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Let's create a Sass map that gives our base colors a theme name. These theme names will come in handy later when we need to create classes for UI elements like buttons, form elements, progress bars, and more.
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Sass maps are fairly new to Sass, what
they do is allow us to collect values in
0:00
named groups then we can dynamically
access them from anywhere really.
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So let's create a map that gives our base
colors a theme name.
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So for instance we'll call the fountain
blue color the default theme,
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the emerald color will be for success
messages.
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Sunglo will be for errors and coral and
purple-majesty will be for
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warning and info messages, respectively.
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So, these theme names will come in handy
later when we need to create classes for
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UI elements like buttons, form elements,
progress bars and so forth.
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So, in our config.scss partial we'll
create our
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map right below the color usage variables.
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So, we'll add in new comment for UI
colors.
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And we'll call our map UI colors.
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So let's write dollar sign followed by UI
colors.
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And a set of parenthesis.
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So the way we retrieve values from maps is
with key value pairs.
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We write a key and its associated value.
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So for example let's make the first key
default and the value for
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default will be the fountain blue color
variable followed by a comma.
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And right below default we'll create one
for
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success and we'll make its value the
emerald color variable.
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Then we'll create one for error and we'll
make the value the sun glow variable.
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Another one for warning, and the value
will be the coral color variable,
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and finally we'll create one more key
called info and
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we'll make the value the purple majesty
color variable.
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So what were going to do next,
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is write an each directive to dynamically
generate a class name for each
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key in our map then output, its associated
color value, as a background color.
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So in our utilities.scss partial,
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I'm going to write the each rule first,
then explain what it does.
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So we'll say add each theme, color in UI
colors.
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[NOISE] Go ahead and
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give it some space here.
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[SOUND] So in this rule the theme
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and color variables represent
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the key value pairs we
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created in the UI colors map.
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So here we're saying, for each theme and
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color in the UI colors map create this
class selector for
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each key that dynamically appends the
theme name with this theme variable.
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Then pass it's associated value as the
background color.
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So this will sort of loop through each key
value pair, and
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output a CSS rule for each given theme
name.
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So now we'll go down to the console, and
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we'll write Sass watch scss to CSS.
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So when we bring up our CSS output, in
applications.css.
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You can see how it outputs a CSS rule for
each key value pair in our map.
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So, now anytime, we need to add a new
color class, we can simply add it
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to our Sass map and then it'll output it
with the associated color value.
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Pretty cool.
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So, the each directive and
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rule we just wrote, are doing exactly what
we need them to do.
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But there's still more we can do to make
things more modular and
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what I mean by that is currently the each
directive rule isn't really
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reusable since we are specifically calling
this UI color maps and
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in the rule we're using a particular class
for buttons.
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So let's instead wrap this rule in a mixin
so
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that we're able to include it in different
contexts.
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So we'll create a new mixin called
bgcolors so
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we'll say, mixin bg colors [SOUND] and in
the next sentence,
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we'll pass one argument for the map we
want to reference.
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So, let's call it map and we'll change the
UI colors and map here.
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To that new map variable.
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And in the selector,
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we'll change the button class to a parent
selector that appends the theme name.
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So, I'll just replace button with the and
percent selector.
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And now we're able to include this new
mixin,
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in any rule that needs a theme background
color.
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So we'll go ahead and save this utilities
partial, and we'll bring up the main .scss
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partial, and let's create a new selector
by targeting the button class, and
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inside the rule we can say, include BG
colors, or new mixin.
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And the map we want to pass is the ui
-colors map.
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So as an argument, we'll write ui-colors.
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So now when we save and compile our Sass,
and bring up the CSS output,
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we can see how it outputs the same button
theme rules.
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So the neat thing is that if we wanted to
create themes for progress bars.
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We can simply add that class to our
selector, so we can say Prog Bar.
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Let's also add another class for Tool Tip.
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And now when we save our SASS file and
bring up the output CSS.
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At the bottom of the file, we can see the
classes for the progbars, tooltips and
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buttons all grouped into one rule that
defines the theme background color.
6:30
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