Can Less variables like @navBarHeight be thematized?

The Art of Thematization in Less

When developing an app, frequent visual modifications are inevitable as we strive towards customer validation. Preserving certain page aesthetics (themes) for quick customer presentation is desirable.

One approach involves creating appearance classes applied to the body element, allowing for swift page transformations. This begs the question: can Less variables such as @navBarHeight be thematized?

Customizable Theming with Less

The feasibility of this depends on the extent of style and variable variations between themes. A simple starting point:

@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)
);

#navBar {
    .themed(background-color);
}

.themed(@property) {
    .for(@themes); .-each(@theme) {
        @name:  extract(@theme, 1);
        @color: extract(@theme, 2);

        .theme-@{name} & {
            @{property}: @color;
        }
    }
}

Beyond Basics: Enhanced Customization

Employing techniques like Pattern Matching and Ruleset Arguments enables automated generation of complex theme hierarchies. Consider this example:

#navBar {
    .themed({
        color:            @fore-color;
        background-color: @back-color;
    });
}

.theme(@name: green) {
    @fore-color: green;
    @back-color: spin(@fore-color, 180);
    .apply();
}

.theme(@name: blue) {
    @fore-color: blue;
    @back-color: (#fff - @fore-color);
    .apply();
}

.theme(@name: black-and-white) {
    @fore-color: black;
    @back-color: white;
    .apply();
}

This allows for a highly adaptable theming system tailored to specific design requirements. With Less, the possibilities for flexible thematization are endless.

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