13.3. Sass variable

发布时间 ： 2025-10-25 13:32:21 UTC      

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Variables are used to store some information and can be reused.

Sass variables can store the following information:

  • String

  • Figures

  • Color value

  • Boolean value

  • List

  • Null value

Sass variable use $ symbol:

$variablename: value;

The following example sets four variables: myFont , myColor , myFontSize , and myWidth .

After the variable is declared, we can use it in the code:

13.3.1. Sass code: 

$myFont: Helvetica, sans-serif; $myColor: red; $myFontSize: 18px; $myWidth: 680px; body { font-family: $myFont; font-size: $myFontSize; color: $myColor; } #container { width: $myWidth; }

Convert the above code to CSS code, as follows:

13.3.2. Css Code: 

body { font-family: Helvetica, sans-serif; font-size: 18px; color: red; } #container { width: 680px; }

Sass scope

The scope of a Sass variable can only have an effect at the current level, as follows the h1 style of the green , p tag is for red .

Sass code:

$myColor: red; h1 { $myColor: green; // Only useful in h1, local scope color: $myColor; } p { color: $myColor; }

Convert the above code to CSS code, as follows:

Css Code:

h1 { color: green; } p { color: red; }

13.3.3. !global

That’s for sure Sass , we can use the !global keyword to set the variable is global:

Sass code

$myColor: red; h1 { $myColor: green !global; // Global scope color: $myColor; } p { color: $myColor; }

Now the p style of the label becomes green .

Convert the above code to CSS code, as follows:

Css code

h1 { color: green; } p { color: green; }

Note: all global variables are generally defined in the same file, such as: \_globals.scss and then we use the @include to include the file.

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