TransformStreamDefaultController: error() method

Available in workers

The error() method of the TransformStreamDefaultController interface errors both sides of the stream. Any further interactions with it will fail with the given error message, and any chunks in the queue will be discarded.

Syntax

error(reason)

Parameters

• reason
  • : A string containing the error message to be returned on any further interaction with the stream.

Return value

None (undefined).

Examples

In this example the error() method is used when a chunk could not be transformed.

const transformContent = {
  start() {
    /* … */
  },
  async transform(chunk, controller) {
    try {
      chunk = await applyMyTransformation(chunk);
    } catch (err) {
      controller.error(`Unable to transform chunk: ${err}`);
    }
    // …
  },
  // …
};

Specifications

Browser compatibility