jquery delete a tag

JQuery is a popular JavaScript library used to simplify the presentation of HTML documents, document shuttle, animation, event handling and many other aspects. In web page production, it is often necessary to delete a certain tag. Here are several ways to use JQuery to delete tags under different circumstances.

Method 1: Directly delete a tag

Assume that the tag to be deleted has the id attribute 'example':

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

This JQuery statement will directly delete the tag with the id attribute' example' tag is removed from the web page. Here, the remove method is a shortcut method of JQuery, which can delete an element and all its child elements.

Method 2: Delete the sub-elements of a certain tag

If you want to delete the sub-elements of a certain tag while retaining the tag itself, you can use the empty() method:

$('#example').empty();

This JQuery statement will delete all child elements of the tag with the id attribute 'example' without deleting the tag itself.

Method 3: Delete a sub-element of a certain tag

Suppose the tag to be deleted has the id attribute 'example', and one of the sub-elements with the class attribute 'child' needs to be deleted :

$('#example .child').remove();

This JQuery statement will delete all elements with the class attribute 'child' in the tag with the id attribute 'example', that is, delete all qualified child elements in the tag.

Method 4: Delete the sub-elements from subscript start to subscript end in a tag

Assume that the tag to be deleted has the id attribute 'example', and it is to be deleted or retained The child elements from subscript start to subscript end:

//删除操作
$('#example').children().slice(start, end+1).remove();
//保留操作
$('#example').children().not(':lt('+start+')').not(':gt('+end+')').remove();

This JQuery statement will use the slice() and not() methods respectively to delete or retain the tag with the id attribute 'example' Child elements whose subscripts are in the range [start, end]. It should be noted that using ':lt()' in the not() method means selecting elements with a subscript less than a certain value, and using ':gt()' in the not() method means selecting elements with a subscript greater than a certain value. Elements.

Method 5: Delete a row of a table

Suppose you want to delete the second row in the table 'table':

$('#table tr:eq(2)').remove();

This JQuery statement will delete the row in the table Line 2 of data, where ':eq()' means selecting the element with the specified subscript.

Method 6: Delete all sub-elements in a certain DIV, but not delete the DIV itself

Suppose you want to delete all sub-elements in the DIV object 'example':

$('#example').children().remove();

This JQuery statement will delete all child elements in the DIV object, but not the DIV itself.

Summary

The above is the method of using JQuery to delete a certain tag. Choose different methods to operate under different circumstances. You can quickly and easily delete web page tags, so that our Web page production is more flexible.

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