How to use each method within jQuery in a project
Jun 15, 2018 pm 03:40 PM
This time I will show you how to use the each method in jQuery in the project, and what are the precautions for using the each method in jQuery in the project. The following is a practical case, let's take a look.
Overview:
The each() method specifies a function to run for each matching element.
Returning false can be used to stop the loop early, equivalent to break.
Returning true can end this loop, which is equivalent to continue.
Syntax:
$(selector).each(function(index,element){?})
index?-?選擇器的?index?位置
element?-?當(dāng)前的元素（也可使用?"this"?選擇器）
$(selector).each(function(){?})
$.each(array,function(Key,Value){?})
1. Traverse the js array
$(function(){
?var?array=["aaa","bbb","ccc"];
?$.each(array,function(i,j){
??alert(i+":"+j); //i表示索引，j代表值
?});
})
2. Traverse the Object object
var?obj?=?new?Object();
obj.name="zs";
$.each(obj,?function(name,?value)?{
alert(this);??//this指向當(dāng)前屬性的值,等價(jià)于value
alert(name);??//name表示Object當(dāng)前屬性的名稱
alert(value);??//value表示Object當(dāng)前屬性的值
});
3. Traverse JSON objects
var?json?={"name":"zhangSan","role":"student"};
$.each(json,function(key,value){
?alert(key+":"+value);
});
4. Traverse an array composed of multiple JSON objects
var?json?=[{"name":"Amy","role":"student"},{"name":"Tom","role":"student"}];
$.each(json,?function(index,?value)?{
??alert("index="+index+"\n"?+"name:"+value.name+"\n"+"role:"+value.role+"\n");
});
5. Traverse jQuery objects
<head>
?? <meta charset="utf-8" />
??<title>遍歷jQuery對(duì)象</title>
??<script src="js/jquery-1.12.4.js"></script>
??<script type="text/javascript">
???$(function(){
????$("input[type='button']").bind("click",function(){
?????$("li").each(function(){
??????alert($(this).text())
??????});
????});
???});
??</script>
?</head>
?<body>
??<input type="button" value="觸發(fā)事件"/>
??<ul>
???<li>first</li>
???<li>second</li>
??</ul>
?</body>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
Recommended reading:
Angular CLI Angular 5 practical project demonstration
React rendering transformation on the server
The above is the detailed content of How to use each method within jQuery in a project. For more information, please follow other related articles on the PHP Chinese website!
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