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Summarizer: summarizeStreaming() method

files/en-us/web/api/summarizer/summarizestreaming/index.md

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{{APIRef("Summarizer API")}}{{SeeCompatTable}}{{securecontext_header}}

The summarizeStreaming() method of the {{domxref("Summarizer")}} interface generates a new summary as a {{domxref("ReadableStream")}}.

Syntax

js-nolint
summarizeStreaming(input)
summarizeStreaming(input, options)

Parameters

  • input
    • : A string representing the text to be summarized.
  • options {{optional_inline}}
    • : An object specifying configuration options for the summarizeStreaming() operation. Possible values include:
      • context
        • : A string describing the context the input text is being used in, which helps the Summarizer generate a more suitable summary.
      • signal
        • : An {{domxref("AbortSignal")}} object instance, which allows the summarizeStreaming() operation to be aborted via the associated {{domxref("AbortController")}}.

Return value

A {{domxref("ReadableStream")}} containing the generated summary.

Exceptions

  • AbortError {{domxref("DOMException")}}
    • : Thrown if the Summarizer was previously destroyed (had {{domxref("Summarizer.destroy()")}} called on it, or was aborted via its abort signal after creation).
  • InvalidStateError {{domxref("DOMException")}}
    • : Thrown if the current {{domxref("Document")}} is not active.
  • NotAllowedError {{domxref("DOMException")}}
    • : Thrown if usage of the Summarizer API is blocked by a {{httpheader('Permissions-Policy/summarizer','summarizer')}} {{httpheader("Permissions-Policy")}}.
  • NotReadableError {{domxref("DOMException")}}
    • : Thrown if the output summary was filtered by the user agent, for example because it was detected to be harmful, inaccurate, or nonsensical.
  • NotSupportedError {{domxref("DOMException")}}
    • : Thrown if the provided context is not in language the Summarizer supports.
  • {{domxref("QuotaExceededError")}}
    • : Thrown if the summarize operation exceeds the available {{domxref("Summarizer.inputQuota", "inputQuota")}}.
  • UnknownError {{domxref("DOMException")}}
    • : Thrown if the summarizeStreaming() call failed for any other reason, or a reason the user agent did not wish to disclose.

Examples

Basic summarizeStreaming() usage

js
const summarizer = await Summarizer.create({
  sharedContext:
    "A general summary to help a user decide if the text is worth reading",
  type: "tldr",
  length: "short",
});

const stream = summarizer.summarizeStreaming(myTextString);
let summary = "";

for await (const chunk of stream) {
  summary += chunk;
}

console.log("Stream complete");
summaryOutput.textContent = summary;

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also