What does the each() method in jQuery do?-JS Tutorial-php.cn

What does the each() method in jQuery do?

清浅

Release： 2018-12-13 09:11:21

Original

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The main function of each() method in jQuery is to loop through different data. We can use it to loop through multiple DOM objects from the same selector

What I will introduce to you today is the usage of each() function in jQuery, which allows us to loop through different data, such as arrays or objects. The each() function in jQuery is one of the most commonly used functions in jQuery. The following article will introduce the use of this method in detail.

【Recommended courses: jQuery Tutorial】

What does the each() method in jQuery do?

##The each() function in jQuery is used to loop data, similar to the for each loop. So we can use this to loop through multiple DOM objects from the same selector

each() method

Specifies the function to be run for each matching element.

$(selector).each(function(index,element))

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function(index,element): Specifies the function to be run for each matching element.

index: The index position of the selector, get the index value

element: The current element (the "this" selector can also be used)

When inside the each function , we can access the current element by using the this keyword, but this object is not a jQuery object

$("a").each(function(){
$(this);
})

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Get the current index of the loop

<body>
<ul>
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
	<li>5</li>
</ul>
<script src="jquery/jquery-1.12.4.js"></script>
<script>
	$(function(){
		$("li").each(function(i){
			console.log(i);
		})
	})
</script>
	</body>

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The result is as shown below:

What does the each() method in jQuery do?

Loop through an array:

You can use this to iterate through an array and get the index value and the value of the position in the array.

<script src="jquery/jquery-1.12.4.js"></script>
<script>
var array=[&#39;Chinese&#39;,&#39;Math&#39;,&#39;English&#39;]
	
$.each(array,function(index,value){
console.log(index+":"+value);
})
</script>

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The result is as shown below:

What does the each() method in jQuery do?

#Loop object:

You can use it to traverse the object and get the index value and position in the object.

<script src="jquery/jquery-1.12.4.js"></script>
<script>
	var obj={
	name:"张三",
	age:"18",
	subject:"English"
};
$.each(obj,function(index,value){
console.log("信息："+index+":"+value);
		})

</script>

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The results are as follows:

What does the each() method in jQuery do?

Summary: The above is the entire content of this article. I hope that this article can make everyone understand Have a certain understanding of each() method in jQuery.

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