Ran into error while using summarization api

[Harsh Jain]

hello everyone,

I have been using summarization api and it was working fine but today i get this error while using it,

   TypeError: Cannot read properties of undefined (reading 'summarize')

const canSummarize = await ai.summarizer.capabilities();

    let summarizer;

    if (canSummarize && canSummarize.available !== "no") {

      summarizer = await ai.summarizer.create();

      if (canSummarize.available === 'readily') {

        // The summarizer can immediately be used.

        console.log("ready");

        summarizer = await ai.summarizer.create();

      } else {

        // The summarizer can be used after the model download.

        summarizer = await ai.summarizer.create();

        summarizer.addEventListener('downloadprogress', (e) => {

          console.log(e.loaded, e.total);

        });

        await summarizer.ready;

      }

   

    }

      const result = await summarizer.summarize(desc); ON THIS LINE

Kindly look into it.

Regards

Harsh

[Sebastian Benz]

Hey Harsh,

I'd recommend moving the line throwing the error two lines higher so that it's inside the if block. Otherwise, users whose browser doesn't support the API will always get the error. In your particular case, this might happen when you're running out of disk space and Chrome removes the model as a consequence. 

Hope that helps,

Sebastian

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[Thomas Steiner]

Hello Harsh,

I suggest you switch the flow as in the following snippet:

const options = {
  sharedContext: 'This is a scientific article',
  type: 'key-points',
  format: 'markdown',
  length: 'medium',
};

const available = (await self.ai.summarizer.capabilities()).available;
let summarizer;
if (available === 'no') {
  // The Summarizer API isn't usable.
  return;
}
if (available === 'readily') {
  // The Summarizer API can be used immediately .
  summarizer = await self.ai.summarizer.create(options);
} else {
  // The Summarizer API can be used after the model is downloaded.
  summarizer = await self.ai.summarizer.create(options);

  summarizer.addEventListener('downloadprogress', (e) => {
    console.log(e.loaded, e.total);
  });
  await summarizer.ready;
}

This makes sure the API is usable before trying to create the summarizer.

Cheers,

Tom

On Tue, Nov 26, 2024 at 11:32 AM Harsh Jain <jain.ris...@gmail.com> wrote:

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Google Germany GmbH, ABC-Str. 19, 20354 Hamburg, Germany

Geschäftsführer: Paul Manicle, Liana Sebastian
Registergericht und -nummer: Hamburg, HRB 86891

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