scss. constant
时间: 2023-10-21 15:12:28 浏览: 44
SCSS (Sassy CSS) `constant` is a feature that allows you to define a variable that cannot be changed once it is set. This is useful for defining values that are used multiple times throughout your codebase, such as colors, font sizes, or spacing. By defining them as constants, you can ensure that they are consistent across your entire project and cannot be accidentally overwritten.
Here's an example of how to define a constant in SCSS:
```
$my-constant: #ff0000 !default;
.foo {
color: $my-constant;
}
.bar {
background-color: $my-constant;
}
```
In this example, `$my-constant` is defined as a variable with the value `#ff0000`. The `!default` flag ensures that if `$my-constant` is already defined elsewhere, it will not be overwritten.
Then, `$my-constant` is used in two different selectors, `.foo` and `.bar`, to set the color and background-color properties respectively. Since `$my-constant` is defined as a constant, it cannot be changed later in the code.
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