HTMLMediaElement: loadstart event
The loadstart
event is fired when the browser has started to load a resource.
Bubbles | No |
---|---|
Cancelable | No |
Interface | Event |
Event handler property | onloadstart |
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>
JS
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://interactive-examples.mdn.mozilla.net/media/examples/flower.webm');
source.setAttribute('type', 'video/webm');
video.appendChild(source);
}
});
Result
Specifications
Specification |
---|
HTML Standard # event-media-loadstart |
Browser compatibility
BCD tables only load in the browser