Home Web Front-end Front-end Q&A How to destroy the previous page before Vue jumps

How to destroy the previous page before Vue jumps

May 23, 2023 pm 06:45 PM

With the development of front-end frameworks, more and more websites and applications are beginning to use Vue as the front-end framework. As a lightweight framework, Vue has excellent features such as responsiveness and componentization. However, when using Vue to jump to a page, some problems may occur, such as the previous page not being destroyed, resulting in excessive memory usage, event listeners not being correctly unbound, etc. This article will introduce how to destroy the previous page before jumping in Vue.

  1. Destroy the event listener of the previous page

In Vue, we can add event listeners through the created() life cycle function. For example, in a component, we need to listen to the mouse wheel event:

created() {
  window.addEventListener('wheel', this.onWheel);
}
Copy after login

This event listener is added when the component is created, but when we jump to the page, the previous page is not destroyed. This event listener The server has not been deleted. This may cause some troubles, such as the browser's scroll wheel event being monitored by multiple pages at the same time, increasing memory usage and performance consumption.

To avoid this situation, we need to remove the event listener when the component is destroyed. This can be achieved in the beforeDestroy() life cycle function:

beforeDestroy() {
  window.removeEventListener('wheel', this.onWheel);
}
Copy after login

This function will be called before the Vue instance is destroyed and removes the wheelevent listener.

  1. Destroy the timer of the previous page

In Vue, we can set the timer through setInterval() and setTimeout(). These timers may be added when the component is created, but may not be cleared correctly when the component is destroyed. If the timers are not cleared in time, they will continue to run until the page is unloaded or the browser is reloaded.

To avoid this situation, we need to clear the timer when the component is destroyed. This can be achieved through the beforeDestroy() life cycle function:

beforeDestroy() {
  clearInterval(this.intervalId);
  clearTimeout(this.timeoutId);
}
Copy after login

This function will be called before the Vue instance is destroyed and clears the interval and timeout timers.

  1. Destroy the non-Vue components of the previous page

In addition to the Vue component itself, there may be some non-Vue components on the page, such as third-party library plug-ins. Components also need to be properly cleaned. If these components are not destroyed, they may continue to occupy memory and resources, causing page performance degradation and memory leaks.

In the beforeDestroy() life cycle function of the Vue component, we can use the destroy() method to destroy non-Vue components. For example, if we use a third-party plugin in a component:

created() {
  this.$plugin = new Plugin();
  this.$plugin.init();
}

beforeDestroy() {
  this.$plugin.destroy();
}
Copy after login

This code snippet shows how to destroy a third-party plugin. On component creation, we create a new plugin instance and call the init() method. When the component is destroyed, we call the destroy() method to destroy the plug-in and release the memory.

Summary

Destroying the previous page before jumping in Vue is an important issue. If not handled correctly, it may lead to performance degradation and memory leaks. This article introduces how to correctly destroy event listeners, timers and non-Vue components through Vue's life cycle functions. In the actual development process, corresponding adjustments and processing should be made according to specific situations to ensure the performance and stability of the page.

The above is the detailed content of How to destroy the previous page before Vue jumps. 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 do you connect React components to the Redux store using connect()? How do you connect React components to the Redux store using connect()? Mar 21, 2025 pm 06:23 PM

Article discusses connecting React components to Redux store using connect(), explaining mapStateToProps, mapDispatchToProps, and performance impacts.

React's Role in HTML: Enhancing User Experience React's Role in HTML: Enhancing User Experience Apr 09, 2025 am 12:11 AM

React combines JSX and HTML to improve user experience. 1) JSX embeds HTML to make development more intuitive. 2) The virtual DOM mechanism optimizes performance and reduces DOM operations. 3) Component-based management UI to improve maintainability. 4) State management and event processing enhance interactivity.

How do you define routes using the <Route> component? How do you define routes using the <Route> component? Mar 21, 2025 am 11:47 AM

The article discusses defining routes in React Router using the &lt;Route&gt; component, covering props like path, component, render, children, exact, and nested routing.

What are the limitations of Vue 2's reactivity system with regard to array and object changes? What are the limitations of Vue 2's reactivity system with regard to array and object changes? Mar 25, 2025 pm 02:07 PM

Vue 2's reactivity system struggles with direct array index setting, length modification, and object property addition/deletion. Developers can use Vue's mutation methods and Vue.set() to ensure reactivity.

What are Redux reducers? How do they update the state? What are Redux reducers? How do they update the state? Mar 21, 2025 pm 06:21 PM

Redux reducers are pure functions that update the application's state based on actions, ensuring predictability and immutability.

What are the benefits of using TypeScript with React? What are the benefits of using TypeScript with React? Mar 27, 2025 pm 05:43 PM

TypeScript enhances React development by providing type safety, improving code quality, and offering better IDE support, thus reducing errors and improving maintainability.

What are Redux actions? How do you dispatch them? What are Redux actions? How do you dispatch them? Mar 21, 2025 pm 06:21 PM

The article discusses Redux actions, their structure, and dispatching methods, including asynchronous actions using Redux Thunk. It emphasizes best practices for managing action types to maintain scalable and maintainable applications.

How can you use useReducer for complex state management? How can you use useReducer for complex state management? Mar 26, 2025 pm 06:29 PM

The article explains using useReducer for complex state management in React, detailing its benefits over useState and how to integrate it with useEffect for side effects.

See all articles