


Using CSS Properties as SASS Mixin Values
In an attempt to create a versatile margin/padding mixin, you've encountered a snag in SASS. Let's delve into the problem you described and find a solution together.
Setting CSS Properties in Mixins
Your code attempts to set CSS properties (margin and padding) within SASS mixin values. However, there's a key issue: CSS properties cannot be used as mixin values directly. Instead, you need to employ a technique called "string interpolation" to include variables as property names.
Using String Interpolation
String interpolation allows you to insert variable values into strings using the #{$variable} syntax. This helps you set CSS properties dynamically based on variables within mixins.
Here's how you can modify your code to utilize string interpolation:
<code class="sass">[class*="shift"] { $sft-o: 10px; @mixin shift_stp($val) { &[class*="_sml"]{ #{$val}: $sft-o; } &[class*="_mid"]{ #{$val}: $sft-o * 2; } &[class*="_big"]{ #{$val}: $sft-o * 3; } } &[class*="_m"]{ @include shift_stp(margin); } &[class*="_p"]{ @include shift_stp(padding); } }</code>
Note on Attribute Selectors
It's important to note that the attribute selector you're using (*="_m") will also match elements with "_mid" in their class names. This might not be the behavior you intended, so consider revising your attribute selector accordingly.
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