jquery removes a dom

jQuery is one of the most popular JavaScript libraries, and its official website is http://jquery.com. It can easily manipulate HTML DOM, saving developers a lot of time and energy. One common operation is to remove a DOM element. This article will show you how to remove a DOM element using jQuery.

1. Use the remove() method

jQuery provides the remove() method, which can directly delete selected elements from the DOM. For example, the following code can delete all elements with class "test" from the DOM:

$(".test").remove();

Here $ is a function used to query elements that meet the conditions. $(".test") means to select all elements with class "test". After calling the remove() method, these elements will be removed from the DOM.

2. Use the detach() method

The remove() method can remove elements from the DOM, but it will not save the data and event handlers of the deleted elements. If you need to reinsert a deleted element, you may want to use the detach() method.

Similar to the remove() method, the detach() method can also choose to delete specified elements, for example:

var detachedElement = $(".test").detach();

In this example, all elements with class "test" are selected. Save them to the detachedElement variable and delete them from the DOM.

Next, you can reinsert the element like this:

$("body").append(detachedElement);

In this example, select the body element and insert the detachedElement element into it.

This example shows how to use the detach() method to remove elements and retain them for subsequent operations.

3. Use the empty() method

If you don’t want to delete the entire element, but need to clear the content of the element, you can use the empty() method.

$(".test").empty();

In this example, the contents of all elements with class "test" will be cleared. The element itself will remain in the DOM.

4. Use the unwrap() method

If you want to delete an element and its contained elements at the same time, you can use the unwrap() method.

$(".test").unwrap()

In this example, all elements with class "test" will be deleted, and the elements contained in these elements will also be deleted from the DOM. Similar to the remove() method, it does not save the removed element's data and event handlers.

Summary

The above introduces four methods of removing DOM elements in jQuery. The remove() method can directly delete the selected element, which is very useful when deleting elements; the detach() method can delete elements and save their data and event handlers for subsequent operations; the empty() method can clear the content of the element Without removing the element itself; the unwrap() method removes the element and its contained elements. Choosing different methods based on specific needs can make your code more concise and efficient.

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