JavaScript演示如何访问Search字段？
<!DOCTYPE html>
<html>
<body>
<h3>演示如何访问Search字段</h3>
<input type="search" placeholder="搜索..">
<p>点击按钮来获得 search 字段的占位符文本。</p>
<button onclick="myFunction()">试一下</button>
<p ></p>
<p ></p>
<script>
function myFunction() {
var x = document.getElementById("mySearch").placeholder;
document.getElementById("demo1").innerHTML = x;
var y = document.getElementById("mySearch").value;
document.getElementById("demo2").innerHTML = y;
}
</script>
</body>
</html>