Web/API/SVGAnimationElement/beginEvent event

The beginEvent event of the SVGAnimationElement interface is fired when the element local timeline begins to play. It will be raised each time the element begins the active duration (i.e., when it restarts, but not when it repeats).

It may be raised both in the course of normal (i.e. scheduled or interactive) timeline play, as well as in the case that the element was begun with a DOM method.

Bubbles	No
Cancelable	No
Interface	`TimeEvent`
Event handler property	`onbegin`

Examples

Animated circle

<svg xmlns="http://www.w3.org/2000/svg" width="300px" height="100px">
  <title>SVG SMIL Animate with Path</title>
  <circle cx="0" cy="50" r="50" fill="blue" stroke="black" stroke-width="1">
    <animateMotion
       path="M 0 0 H 300 Z"
       dur="5s" repeatCount="indefinite" />
  </circle>
</svg>

<hr>

<ul>

</ul>

ul {
  height: 100px;
  border: 1px solid #ddd;
  overflow-y: scroll;
  padding: 10px 30px;
}

let svgElem = document.querySelector('svg');
let animateElem = document.querySelector('animateMotion');
let list = document.querySelector('ul');


animateElem.addEventListener('beginEvent', () => {
  let listItem = document.createElement('li');
  listItem.textContent = 'beginEvent fired';
  list.appendChild(listItem);
})

animateElem.addEventListener('repeatEvent', (e) => {
  let listItem = document.createElement('li');
  let msg = 'repeatEvent fired';
  if(e.detail) {
    msg += '; repeat number: ' + e.detail;
  }
  listItem.textContent = msg;
  list.appendChild(listItem);
})

Event handler property equivalent

Note that you can also create an event listener for the begin event using the onbegin event handler property:

animateElem.onbegin = () => {
  console.log('beginEvent fired');
}

Specifications

Specification	Status	Comment
Scalable Vector Graphics (SVG) 2The definition of 'beginEvent' in that specification.	Candidate Recommendation	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`beginEvent` event	Chrome Full support Yes	Edge Full support 79	Firefox Full support Yes	IE No support No	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown