How to change the attribute value of img in jquery-Front-end Q&A-php.cn

How to change the attribute value of img in jquery

青灯夜游

Release： 2022-05-25 15:30:40

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Two ways to change: 1. Use attr() to modify the attribute value, the syntax is "$("img").attr({Attribute 1: "value", Attribute 2: "value"...} );". 2. Use prop() to modify the attribute value, the syntax is "$("img").prop({Attribute 1: "Value", Attribute 2: "Value"...});".

How to change the attribute value of img in jquery

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer. The

How to change the attribute value of img in jquery tag defines an image in an HTML page.

<img src="img/1.jpg" alt="多肉" width="200">

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How to change the attribute value of img in jquery

How to change the attribute value of img in jquery tags have two required attributes: src and alt. (The attributes supported by the img tag can be viewed below)

So how to change the attribute value of img using jquery? The following introduces two methods of modifying element attributes.

Method 1: Use attr() to modify the attribute value

Modification syntax:

//单个属性
$("img").attr("属性名","属性值");

//多个个属性
$("img").attr({属性1:"属性值",属性2:"属性值"....});

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Example: Modify the width and height attributes

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<script src="js/jquery-1.10.2.min.js"></script>
		<script>
			$(document).ready(function() {
					$("button").click(function() {
						$("img").attr({width:"400",height":"320"});
					});
			});
		</script>
	</head>

	<body>
		<img src="img/1.jpg" alt="多肉" width="200"    style="max-width:90%"><br><br>
		<button>修改width和height属性值</button>
	</body>

</html>

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How to change the attribute value of img in jquery

Method 2: Use prop() to modify attribute values 

Modify syntax:

//单个属性
$("img").prop("属性名","属性值");
//多个个属性
$("img").prop({属性1:"属性值",属性2:"属性值"....});

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Example : Modify src and alt attributes

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<script src="js/jquery-1.10.2.min.js"></script>
		<script>
			$(document).ready(function() {
					$("button").click(function() {
						$("img").prop({src:"img/4.jpg",alt:"晚霞"});
					});
			});
		</script>
	</head>

	<body>
		<img src="img/1.jpg" alt="多肉" width="300"><br><br>
		<button>修改src和alt属性</button>
	</body>

</html>

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How to change the attribute value of img in jquery

Extended knowledge: Attributes that can be set

srcSpecifies the URL to display the image. usemap Defines the image as a client-side image map. vspacewidthSpecifies the width of the image.

Attribute	Value	Description
align	top bottom middle left right	HTML5 is not supported. HTML 4.01 is deprecated. Specifies how images are arranged relative to surrounding text.
loading	eager: Load immediately lazy: Lazy loading	Specifies whether the browser should load the image immediately or lazily.
alt	text	Specifies the alternative text for the image.
border	pixels	HTML5 Not supported. HTML 4.01 is deprecated. Specifies the border around the image.
crossorigin	anonymous use-credentials	Set the cross-domain attributes of the image
height	pixels	Specify the image's high.
hspace	pixels	HTML5 Not supported. HTML 4.01 is deprecated. Specifies the margins on the left and right sides of the image.
ismap	ismap	Specifies the image as a server-side image map.
longdesc	URL	##HTML5 Not supported. HTML 4.01 is deprecated. Points to a URL that contains a long image description document.
	URL
	#mapname
	pixels	HTML5 Not supported. HTML 4.01 is deprecated. Specifies the margin at the top and bottom of the image.
	pixels

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