Home Web Front-end JS Tutorial How to implement one-way binding in the vue component passing object?

How to implement one-way binding in the vue component passing object?

Jun 02, 2018 pm 05:12 PM
unidirectional accomplish object

Below I will share with you an example of implementing one-way binding in the object passed by the vue component. It has a good reference value and I hope it will be helpful to everyone.

When using vue components, data often needs to be passed between components. We will not discuss the situation of passing a string variable or numeric variable here. It is enough to read the official documentation. Here I propose that I will pass a string variable or a numeric variable between components. A pitfall encountered when passing objects.

When an object is passed between components, since the reference type of this object points to an address, if a certain attribute value of the object is modified in the child component, the corresponding attribute of the object in the parent component will also be modified accordingly. If there is a need for such two-way binding, then this is also a good method. However, if such two-way binding is not needed, then a new object must be defined to copy the properties and values ​​​​of the original object. The pitfall is here. If you use an ordinary var or let object, for example:

computed: { 
  data: function () { 
   let obj={}; 
   obj=this.message//this.message是父组件传递的对象 
   return obj 
 } 
 },
Copy after login

Bind each attribute in the data to the input box and try to modify it. You will find that the corresponding properties in the parent component The attribute value will still change, and the one-way binding effect is not achieved. At this time, a method needs to be added

computed: { 
 data: function () { 
  let obj=Object.assign({}, this.message); 
  return obj 
 } 
 },
Copy after login

The data returned in this way is a new object and will not point to the address of the original object. So modifying it will not affect the objects in the parent component.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

Related articles:

JS anonymous function and anonymous self-executing function concept and usage analysis

Solving the problem when installing as npm administrator Permission issues

vue-router related basic knowledge and working principles

The above is the detailed content of How to implement one-way binding in the vue component passing object?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to implement dual WeChat login on Huawei mobile phones? How to implement dual WeChat login on Huawei mobile phones? Mar 24, 2024 am 11:27 AM

How to implement dual WeChat login on Huawei mobile phones? With the rise of social media, WeChat has become one of the indispensable communication tools in people's daily lives. However, many people may encounter a problem: logging into multiple WeChat accounts at the same time on the same mobile phone. For Huawei mobile phone users, it is not difficult to achieve dual WeChat login. This article will introduce how to achieve dual WeChat login on Huawei mobile phones. First of all, the EMUI system that comes with Huawei mobile phones provides a very convenient function - dual application opening. Through the application dual opening function, users can simultaneously

PHP Programming Guide: Methods to Implement Fibonacci Sequence PHP Programming Guide: Methods to Implement Fibonacci Sequence Mar 20, 2024 pm 04:54 PM

The programming language PHP is a powerful tool for web development, capable of supporting a variety of different programming logics and algorithms. Among them, implementing the Fibonacci sequence is a common and classic programming problem. In this article, we will introduce how to use the PHP programming language to implement the Fibonacci sequence, and attach specific code examples. The Fibonacci sequence is a mathematical sequence defined as follows: the first and second elements of the sequence are 1, and starting from the third element, the value of each element is equal to the sum of the previous two elements. The first few elements of the sequence

How to implement the WeChat clone function on Huawei mobile phones How to implement the WeChat clone function on Huawei mobile phones Mar 24, 2024 pm 06:03 PM

How to implement the WeChat clone function on Huawei mobile phones With the popularity of social software and people's increasing emphasis on privacy and security, the WeChat clone function has gradually become the focus of people's attention. The WeChat clone function can help users log in to multiple WeChat accounts on the same mobile phone at the same time, making it easier to manage and use. It is not difficult to implement the WeChat clone function on Huawei mobile phones. You only need to follow the following steps. Step 1: Make sure that the mobile phone system version and WeChat version meet the requirements. First, make sure that your Huawei mobile phone system version has been updated to the latest version, as well as the WeChat App.

Master how Golang enables game development possibilities Master how Golang enables game development possibilities Mar 16, 2024 pm 12:57 PM

In today's software development field, Golang (Go language), as an efficient, concise and highly concurrency programming language, is increasingly favored by developers. Its rich standard library and efficient concurrency features make it a high-profile choice in the field of game development. This article will explore how to use Golang for game development and demonstrate its powerful possibilities through specific code examples. 1. Golang’s advantages in game development. As a statically typed language, Golang is used in building large-scale game systems.

PHP Game Requirements Implementation Guide PHP Game Requirements Implementation Guide Mar 11, 2024 am 08:45 AM

PHP Game Requirements Implementation Guide With the popularity and development of the Internet, the web game market is becoming more and more popular. Many developers hope to use the PHP language to develop their own web games, and implementing game requirements is a key step. This article will introduce how to use PHP language to implement common game requirements and provide specific code examples. 1. Create game characters In web games, game characters are a very important element. We need to define the attributes of the game character, such as name, level, experience value, etc., and provide methods to operate these

How to convert MySQL query result array to object? How to convert MySQL query result array to object? Apr 29, 2024 pm 01:09 PM

Here's how to convert a MySQL query result array into an object: Create an empty object array. Loop through the resulting array and create a new object for each row. Use a foreach loop to assign the key-value pairs of each row to the corresponding properties of the new object. Adds a new object to the object array. Close the database connection.

How do PHP functions return objects? How do PHP functions return objects? Apr 10, 2024 pm 03:18 PM

PHP functions can encapsulate data into a custom structure by returning an object using a return statement followed by an object instance. Syntax: functionget_object():object{}. This allows creating objects with custom properties and methods and processing data in the form of objects.

What is the difference between arrays and objects in PHP? What is the difference between arrays and objects in PHP? Apr 29, 2024 pm 02:39 PM

In PHP, an array is an ordered sequence, and elements are accessed by index; an object is an entity with properties and methods, created through the new keyword. Array access is via index, object access is via properties/methods. Array values ​​are passed and object references are passed.

See all articles