Whether variables can be defined in css

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Variables can be defined in css. The syntax of the variable definition is "--variable name", and the variable name defined in css is case-sensitive; the var () function can be used to read the variable with the syntax "var (--variable name)", and the second parameter of the function can be used to represent the default value of the variable, which will be used if the variable does not exist.

The operating environment of this tutorial: windows10 system, CSS3&&HTML5 version, Dell G3 computer.

Can variables be defined in css?

Variables can be used in css.

When you declare a css variable, the variable name is preceded by two hyphens (- -). Variable names are case-sensitive,-- header-color and-- Header-Color are two different variables.

The var () function is used to read variables.

The var () function can also take the second argument, which represents the default value of the variable. If the variable does not exist, this default value is used.

The second parameter does not handle internal commas or spaces and is treated as part of the parameter.

Examples of variables used by css:

: root {--base: yellow;-- spacing: 10px;-- blur: 10px;}

The above code defines three variables: root makes it accessible to everyone

Img {filter: blur (var (--blur)); padding: var (--spacing); background: var (--base);}

The above uses the previously defined variable as the attribute value.

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