ResizeObserverSize: inlineSize property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2022.

The inlineSize read-only property of the ResizeObserverSize interface returns the length of the observed element's border box in the inline dimension. For boxes with a horizontal writing-mode, this is the horizontal dimension, or width; if the writing-mode is vertical, this is the vertical dimension, or height.

Note: For more explanation of writing modes and block and inline dimensions, read Handling different text directions.

Value

A decimal representing the inline size in pixels.

Examples

In this example we return an array of sizing information with ResizeObserverEntry.contentBoxSize. The inlineSize property returns the inline dimension size of the observed element.

js
const resizeObserver = new ResizeObserver((entries) => {
  for (const entry of entries) {
    const elemSize = entry.contentBoxSize[0];
    console.log(elemSize.inlineSize); // a decimal
  }
});

resizeObserver.observe(divElem);

Specifications

Specification
Resize Observer
# dom-resizeobserversize-inlinesize

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
inlineSize
Chrome – Full support
Chrome 84 (Release date: 2020-07-27)
footnote Full support
Edge – Full support
Edge 84 (Release date: 2020-07-16)
footnote Full support
Firefox – Full support
Firefox 69 (Release date: 2019-09-03)
footnote Full support
Opera – Full support
Opera 70 (Release date: 2020-07-27)
footnote Full support
Safari – Full support
Safari 15.4 (Release date: 2022-03-14)
footnote Full support
Chrome Android – Full support
Chrome Android 84 (Release date: 2020-07-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 79 (Release date: 2020-07-28)
footnote Full support
Opera Android – Full support
Opera Android 60 (Release date: 2020-09-23)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 84 (Release date: 2020-07-27)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15.4 (Release date: 2022-03-14)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support