查找: <input type="search" id="mySearch" autofocus>

<p>点击按钮查看搜索字段在页面加载后是否自动获取焦点</p>

<button onclick="myFunction()">点我</button>

<p id="demo"></p>

<script>

function myFunction() {

    var x = document.getElementById("mySearch").autofocus;

    document.getElementById("demo").innerHTML = x;

}

</script>

​