<input type="week" id="myWeek">

<p>点击按钮返回 week 字段的表单元素类型</p>

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

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

<script>

function myFunction() {

    var x = document.getElementById("myWeek").type;

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

}

</script>

​