[SCSS] Convert SCSS Variable Arguments to JavaScript

We will learn how to convert variable arguments by using rest operator in JavaScript.

.sass-btn {

  color: #fff;

  background-color: #0069d9;

  margin: 5px;

  @include button-size();

  @include box-shadow(0px 4px 5px #, 2px 6px 10px #);

}

@mixin box-shadow($shadows...) {

  -moz-box-shadow: $shadows;

  -webkit-box-shadow: $shadows;

  box-shadow: $shadows;

}

Scss "$shadows..." the same as "...shadows" in Javascript.

export const boxShadow = (...shadows) => `

  -moz-box-shadow: ${shadows};

  -webkit-box-shadow: ${shadows};

  box-shadow: ${shadows};

`

interesting thing is ...shadows in Javascript is an Array, but if we put into ${}, then it conver to a string:

const shadows = ['red', 'blue'];

console.log(`${shadows}`); // red, blue