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They share a common font.
| 7,185.27
| 1.32
|
They share a common size
and many other properties
| 7,186.59
| 2.7
|
are all shared between these elements.
| 7,189.29
| 1.8
|
There are just some things that are
a little bit different about them.
| 7,191.09
| 3.75
|
I could have written three
different CSS selectors
| 7,194.84
| 2.46
|
to deal with all of these cases, but
there might be some repetition there.
| 7,197.3
| 3.73
|
So here's what I can do by
taking advantage of the features
| 7,201.03
| 2.93
|
that Sass gives me.
| 7,203.96
| 1.65
|
Let me go ahead and look at
inheritance.scss to look at the code
| 7,205.61
| 4.95
|
for doing this.
| 7,210.56
| 1.97
|
And it looks a little
bit cryptic at first.
| 7,212.53
| 3.12
|
But here's what I've defined.
| 7,215.65
| 1.71
|
I've here defined using a percent sign
that this is what a generic message is
| 7,217.36
| 4.44
|
going to be, something that I can extend
later to add additional information to.
| 7,221.8
| 4.41
|
All of the messages, whether they be
success messages or danger messages
| 7,226.21
| 3.18
|
or warning messages, they're
all going to have the same font.
| 7,229.39
| 2.81
|
They're all going to
have the same border.
| 7,232.2
| 1.75
|
They're all going to have the
same padding and margin, spacing
| 7,233.95
| 2.58
|
around and outside of it.
| 7,236.53
| 1.56
|
But each of the specific messages
are going to be slightly different.
| 7,238.09
| 4.86
|
How are they different?
| 7,242.95
| 1.09
|
Well, let's take a look down here.
| 7,244.04
| 1.91
|
Anything with a class of success, I'm
going to say extends this message.
| 7,245.95
| 6.12
|
And by extends this message what I
mean is that anything with a class
| 7,252.07
| 3.42
|
of success is going to inherit all
of these CSS properties-- the font,
| 7,255.49
| 4.77
|
the border, the padding in the margin--
| 7,260.26
| 2.4
|
but it's going to add
additional information to it.
| 7,262.66
| 2.13
|
In particular, we're
going to add a color.
| 7,264.79
| 2.34
|
We're going to say that
for success messages,
| 7,267.13
| 1.89
|
the background color
is going to be green.
| 7,269.02
| 2.71
|
I've extended the basics of
what a message is, but said
| 7,271.73
| 2.78
|
that this message in particular has
some additional style that we're
| 7,274.51
| 3.6
|
going to assign to it as well.
| 7,278.11
| 2.22
|
And the other two messages
behave in very similar ways.
| 7,280.33
| 2.67
|
My warning message extends
the message, but instead
| 7,283
| 3.18
|
says the background
color should be orange.
| 7,286.18
| 2.22
|
And finally, the error message
also extends the message.
| 7,288.4
| 2.82
|
But this time, it gives us the
background color of red instead.
| 7,291.22
| 4.51
|
So now, when you compile
this all together
| 7,295.73
| 2.3
|
into inheritance.css, which
I compiled it in advance,
| 7,298.03
| 4.3
|
this is what this is
ultimately going to look like.
| 7,302.33
| 2.18
|
It translates what I've
written into saying,
| 7,304.51
| 2.34
|
all right, success
and warning and errors
| 7,306.85
| 2.82
|
should have all of these properties.
| 7,309.67
| 2.19
|
But success should also
have this background color,
| 7,311.86
| 2.36
|
warning should have
this background color,
| 7,314.22
| 1.75
|
error should have this background color.
| 7,315.97
| 1.96
|
So again, we could
have written this CSS.
| 7,317.93
| 2.18
|
There is nothing that
Sass does that we couldn't
| 7,320.11
| 2.76
|
have written ourselves using CSS.
| 7,322.87
| 2.58
|
Sass we'll just make it a little bit
easier to do many of the same thing.
| 7,325.45
| 3.67
|
So we can write things in a
little bit of a nicer syntax
| 7,329.12
| 2.57
|
by saying the success message
inherits from the message
| 7,331.69
| 3.15
|
but adds a background color.
| 7,334.84
| 1.6
|
And likewise, the warning and
error messages do the same thing,
| 7,336.44
| 3.36
|
but in a simpler syntax and a bit
of a nicer syntax, such that later
| 7,339.8
| 3.8
|
we can let the computer take the Sass
code and compile it into CSS instead.
| 7,343.6
| 6
|
And so those now are
some of the fundamentals
| 7,349.6
| 2.46
|
of what we've seen in building
web programs using HTML and CSS.
| 7,352.06
| 3.99
|
We've seen how we can use HTML to
describe the structure of our web page,
| 7,356.05
| 3.9
|
deciding what's going to show up where
on the page, and then we looked at CSS
| 7,359.95
| 3.57
|
and how CSS can then be used to style
our web page in various different ways,
| 7,363.52
| 4.05
|
adding custom styling
like colors and layouts,
| 7,367.57
| 2.49
|
but also thinking about
things like responsive design,
| 7,370.06
| 3.03
|
like what happens on a
mobile screen or on a tablet,
| 7,373.09
| 2.52
|
and making sure that our web pages
look good on those screens too.
| 7,375.61
| 3.67
|
And then finally, we took a look
at Sass, an extension to CSS,
| 7,379.28
| 3.43
|
that adds a number of
additional features,
| 7,382.71
| 1.75
|
features like variables and
nesting and inheritance,
| 7,384.46
| 3.14
|
that make it even easier for
us to be able to write style
| 7,387.6
| 2.77
|
that we can apply to our web pages.
| 7,390.37
| 2.09
|
From there, we're going
to be transitioning now
| 7,392.46
| 1.96
|
to looking at how we can use HTML
and CSS in larger web applications
| 7,394.42
| 4.14
|
as we begin to incorporate other
tools, tools like Python and JavaScript
| 7,398.56
| 4.11
|
and other languages and
frameworks altogether.
| 7,402.67
| 2.25
|
So this is Web Programming
with Python and JavaScript.
| 7,404.92
| 3.09
|
We'll see you next time.
| 7,408.01
| 2.09
|
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