Delete specified elements using jquery

In web development, it is often necessary to delete specific elements in order to dynamically update the page. Normally this is easily achieved using jQuery. This article will introduce how to use jQuery to delete specified elements, making you more efficient in web development.

1. jQuery Selector

jQuery selector is a powerful tool for selecting specified elements from a document. Selectors are used to find specific elements so that they can be manipulated.

The syntax of the jQuery selector is as follows:

$(selector).action()

Among them,$is the keyword of jQuery, andselectoris the element to be selected. The selector can be a tag name, class name, id, etc.

Common jQuery selectors are:

• Tag selector:$("tag name")
• Class selector:$(".Class name")
• id selector:$("#id name")
• Attribute selector:$("[Attribute name=Attribute value]")
• Multiple selectors:$("Selector 1, Selector 2, Selector 3")

2. jQuery delete element

After selecting an element through the selector, you can use the.remove()method in jQuery to delete it.

For example, if you want to delete an element with the IDexample, the code is as follows:

$("#example").remove();

In the above code,$("#example")The selector selects the element,.remove()deletes the element.

If you want to delete multiple elements, you can use thejQuery.each()method.

For example, if you want to delete all elements with classexample, the code is as follows:

$(".example").each(function() { $(this).remove(); });

In the above code,$(".example")The selector selects all elements with classexample, the.each()method loops through each element and deletes it using$(this).remove()every element.

In addition, due to the chain operation characteristics of jQuery, you can use the.end()method to return to the element selected by the selector.

For example, if you want to delete the parent element of an element with classexample, the code is as follows:

$(".example").parent().remove();

In the above code,$(".example" )The selector selects the element, uses the.parent()method to select the parent element of the element, and then uses the.remove()method to delete the parent element.

3. Summary

By using the jQuery selector and the.remove()method, deleting specified elements becomes very simple.

Before removing elements, be sure to check whether they have any impact on the page and make sure that their removal will not cause unnecessary problems.

In web development, using jQuery to delete elements can help us easily change the page layout and content, thus improving development efficiency.

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