jQuery - Get content and attributes
jQuery DOM operation
A very important part of jQuery is the ability to operate DOM.
jQuery provides a set of DOM-related methods that make it easy to access and manipulate elements and attributes.
Three simple and practical jQuery methods for DOM operations:
text() - Set or return The text content of the selected element
html() - Sets or returns the content of the selected element (including HTML tags)
val() - Set or return the value of a form field
Demonstrate how to get content through jQuery text() and html() methods:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("#btn1").click(function(){
alert("Text: " + $("#test").text());
});
$("#btn2").click(function(){
alert("HTML: " + $("#test").html());
});
});
</script>
</head>
<body>
<p id="test">這是段落中的 <b>粗體</b> 文本。</p>
<button id="btn1">顯示文本</button>
<button id="btn2">顯示 HTML</button>
</body>
</html>Demo How to get the value of the input field through the jQuery val() method:
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
alert("值為: " + $("#test").val());
});
});
</script>
</head>
<body>
<p>名稱(chēng): <input type="text" id="test" value="php中文網(wǎng)"></p>
<button>顯示值</button>
</body>
</html>attr() attribute
jQuery attr() method is used to get the attribute value.
Demonstrate how to get the value of the href attribute in the link:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(){
alert($("#php").attr("href"));
});
});
</script>
</head>
<body>
<p><a href="http://miracleart.cn" id="php">php中文網(wǎng)</a></p>
<button>顯示 href 屬性的值</button>
</body>
</html>
