Summarizes a text using built-in Chrome AI LLM -- Gemini Nano

summarize.tampermonkey.js

// ==UserScript==
// @name         Summarize Script
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Summarize page
// @author       Volkan Unsal
// @match        *://*/*
// @grant        GM_registerMenuCommand
// ==/UserScript==

(function() {
    'use strict';

    function injectModule(src) {
        var scriptId = src.split('/').pop().split('.').shift();
        if (document.getElementById(scriptId)) {
            return;
        }
        var script = document.createElement('script');
        script.id = scriptId;
        script.src = src;
        return new Promise(resolve => {
            document.head.appendChild(script);
            script.onload = resolve;
        })

    }

    function runFastBookmark() {
        var documentClone = document.cloneNode(true);
        injectModule('https://cdn.jsdelivr.net/npm/@mozilla/[email protected]/Readability.min.js').then(() => {
            let article = new Readability(documentClone).parse();
            ai.summarizer.create({ type: 'tl;dr', format: 'plain-text' }).then(a => {
                a.summarize(article.textContent.slice(0, 2000)).then(summary => {
                    console.log(summary);
                });
            });
        })


    }

    // Add a menu button to trigger the script
    GM_registerMenuCommand('Run Summarizer', runFastBookmark);
})();