How to get child elements in jquery

When using jQuery to perform DOM operations, it is often necessary to obtain the child elements of an element for the next step. This article will explain in detail how to use jQuery to get child elements.

1. jQuery child element selector

In jQuery, you can use the child element selector to obtain child elements. The child element selector uses the symbol ">", which selects the direct child elements of an element.

For example, you can use the following code to obtain all direct child elements of the element with the id of parent:

$("#parent > *")

where the symbol "*" represents all elements.

If you want to get the element whose class is child among the direct child elements with the id of the parent element, you can use the following code:

$("#parent > .child")

Among them, "." represents the class selector.

2. jQuery sub-element traversal methods

jQuery provides a series of methods to traverse the sub-elements of an element.

1. children()

children() method returns all direct child elements of the specified element. It does not return all descendant elements.

For example, the following code can return all direct child elements of all elements with the id of parent:

$("#parent").children()

If you want to get the class of child elements in the direct child elements with the id of the parent element Element, you can use the following code:

$("#parent").children(".child")

2. find()

find() method returns the descendant elements of the specified element. It returns all descendant elements of the specified element, not just direct children.

For example, the following code can return all descendant elements with class child in the element with id parent:

$("#parent").find(".child")

3. #next()

next () method returns the next sibling element of the given element. If there is no next sibling element, an empty jQuery object is returned.

For example, the following code can return the next sibling element of the element whose id is parent:

$("#parent").next()

4. prev()

prev() method Returns the previous sibling of the given element. If there is no previous sibling element, an empty jQuery object is returned.

For example, the following code can return the previous sibling element of the element with the id of parent:

$("#parent").prev()

5. siblings()

siblings() method Returns all siblings of the specified element. Sibling elements are all elements that have the same parent element as the specified element.

For example, the following code can return all sibling elements of the element whose id is parent:

$("#parent").siblings()

6. first()

first() method returns The first child element of the specified element.

For example, the following code can return the first child element of the element with the id of parent:

$("#parent").children().first()

7. last()

last() Method returns the last child element of the specified element.

For example, the following code can return the last child element of the element with the id of parent:

$("#parent").children().last()

3. Sample code

The following is a simple sample code, using To explain how to use jQuery to get child elements:

    
    
    


    

        
子元素1
        
子元素2
        
子元素3
    

    

The above is the method and sample code on how to use jQuery to get child elements. When you need to operate on sub-elements, please choose the appropriate method based on the actual situation.

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