AI 编程工具xxxxxxxxxx<html><head><meta charset="utf-8"><title>高手教程(study.p2hp.com)</title></head><body><h1>Array.from()</h1><p>从字符串中生成一个数组:</p><p id="demo"></p><p><strong>注意:</strong> IE11 及其更早的浏览器版本不支持 from 方法。</p><script>var myArr = Array.from("RUNOOB");if(myArr instanceof Array) { document.getElementById("demo").innerHTML = myArr[0];} else { document.getElementById("demo").innerHTML = "该对象不是数组！";}</script></body></html>