使用oninput 事件属性在元素获取用户输入时触发。您可以尝试运行以下代码以实现oninput 属性-
<!DOCTYPE html>
<html>
<body>
<p>Write your name below:</p>
<input type = "text" id = "myid" oninput="display()">
<p id="test"></p>
<script>
function display() {
var p = document.getElementById("myid").value;
document.getElementById("test").innerHTML = "Your answer is " + p;
}
</script>
</body>
</html>