Greasemonkey获取google搜索自动完成结果

// ==UserScript==
// @name         Google Autocomplete
// @namespace    http://example.com
// @version      1.0
// @description  Get Google autocomplete results
// @match        https://www.google.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // 监听搜索框的输入事件
    var searchInput = document.querySelector('input[name="q"]');
    searchInput.addEventListener('input', function() {
        var keyword = searchInput.value;

        // 发送请求获取自动完成结果
        var xhr = new XMLHttpRequest();
        xhr.open('GET', 'https://www.google.com/complete/search?q=' + keyword);
        xhr.onreadystatechange = function() {
            if (xhr.readyState === 4 && xhr.status === 200) {
                var response = JSON.parse(xhr.responseText);
                var autocompleteResults = response[1];

                // 处理自动完成结果
                console.log(autocompleteResults);
            }
        };
        xhr.send();
    });
})();