Table of Contents
Login
Home Web Front-end Front-end Q&A How to implement login page jump in Node.js application

How to implement login page jump in Node.js application

Apr 05, 2023 pm 01:47 PM

Node.js (Node for short) is a JavaScript runtime environment based on the V8 engine, which allows JavaScript to run on the server side. Using Node.js for web development has the advantages of being lightweight, efficient, and scalable.

This article will introduce how to implement login page jump in Node.js application.

  1. Create login page HTML file

First, we need to create a login page HTML file, which should include a form for users to enter their username and password. , and a submit button for submitting the form. The HTML code is as follows:

nbsp;html>


    <meta>
    <title>Login</title>


    <h1 id="Login">Login</h1>
    
Copy after login
        
                                  
        
                                  
             

In the form, we define method as post, which means using POST method to submit the form data, in action The login address /login is specified.

  1. Complete the login processing logic of the Node.js application

When the user submits the form, the Node.js application will receive the POST request and process the username and password entered by the user. password. In this example, we use a simple way to store the username and password directly in variables on the server side, and jump to the homepage after verifying that the login is successful (in this example we use /home as the homepage address).

The code is implemented as follows (using the Express framework):

const express = require('express');
const app = express();

// 定义用户名和密码
const username = 'admin';
const password = '123456';

// 处理登录请求
app.post('/login', function (req, res) {
    const { username: inputUsername, password: inputPassword } = req.body;
    if (inputUsername === username && inputPassword === password) {
        res.redirect('/home');
    } else {
        res.send('Invalid username or password');
    }
});

// How to implement login page jump in Node.js application
app.get('/home', function (req, res) {
    res.send('Welcome to the home page');
});

// 启动服务
app.listen(3000, function () {
    console.log('Server started on port 3000');
});
Copy after login

In the above code, we use the body-parser middleware to parse the JSON sent by the client POST request data and store the username and password in inputUsername and inputPassword. We then compare it with the preset username and password, and if the match is successful, use res.redirect to jump to the homepage/home , otherwise an error message will be sent.

Note that we simply sent a welcome message in the /home route. In actual development, we need to specify the appropriate view template to render and display the page.

  1. Run the application

Now, we start the Node.js application and visit the login page in the browserhttp://localhost:3000 , you can see the login form (if there is no exception in the project), as shown below:

How to implement login page jump in Node.js application

Enter the correct user name and password, click the "Login" button, and the page will jump Go to the home page /home, as shown below:

How to implement login page jump in Node.js application

So far, we have implemented the login page jump function in the Node.js application. You The code can also be further improved to support more login methods and user verification methods.

The above is the detailed content of How to implement login page jump in Node.js application. 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)

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.

React and the Frontend: Building Interactive Experiences React and the Frontend: Building Interactive Experiences Apr 11, 2025 am 12:02 AM

React is the preferred tool for building interactive front-end experiences. 1) React simplifies UI development through componentization and virtual DOM. 2) Components are divided into function components and class components. Function components are simpler and class components provide more life cycle methods. 3) The working principle of React relies on virtual DOM and reconciliation algorithm to improve performance. 4) State management uses useState or this.state, and life cycle methods such as componentDidMount are used for specific logic. 5) Basic usage includes creating components and managing state, and advanced usage involves custom hooks and performance optimization. 6) Common errors include improper status updates and performance issues, debugging skills include using ReactDevTools and Excellent

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.

React Components: Creating Reusable Elements in HTML React Components: Creating Reusable Elements in HTML Apr 08, 2025 pm 05:53 PM

React components can be defined by functions or classes, encapsulating UI logic and accepting input data through props. 1) Define components: Use functions or classes to return React elements. 2) Rendering component: React calls render method or executes function component. 3) Multiplexing components: pass data through props to build a complex UI. The lifecycle approach of components allows logic to be executed at different stages, improving development efficiency and code maintainability.

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 functional components in Vue.js? When are they useful? What are functional components in Vue.js? When are they useful? Mar 25, 2025 pm 01:54 PM

Functional components in Vue.js are stateless, lightweight, and lack lifecycle hooks, ideal for rendering pure data and optimizing performance. They differ from stateful components by not having state or reactivity, using render functions directly, a

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.

React and the Frontend Stack: The Tools and Technologies React and the Frontend Stack: The Tools and Technologies Apr 10, 2025 am 09:34 AM

React is a JavaScript library for building user interfaces, with its core components and state management. 1) Simplify UI development through componentization and state management. 2) The working principle includes reconciliation and rendering, and optimization can be implemented through React.memo and useMemo. 3) The basic usage is to create and render components, and the advanced usage includes using Hooks and ContextAPI. 4) Common errors such as improper status update, you can use ReactDevTools to debug. 5) Performance optimization includes using React.memo, virtualization lists and CodeSplitting, and keeping code readable and maintainable is best practice.

See all articles