Loại bỏ trong JavaScript là gì?

Tương tự như .empty(), phương thức .remove() đưa các phần tử ra khỏi DOM. Sử dụng .remove() khi bạn muốn xóa chính phần tử đó, cũng như mọi thứ bên trong nó. Ngoài bản thân các phần tử, tất cả các sự kiện ràng buộc và dữ liệu jQuery được liên kết với các phần tử đều bị xóa. Để xóa các thành phần mà không xóa dữ liệu và sự kiện, hãy sử dụng

$( ".hello" ).remove();

0 thay thế

Hãy xem xét HTML sau

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<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

Chúng tôi có thể nhắm mục tiêu bất kỳ yếu tố nào để loại bỏ

1

$( ".hello" ).remove();

Điều này sẽ dẫn đến cấu trúc DOM với phần tử

$( ".hello" ).remove();

1 bị xóa

1

2

3

<div class="container">

<div class="goodbye">Goodbyediv>

div>

Nếu chúng ta có bất kỳ số lượng phần tử lồng nhau nào bên trong

$( ".hello" ).remove();

2, thì chúng cũng sẽ bị xóa. Các cấu trúc jQuery khác như dữ liệu hoặc trình xử lý sự kiện cũng bị xóa

Chúng tôi cũng có thể bao gồm một bộ chọn làm tham số tùy chọn. Ví dụ: chúng ta có thể viết lại mã xóa DOM trước đó như sau

Đưa ra một phần tử HTML và nhiệm vụ là xóa phần tử HTML khỏi tài liệu bằng JavaScript.  

Tiếp cận

  • Chọn phần tử HTML cần xóa
  • Sử dụng phương thức JavaScript remove() và removeChild() để xóa phần tử khỏi tài liệu HTML

ví dụ 1. Ví dụ này sử dụng phương thức removeChild() để xóa phần tử HTML.  

html




<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

0

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

1

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

3

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

0

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

5

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

7

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

0

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

00

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

03

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

05

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

7

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

07

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

00

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

10

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

7____10

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

13

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

16

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

17

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

18

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

17

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

20

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

17

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

22

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

17

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

24

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

17

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

26

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

28

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

7

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

07

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

13

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

_______13____107____15____12

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

37

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

3_______10

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

00

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

13

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

03

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

2

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

10

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

7__

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

0

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

08

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

13

<div class="container">

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<div class="goodbye">Goodbyediv>

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02

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

51

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<div class="goodbye">Goodbyediv>

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2

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<div class="goodbye">Goodbyediv>

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02

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<div class="goodbye">Goodbyediv>

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54

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<div class="goodbye">Goodbyediv>

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7

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<div class="goodbye">Goodbyediv>

div>

07

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

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08

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<div class="goodbye">Goodbyediv>

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2

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<div class="goodbye">Goodbyediv>

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10

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<div class="goodbye">Goodbyediv>

div>

7__

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

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0

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<div class="goodbye">Goodbyediv>

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22

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<div class="goodbye">Goodbyediv>

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23

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02

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<div class="goodbye">Goodbyediv>

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25

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<div class="goodbye">Goodbyediv>

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13

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<div class="goodbye">Goodbyediv>

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02

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<div class="goodbye">Goodbyediv>

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02

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<div class="goodbye">Goodbyediv>

div>

29

<div class="container">

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<div class="goodbye">Goodbyediv>

div>

2

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<div class="goodbye">Goodbyediv>

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7

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<div class="goodbye">Goodbyediv>

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07

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<div class="goodbye">Goodbyediv>

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22

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2

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10

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7__

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<div class="goodbye">Goodbyediv>

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0

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<div class="goodbye">Goodbyediv>

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78

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23

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02

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01

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<div class="goodbye">Goodbyediv>

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2

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<div class="goodbye">Goodbyediv>

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02

<div class="container">

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<div class="goodbye">Goodbyediv>

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04

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7

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07

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78

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2

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<div class="goodbye">Goodbyediv>

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7____10

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

001____12

<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

10

<div class="container">

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<div class="goodbye">Goodbyediv>

div>

7__

<div class="container">

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0

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006

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007

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02

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009

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2

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02

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012

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7

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07

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006

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10

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7__

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0

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22

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23

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02

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023

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13

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02

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02

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027

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2

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7

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07

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22

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10

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7____1035

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div>

7____10

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038

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2

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02

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041

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02

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043

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045

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02

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047

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048

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050

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17

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052

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17

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28

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1

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067

đầu ra

Loại bỏ trong JavaScript là gì?

Xóa một phần tử HTML

ví dụ 2. Ví dụ này sử dụng phương thức remove() để xóa phần tử HTML khỏi tài liệu.  

html




<div class="container">

<div class="hello">Hellodiv>

<div class="goodbye">Goodbyediv>

div>

0

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1

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07

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027

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220

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đầu ra

Loại bỏ trong JavaScript là gì?

Xóa một phần tử HTML

JavaScript được biết đến nhiều nhất để phát triển trang web nhưng nó cũng được sử dụng trong nhiều môi trường không có trình duyệt. Bạn có thể học JavaScript từ đầu bằng cách làm theo Hướng dẫn JavaScript và Ví dụ về JavaScript này

Có chức năng xóa trong JavaScript không?

Chọn phương thức remove() . Mẹo. Để thêm một tùy chọn vào danh sách thả xuống, hãy sử dụng phương thức add(). The remove() method is used to remove an option from a drop-down list. Tip: To add an option to a drop-down list, use the add() method.

Làm cách nào để xóa đối tượng trong JavaScript?

Xóa Thuộc tính khỏi Đối tượng . Sau khi xóa, tài sản không thể được sử dụng trước khi nó được thêm lại. Toán tử xóa được thiết kế để sử dụng trên các thuộc tính đối tượng. Nó không ảnh hưởng đến các biến hoặc chức năng. The delete operator deletes both the value of the property and the property itself. After deletion, the property cannot be used before it is added back again. The delete operator is designed to be used on object properties. It has no effect on variables or functions.

Cái gì được sử dụng để loại bỏ các phần tử trong JavaScript?

Trong JavaScript, chỉ có thể xóa một phần tử khỏi phần tử cha của nó. Để xóa một phần tử, bạn phải lấy phần tử, tìm phần tử gốc và xóa phần tử đó bằng cách sử dụng phương thức removeChild .

Làm cách nào để xóa thẻ bằng JavaScript?

Chọn phần tử HTML cần xóa
Sử dụng phương thức JavaScript remove() và removeChild() để xóa phần tử khỏi tài liệu HTML