要在用户完成键入后触发JavaScript函数，请尝试运行以下代码-
<html>
<body>
<script>
var timer = null;
$("#myText").keydown(function(){
clearTimeout(timer);
timer = setTimeout(doStuff, 1000)
});
function doStuff() {
alert("写更多！");
}
</script>
<input type = "text" id = "myText" />
</body>
</html>