SourceBuffer: abort event

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Note: This feature is available in Dedicated Web Workers.

The abort event of the SourceBuffer interface is fired when the buffer appending is aborted, because the SourceBuffer.abort() or SourceBuffer.remove() method is called while the SourceBuffer.appendBuffer() algorithm is still running. The updating property transitions from true to false. This event is fired before the updateend event.

Syntax

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

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

onabort = (event) => { }

Event type

A generic Event.

Examples

Aborting an append operation

This example demonstrates how to abort an append operation and handle the abort event.

const sourceBuffer = source.addSourceBuffer(mimeCodec);
sourceBuffer.addEventListener("abort", () => {
  downloadStatus.textContent = "Canceled";
});
sourceBuffer.addEventListener("update", () => {
  downloadStatus.textContent = "Done";
});
sourceBuffer.addEventListener("updateend", () => {
  source.endOfStream();
});
cancelButton.addEventListener("click", () => {
  if (sourceBuffer.updating) {
    sourceBuffer.abort();
  }
});
downloadStatus.textContent = "Downloading...";
fetch(assetURL)
  .then((response) => response.arrayBuffer())
  .then((data) => {
    downloadStatus.textContent = "Decoding...";
    sourceBuffer.appendBuffer(data);
  });