Aspect Ratio

Overview

The aspect-ratio CSS property sets a preferred aspect ratio for the box, which will be used in the calculation of auto sizes and some other layout functions.

<div class="aspect:4/3 ...">
    4/3
</div>

Basic usage

Embedding a video

<iframe class="video w:full"
     src="https://www.youtube.com/embed/1-xGerv5FOk"
     title="YouTube video player" 
     frameborder="0" 
     allowfullscreen
     allow="
        accelerometer; 
        autoplay; 
        clipboard-write; 
        encrypted-media; 
        gyroscope; 
        picture-in-picture">
</iframe>

In most cases, the aspect ratio is usually set with w:full.

Same aspect ratio grids

<div class="grid-cols:3 gap:10">

    <div class="aspect:1/1 ...">1/1</div>
    <div class="aspect:1/1 ...">1/1</div>
    <div class="aspect:1/1 ...">1/1</div>

</div>

Applying with functions

<div class="aspect:$(ratio)">...</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="aspect: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="aspect: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.

Print format and media queries

<div class="aspect: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="aspect: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.