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To update the icon of a Flutter Windows |
desktop application before packaging use the |
following instructions:When packaging with the msix pub package, |
the logo path can also be configured inside the pubspec.yaml file.To update the application image in the Store listing, |
navigate to the Store listing step of the submission |
and select Store logos. |
From there, you can upload the logo with |
the size of 300 x 300 pixels.All uploaded images are retained for subsequent submissions.<topic_end> |
<topic_start> |
Validating the application package |
Before publication to the Microsoft Store, |
first validate the application package locally.Windows App Certification Kit |
is a tool included in the |
Windows Software Development Kit (SDK).To validate the application:The report might contain important warnings and information, |
even if the certification passes. |
<topic_end> |
<topic_start>Build and release a web app |
During a typical development cycle, |
you test an app using flutter run -d chrome |
(for example) at the command line. |
This builds a debug version of your app.This page helps you prepare a release version |
of your app and covers the following topics:<topic_end> |
<topic_start> |
Building the app for release |
Build the app for deployment using the |
flutter build web command. |
You can also choose which renderer to use |
by using the --web-renderer option (See Web renderers). |
This generates the app, including the assets, |
and places the files into the /build/web |
directory of the project.The release build of a simple app has the |
following structure:info Note |
The canvaskit directory and its contents are only present when the |
CanvasKit renderer is selected—not when the HTML renderer is selected.Launch a web server (for example, |
python -m http.server 8000, |
or by using the dhttpd package), |
and open the /build/web directory. Navigate to |
localhost:8000 in your browser |
(given the python SimpleHTTPServer example) |
to view the release version of your app.<topic_end> |
<topic_start> |
Deploying to the web |
When you are ready to deploy your app, |
upload the release bundle |
to Firebase, the cloud, or a similar service. |
Here are a few possibilities, but there are |
many others:<topic_end> |
<topic_start> |
Deploying to Firebase Hosting |
You can use the Firebase CLI to build and release your Flutter app with Firebase |
Hosting.<topic_end> |
<topic_start> |
Before you begin |
To get started, install or update the Firebase CLI:<topic_end> |
<topic_start> |
Initialize Firebase |
Enable the web frameworks preview to the Firebase framework-aware CLI:In an empty directory or an existing Flutter project, run the initialization |
command:Answer yes when asked if you want to use a web framework.If you’re in an empty directory, |
you’ll be asked to choose your web framework. Choose Flutter Web.Choose your hosting source directory; this could be an existing flutter app.Select a region to host your files.Choose whether to set up automatic builds and deploys with GitHub.Deploy the app to Firebase Hosting:Running this command automatically runs fl... |
so you don’t have to build your app in a separate step.To learn more, visit the official Firebase Hosting documentation for |
Flutter on the web.<topic_end> |
<topic_start> |
Handling images on the web |
The web supports the standard Image widget to display images. |
By design, web browsers run untrusted code without harming the host computer. |
This limits what you can do with images compared to mobile and desktop platforms.For more information, see Displaying images on the web.<topic_end> |
<topic_start> |
Choosing a web renderer |
By default, the flutter build and flutter run commands |
use the auto choice for the web renderer. This means that |
your app runs with the HTML renderer on mobile browsers and |
CanvasKit on desktop browsers. We recommend this combination |
to optimize for the characteristics of each platform.For more information, see Web renderers.<topic_end> |
<topic_start> |
Minification |
Minification is handled for you when you |
create a release build.<topic_end> |
<topic_start> |
Embedding a Flutter app into an HTML page |
<topic_end> |
<topic_start> |
hostElement |
Added in Flutter 3.10 |
You can embed a Flutter web app into |
any HTML element of your web page, with flutter.js and the hostElement |
engine initialization parameter.To tell Flutter web in which element to render, use the hostElement parameter of the initializeEngine |
function:To learn more, check out Customizing web app initialization.<topic_end> |
<topic_start> |
Iframe |
You can embed a Flutter web app, |
as you would embed other content, |
in an iframe tag of an HTML file. |
In the following example, replace “URL” |
with the location of your HTML page:<topic_end> |
<topic_start> |
PWA Support |
As of release 1.20, the Flutter template for web apps includes support |
for the core features needed for an installable, offline-capable PWA app. |
Flutter-based PWAs can be installed in the same way as any other web-based |
PWA; the settings signaling that your Flutter app is a PWA are provided by |
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