Can jquery add attributes to images?-Front-end Q&A-php.cn

Can jquery add attributes to images?

青灯夜游

Release： 2022-05-16 17:48:53

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jquery can add attributes to images. Two ways to add: 1. Use attr() to add attributes to the img element, the syntax is "$("img").attr("attribute name", "value")"; 2. Use prop() to add attributes to the picture element , the syntax is "$("img").prop("property name","value")".

Can jquery add attributes to images?

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

There are two methods in jquery for setting attributes

attr()
prop()

1. Use the attr()

attr() method to set or return the attributes and values of the selected element.

When this method is used to set attribute values, one or more attribute/value pairs are set for the matching element.

$("img").attr("属性名","属性值");

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Example:

<!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("align","right");
				});
			});
		</script>
	</head>
	<body>
		<img  src="img/1.jpg"    style="max-width:90%" alt="Can jquery add attributes to images?" ><br>
		<br><br>
		<button>给图片添加align属性，设置右对齐</button>
	</body>
</html>

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Can jquery add attributes to images?

2. Use prop()

prop() method and attr( ), also sets or returns the properties and values of the selected element.

When this method is used to set attribute values, one or more attribute/value pairs are set for the set of matching elements.

Grammar:

$("img").prop("属性名","属性值");

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Example:

<!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("alt","图像的替代文本");
				});
			});
		</script>
	</head>
	<body>
		<img  src="img/1.jpg"    style="max-width:90%" alt="Can jquery add attributes to images?" ><br>
		<br><br>
		<button>给图片添加alt属性</button>
	</body>
</html>

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Can jquery add attributes to images?

##Extended knowledge: Picture element img## The # Can jquery add attributes to images? tag defines an image in an HTML page.

Can jquery add attributes to images? tags have two required attributes: src and alt.

Can jquery add attributes to images? Tag attributes:

##AttributeValueDescriptionaligntopmiddle Specifies how images are arranged relative to surrounding text. loadingeager: Load immediately altborder Specifies the border around the image. crossoriginanonymous heighthspace Specifies the margins on the left and right sides of the image. ismapismap Specifies the image as a server-side image map. longdescURL#mapnamepixelspixels[Recommended learning: jQuery video tutorial,


bottom	left right HTML5 Not supported. HTML 4.01 is deprecated.
lazy: Lazy loading	Specifies whether the browser should load images immediately or lazily.
text	Specifies the alternative text for the image.
pixels	HTML5 Not supported. HTML 4.01 is deprecated.
use-credentials	Set the cross-domain attributes of the image
pixels	Specify the image's high.
pixels	HTML5 Not supported. HTML 4.01 is deprecated.

URL	##HTML5 Not supported. HTML 4.01 is deprecated. Points to a URL that contains a long image description document.	src
	Specifies the URL to display the image.	usemap
	Defines the image as a client-side image map.	vspace
	HTML5 Not supported. HTML 4.01 is deprecated. Specifies the margin at the top and bottom of the image.	width
	Specifies the width of the image.

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