Write a program
Create an html page, introduce the jQuery class library and write the following code:
<!doctype html>
<html lang="zh">
<head>
<meta charset="utf-8"/>
<title>Hello World jQuery!</title>
<script src="http://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body>
<div id="divMsg">Hello jQuery!</div>
<input id="btnShow" type="button" value="show" />
<input id="btnHide" type="button" value="hidden" /><br/>
<input id="btnChange" type="button" value="change content is Hello World, too!"/>
<script>
$("#btnShow").bind("click", function(event) {
$("#divMsg").show();
});
$("#btnHide").bind("click", function(event) {
$("#divMsg").hide();
});
$("#btnChange").bind("click", function(event) {
$("#divMsg").html("Hello World, too!");
});
</script>
</body>
</html>The effect is as follows:
There are three buttons on the page, which respectively control the display, hiding and modifying the content of Hello World.
This example uses:
(1) jQuery ID selector: $("#btnShow") (2) Event binding function: bind() (3) Show and hide Functions: show() and hide() (4) Function to modify the html inside the element: html()
Next Section