Watch the size changes of a DOM element

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2.0.06 years ago6 years agoMinified + gzip package size for watch-size in KB


Watch Size PostCSSWatch Size
!NPM Versionnpm-imgnpm-url !Build Statuscli-imgcli-url !Support Chatgit-imggit-url
Watch Size lets you watch the size changes of a DOM element using the watchSize function.


Add Watch Size to your project:
npm install watch-size

Use watchSize() to rewrite your queries:
import watchSize from 'watch-size';

const stop = watchSize(
  ({ width, height }) => { /* callback */ }

/* use stop() to end listening */

How does it work?

The watchSize function attaches hidden, over-sized DOM elements to your target with scroll listeners that are triggered whenever the element resizes. This allows the listener to avoid polling, and to truly respond to size changes. This technique can be used in all browsers going back to Internet Explorer 9.
The entire script is about 400 bytes when minified and gzipped.