jquery delete element id

In front-end development, it is often necessary to dynamically add and delete elements. When we want to delete a specified element, jQuery provides a very convenient operation method.

1. Basic syntax for deleting elements

Through jQuery's selector, we can get the element that needs to be deleted, and then call the remove() method.

$("#element-id").remove();

Among them, #element-id refers to the id selector of the element that needs to be deleted.

2. Notes on deleting elements

1. Deleting an element will also automatically delete all its child nodes and bound events.
2. When you delete an element from the page, you do not need to manually delete the reference to the element in the memory again, because even if the element is deleted, the browser's garbage collection mechanism will automatically reclaim the memory space occupied by the element. .
3. If the element to be deleted does not exist, the operation will have no effect and no error will be reported.
4. If there are multiple elements with the same id in the page, only one of them can be deleted. Because ids should be unique, multiple elements sharing the same id can easily cause confusion.

3. Sample code for deleting elements

HTML code:

<div id="container">
  <div id="box1">箱子1</div>
  <div id="box2">箱子2</div>
  <div id="box3">箱子3</div>
</div>

JS code:

// 删除id为box2的元素
$("#box2").remove();

The above code will delete the element with the id of box2 element, the effect is as follows:

<div id="container">
  <div id="box1">箱子1</div>
  <div id="box3">箱子3</div>
</div>

Summary:

Through jQuery's remove() method, we can easily delete elements on the page. When deleting elements, you need to pay attention to using the id selector to specify the element that needs to be deleted, and at the same time, ensure that the id is unique in the page. In addition, deleting elements does not require manual clearing of references in memory and does not cause memory leaks.

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