SourceBuffer: updatestart event - Web APIs

SourceBuffer: updatestart event - Web APIs | MDN

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("updatestart", (event) => { })

onupdatestart = (event) => { }

Event type

A generic Event.

Examples

Listening for the updatestart event

const sourceBuffer = source.addSourceBuffer(mimeCodec);
sourceBuffer.addEventListener("updatestart", () => {
  downloadStatus.textContent = "Modifying buffer...";
});
sourceBuffer.addEventListener("updateend", () => {
  downloadStatus.textContent = "Modification complete";
});