Web/API/HTMLMediaElement/progress event

The progress event is fired periodically as the browser loads a resource.

Bubbles	No
Cancelable	No
Interface	Event
Event handler property	onprogress

Examples

Live example

HTML

<div class="example">

    <button type="button">Load video</button>
    <video controls width="250"></video>

    <div class="event-log">
        <label>Event log:</label>
        <textarea readonly class="event-log-contents"></textarea>
    </div>

</div>

CSS

.event-log-contents {
  width: 18rem;
  height: 5rem;
  border: 1px solid black;
  margin: .2rem;
  padding: .2rem;
}

.example {
  display: grid;
  grid-template-areas:
              "button log"
              "video  log";
}

button {
  grid-area: button;
  width: 10rem;
  margin: .5rem 0;
}

video {
  grid-area: video;
}

.event-log {
  grid-area: log;
}

.event-log>label {
  display: block;
}

JavaScript

const loadVideo = document.querySelector('button');
const video = document.querySelector('video');
const eventLog = document.querySelector('.event-log-contents');
let source = null;

function handleEvent(event) {
    eventLog.textContent = eventLog.textContent + `${event.type}\n`;
}

video.addEventListener('loadstart', handleEvent);
video.addEventListener('progress', handleEvent);
video.addEventListener('canplay', handleEvent);
video.addEventListener('canplaythrough', handleEvent);

loadVideo.addEventListener('click', () => {

    if (source) {
        document.location.reload();
    } else {
        loadVideo.textContent = "Reset example";
        source = document.createElement('source');
        source.setAttribute('src', 'https://mdn.github.io/learning-area/html/multimedia-and-embedding/video-and-audio-content/rabbit320.mp4');
        source.setAttribute('type', 'video/mp4');

        video.appendChild(source);
    }
});

Specifications

Specification	Status
HTML Living StandardThe definition of 'progress media event' in that specification.	Living Standard
HTML5The definition of 'progress media event' in that specification.	Recommendation

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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
progress event	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

See also

• HTMLAudioElement
• HTMLVideoElement
• <audio>
• <video>

HTMLMediaElement: progress event by Mozilla Contributors is licensed under CC-BY-SA 2.5.