Box Sizing

Can I use ?Can I use ?
box-sizing:value / box:valuebox-sizing: value
box:contentbox-sizing: content-box
box:borderbox-sizing: border-box


The box-sizing CSS property sets how the total width and height of an element is calculated.

<div class="">
<div class="box:content bg:blue-50 w:80 h:80 p:20 b:5|solid|white/.5">
    <div class="stripe-bg full"></div>

Applying with functions

<div class="box-sizing:$(value)">...</div>

Master supports native CSS variables and functions, just add var(--key) or use shorthand$(key) for variables.

You can also use calc(expression), env(expression) and other CSS functions if the property supports it.

To learn more, see the Functions documentation.

Conditionally apply

States and selectors

<div class="box-sizing:1/1:hover">...</div>

Master supports all native CSS selectors, just add :hover, :disabled, chaining, combinators and other CSS selectors as usual.

To learn more, see the Selectors documentation.

Responsive breakpoints

<div class="box-sizing:1/1@sm">...</div>

Responsive breakpoints can be applied to all styles. Some available breakpoints are 3xs, 2xs, xs, sm,md, lg, xl, 2xl, 3xl, 4xl. Arbitrary breakpoints can be specified through comparison operators >, >=, <, <=.

To learn more, see the Breakpoints documentation.

<div class="box-sizing:1/1@print">...</div>

Master supports media types like print, screen, speech, all, and other media queries.

To learn more, see the Media Queries documentation.

Dark mode and color schemes

<div class="box-sizing:1/1@dark">...</div>

Master uses the selector html.dark to support color schemes. Now, you can easily fine-tune your style for the color schemes.

To learn more, see the Color Schemes documentation.

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Edited byAronLola