jquery delete specified column

With the popularity of jQuery, it is becoming more and more convenient for us to use jQuery to complete web development work. In web tables, we often encounter times when we need to perform operations on specified columns, which involves deleting specified columns. Below, I will share with you how to use jQuery to delete specified columns.

Use jQuery to select the specified column

Before deleting the specified column, we need to select the target column first. jQuery's options are very flexible, and we can choose different options to complete the operation according to different actual needs. Here are some selectors that may be used:

1. nth-child

This selector selects child elements based on the position of the current element. If we want to select a certain column, we can select the th element of the table header, and then use the nth-child method to easily find the td element of the corresponding column. The method is as follows:

//删除第二列
$("tr td:nth-child(2)").remove();

nth-child specifies the sub-element, not the corresponding content. The 2 here means that the element corresponding to the second column is deleted.

2. eq

Use the eq method to select elements that match the specified index position in an option set. This method index starts from 0. For example:

//删除第二列
$("tr td").eq(1).remove();

The 1 here represents the position of the second column, similar to the nth-child method. Note that the eq method starts counting index positions from 0.

3. filter

Filters unwanted elements in an options collection. Filtering methods can operate using custom functions or rules represented by selectors. For example:

//删除第二列
$("tr td").filter(":nth-child(2)").remove()

In this example, the filter method is used to select the columns that need to be deleted. It can be found that the params parameter can use any valid jQuery selector method, and the effect is the same as nth-child.

Delete the selected column

After selecting the column that needs to be deleted, we will perform the deletion next. jQuery's remove method can easily complete this operation.

//删除第二列
$("tr td:nth-child(2)").remove();
或者
$("tr td").eq(1).remove();
或者
$("tr td").filter(":nth-child(2)").remove();

These three methods all select the second column, so we can delete them directly when executing the remove method:

$("tr td:nth-child(2)").remove();

In this way, the specified column is permanently deleted , will no longer appear on the page.

Summary

By using jQuery’s selector method, we can easily select the columns that need to be deleted. At the same time, jQuery's remove method also allows us to complete the deletion operation more conveniently. I hope this article can help front-end engineers improve their efficiency in actual work and demonstrate better work capabilities.

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