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Summarizer - Web APIs | MDN

Summarizer

Limited availability

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The Summarizer interface of the Summarizer API contains all the functionality for this API, including checking AI model availability, creating a new Summarizer instance, using it to generate a new summary, and more.

Instance properties
expectedContextLanguages Read only Experimental

The languages the context strings should be written in.

expectedInputLanguages Read only Experimental

The languages the Summarizer should support.

format Read only Experimental

The text format summaries will be returned in.

inputQuota Read only Experimental

The input quota available to the browser for generating summaries.

length Read only Experimental

The relative length of the generated summaries.

outputLanguage Read only Experimental

The language the summary should be generated in.

A text string describing the context the pieces of text to summarize are being used in, which helps the Summarizer generate more suitable summaries.

type Read only Experimental

The type of summary that will generated by the Summarizer.

Static methods
availability() Experimental

Returns an enumerated value that indicates whether the browser AI model supports a given Summarizer configuration.

create() Experimental

Creates a new Summarizer instance from which to generate summaries.

Instance methods
destroy() Experimental

Destroys the Summarizer instance it is called on.

measureInputUsage() Experimental

Reports how much input quota would be used by a summarize operation for a given text input.

summarize() Experimental

Generates a new summary string.

summarizeStreaming() Experimental

Generates a new summary as a ReadableStream.

Examples

See Using the Summarizer API for a complete example.

Creating a Summarizer instance
const summarizer = await Summarizer.create({
  sharedContext:
    "A general summary to help a user decide if the text is worth reading",
  type: "tldr",
  length: "short",
  format: "markdown",
  expectedInputLanguages: ["en-US"],
  outputLanguage: "en-US",
});
Generating a summary
const summary = await summarizer.summarize(myTextString);
console.log(summary);
Generating a summary stream
const stream = summarizer.summarizeStreaming(myTextString);
let summary = "";

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

console.log("Stream complete");
summaryOutput.textContent = summary;
Specifications Browser compatibility See also

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