HTMLMediaElement: progress event
The progress
event is fired periodically as the browser loads a resource.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("progress", (event) => {});
onprogress = (event) => {};
Event type
A generic Event
.
Examples
Live example
HTML
html
<div class="example">
<button type="button">Load video</button>
<video controls width="250"></video>
<div class="event-log">
<label for="eventLog">Event log:</label>
<textarea readonly class="event-log-contents" id="eventLog"></textarea>
</div>
</div>
JavaScript
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 += `${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);
}
});
Result
Specifications
Specification |
---|
HTML Standard # event-media-progress |
HTML Standard # handler-onprogress |
Browser compatibility
BCD tables only load in the browser