验证

var ajax = new XMLHttpRequest(); ajax.open('post', 'juejin.cn/web/user/up…', true); ajax.setRequestHeader('content-type', 'application/x-www-form-urlencoded'); // 注意：这里把双引号 "..." 改成了单引号 '...' ajax.send('aid=2608&avatar=cdn.pixabay.com/animation/2…'); ajax.onreadystatechange = function () { if (ajax.readyState == 4 && ajax.status == 200) { console.log("修改结果：" + ajax.responseText); alert("代码已运行，请检查控制台输出或刷新页面查看头像"); } }