Resize Observer

The Resize Observer component offers a thin, declarative interface to the ResizeObserver API.

The resize observer will report changes to the dimensions of the elements it wraps through the wa-resize event. When emitted, a collection of ResizeObserverEntry objects will be attached to event.detail that contains the target element and information about its dimensions.

<div class="resize-observer-overview">
  <wa-resize-observer>
    <div>Resize this box and watch the console 👉</div>
  </wa-resize-observer>
</div>

<script>
  const container = document.querySelector('.resize-observer-overview');
  const resizeObserver = container.querySelector('wa-resize-observer');

  resizeObserver.addEventListener('wa-resize', event => {
    console.log(event.detail);
  });
</script>

<style>
  .resize-observer-overview div {
    display: flex;
    border: solid 2px var(--wa-color-surface-border);
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
  }
</style>

Slots Jump to heading

Learn more about using slots.

Attributes & Properties Jump to heading

Learn more about attributes and properties.

Events Jump to heading

Learn more about events.

Importing Jump to heading

Autoloading components via projects is the recommended way to import components. If you prefer to do it manually, use one of the following code snippets.

import '@awesome.me/webawesome/dist/components/resize-observer/resize-observer.js';

import WaResizeObserver from '@awesome.me/webawesome/dist/react/resize-observer';