Ole Ersoy

Image by Gleb Korovko from Pixabay

Scenario

Within our app component we wish to add a onValid CSS class whenever the _valid property on the component is true.

Approach

Within styles.css create the onValid CSS class.

.onValid {
color: aqua;
}

Decorate a isValid() getter with @HostBinding that will add the onValid CSS class to the component whenever…

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Image by donations welcome from Pixabay

Scenario

We want to use a ternary expression in SASS.

This would allow us to for example initialize a default variable when a value is not defined liked this (Taken from the Angular define-palette) .

warn: if($warn != null, $warn, define-palette(palette.$red-palette)),

Approach

The evaluation of the below expression will set $result to $foreground .

$property: 'text';$result: if($property == 'text', '$foreground', '$background');@debug $result;

Angular Material Theming also uses it like this:

// We cast the $hue to a string, because some hues starting with a number, like `700-contrast`,// might be inferred as numbers by Sass. Casting them to string fixes the map lookup.$color: if(map.has-key($palette, $hue), map.get($palette, $hue), map.get($palette, $hue + ''));

Demo

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