Analysis of three usage examples of Jquery-data

This article mainly introduces three uses of Jquery-data. Has very good reference value. Let's take a look with the editor below, I hope it can help everyone.

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The use of Jquery-data:

jQuery-data is mainly used to store data and help ordinary objects or jQuery objects to store Data, in fact, if you simply store a single attribute of the dom, it is enough to use attr custom attributes; if you store multiple key-value pairs, it is recommended to use jQuery-data;

For example: Many plug-ins use this for lazy loading of images. When it comes to jquery-data, first store the real address of the picture in jquery-data, make a monitoring event, and then take out the real address when you slide to the picture;

Usage 1: Give to ordinary people The object stores a single attribute and value

 var obj = {}; $.data(obj, 'name', 'xm'); // 赋值 var str = $.data(obj, 'name'); // 读取值 console.log(str) // "xm"

Usage 2: Store multiple attributes and values for ordinary objects

 var obj = {}; $.data(obj,{name1:"xm",name2:"xh"}); // 赋值 var str1 = $.data(obj, 'name1'); // 读取值 var str2 = $.data(obj, 'name2'); // 读取值 console.log(str1) // "xm" console.log(str1) // "xh"

Usage 3: Assign value to Jquery dom object

  var obj = $('.demo'); $.data(obj,{name1:"xm",name2:"xh"}); // 赋值 var str1 = $.data(obj, 'name1'); // 读取值 var str2 = $.data(obj, 'name2'); // 读取值 console.log(str1) // "xm" console.log(str1) // "xh" // 就是把obj换成jquery对象这么简单

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