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In the previous article we got to know in depth understanding of Sass/SCSS and how to use it.
If you are still new to Sass/SCSS then I recommend to check out my in depth article Sass or SCSS In-Depth Tutorial
In this article, I will be covering the difference between @mixin, @extends, and Placeholder.
When you use the @mixin in the code it will replicate the code in all the using blocks
Example -
@mixin wrapper{
margin:0px auto;
padding: 0px;
}
.w1{
@include wrapper;
}
.w2{
@include wrapper;
}
will be compiled to the following
.w1 {
margin: 0px auto;
padding: 0px;
}
.w2 {
margin: 0px auto;
padding: 0px;
}
The styles in the .w1 and .w2 styles is redundant
wrapper{
margin:0px auto;
padding: 0px;
}
.w1{
@extend wrapper;
}
.w2{
@extend wrapper;
}
will be compiled to the following
wrapper, .w1, .w2 {
margin: 0px auto;
padding: 0px;
}
Here the styles are not redundant, @extend is intelligent enough and adds wrapper,.w1,.w2
But there is one problem with this, if I don't use wrapper in my project then we are simply adding the redundant code in our style.
Example -
%wrapper{
margin:0px auto;
padding: 0px;
}
.w1{
@extend %wrapper;
}
.w2{
@extend %wrapper;
}
will be compiled to the following
.w1, .w2 {
margin: 0px auto;
padding: 0px;
}
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