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Theming in LessCSS
Customization and theme support are crucial for web development, allowing designers to quickly iterate through visual variations. In LessCSS, theming can be achieved by dynamically defining and overriding variables based on appearance CSS classes.
One basic approach involves manually defining fallback variables and overriding them within appearance classes:
// Default appearance @navBarHeight: 50px; .appearanceWhite { @navBarHeight: 130px; } .appearanceBlack { @navBarHeight: 70px; }
However, for more complex scenarios, a reusable theming solution is desired. One method involves using dynamic loops and extracting variables from a theme definition:
@themes: ( blue: rgb( 41, 128, 185), marine: rgb( 22, 160, 133), green: rgb( 39, 174, 96), orange: rgb(211, 84, 0), red: rgb(192, 57, 43), purple: rgb(142, 68, 173) ); .themed(@property) { .for(@themes); .-each(@theme) { @name: extract(@theme, 1); @color: extract(@theme, 2); .theme-@{name} & { @{property}: @color; } } }
Usage:
#navBar { .themed(background-color); }
This approach simplifies the definition and application of themes, allowing for easy customization of multiple aspects of a UI.
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