2 ] > > > x [ 1 , 2 ] > > > x = [ ] || [ 1 , 2 ] ; [ ] $ elems = $ ( 'first-selector ' ) || $ ( 'second-selector ' ) | jquery : is there a concise way to conditionally use a 2nd selector if a 1st selector comes back empty ? |
JS | I have the following key/value objectSo each key has an object with a value and a hidden attribute , I 'm stuck on how to achieve the following.Transform the nested object so each key just has it 's value . Not the object with value and hidden . The big issue it seems for me is that it 's nested.. So it has to work rec... | form : { id : { value : this.item.id , hidden : true } , title : { value : this.item.title } , translations : { en : { locale : { value : 'en ' , hidden : true } , name : { value : 'Hello World ' } } , nl : { locale : { value : 'nl ' , hidden : true } , name : { value : 'Hallo Wereld ' } } } } form : { id : this.item.i... | Transform an object with objects in it |
JS | why this kind of bad design is made on js ? Is there any special reason to design the automatic semicolon insertion like this ? Here is my code , It is not work in js in chrome : Here is the error : I know the right version of this code is : I just want to know why js syntax is designed so stupid . History reason ? I a... | ( function ( ) { console.log ( `` abc '' ) ; } ) ( ) ( function ( ) { console.log ( `` 123 '' ) ; } ) ( ) ; Uncaught TypeError : ( intermediate value ) ( ... ) is not a function ( function ( ) { console.log ( `` abc '' ) ; } ) ( ) ; ( function ( ) { console.log ( `` 123 '' ) ; } ) ( ) ; x=1 ( function ( ) { console.log... | why a newline between parentheses of two function calls not treat as two statements in js ? |
JS | If I execute the statementwill I actually get an instance of moo ? This seems at both the same time obvious and non-intuitive . Functionally , this is what should happen , but at the same time this is not-expected if you did n't know the internals.EDIT : I realized this seems unintuitive b.c . in Java constructors can ... | var foo = function ( ) { return new moo ( ) ; } var moo = function ( ) { return this ; } new foo ( ) | Will new return the named function constructor instance- ? |
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