Node.js is a JavaScript runtime based on the Chrome V8 engine. One of its advantages is the ease with which JavaScript can be used to build server-side applications, making it a popular choice for building web applications. However, when using Node.js to output Chinese characters, you sometimes encounter the problem of garbled characters.
There are many reasons why Node.js outputs Chinese garbled characters. Below we will list some possible reasons and solutions.
- Encoding issues
Node.js uses UTF-8 encoding by default, but in some cases other encoding methods may be used, resulting in garbled characters when outputting Chinese characters.
Solution: You can use the console.log()
function, and use the Buffer
method to convert the character set to be output to UTF-8 before outputting.
console.log(Buffer.from('Hello World', 'utf8').toString('hex')); // e6849fe696873a20476f726c64
- Terminal display problem
Some terminals cannot correctly display the input characters if the character set is not set, resulting in garbled characters when outputting Chinese characters.
Solution: Set the character set in the terminal, for example, use the chcp 65001
command in the Windows command prompt. If you're using Mac OS or Linux, you can choose to use UTF-8 encoding in your terminal's settings.
- The encoding method is not specified correctly
When using the built-in fs
module of Node.js to read or write a text file, if the encoding method is not specified correctly Specifying the file encoding method will cause garbled characters when outputting Chinese characters.
Solution: Specify the encoding method of the file, for example:
fs.readFile('test.txt', 'utf8', function(err, data) { if (err) throw err; console.log(data); });
- HTTP response header does not specify the encoding method
When using Node.js to build the Web When applying a program, if the HTTP response header does not specify the encoding method correctly, garbled characters will appear when outputting Chinese characters.
Solution: Add the character set encoding method in the response header, for example:
res.setHeader('Content-type', 'text/html;charset=utf-8'); res.write('<html><head><title>你好</title></head><body>你好</body></html>'); res.end();
Summary:
The above are some of the current reasons that may cause Node.js to output Chinese garbled characters and solutions. You need to pay attention to these issues during development and adopt correct processing methods when outputting Chinese characters.
The above is the detailed content of nodejs outputs Chinese garbled characters. For more information, please follow other related articles on the PHP Chinese website!

React’s popularity includes its performance optimization, component reuse and a rich ecosystem. 1. Performance optimization achieves efficient updates through virtual DOM and diffing mechanisms. 2. Component Reuse Reduces duplicate code by reusable components. 3. Rich ecosystem and one-way data flow enhance the development experience.

React is the tool of choice for building dynamic and interactive user interfaces. 1) Componentization and JSX make UI splitting and reusing simple. 2) State management is implemented through the useState hook to trigger UI updates. 3) The event processing mechanism responds to user interaction and improves user experience.

React is a front-end framework for building user interfaces; a back-end framework is used to build server-side applications. React provides componentized and efficient UI updates, and the backend framework provides a complete backend service solution. When choosing a technology stack, project requirements, team skills, and scalability should be considered.

The relationship between HTML and React is the core of front-end development, and they jointly build the user interface of modern web applications. 1) HTML defines the content structure and semantics, and React builds a dynamic interface through componentization. 2) React components use JSX syntax to embed HTML to achieve intelligent rendering. 3) Component life cycle manages HTML rendering and updates dynamically according to state and attributes. 4) Use components to optimize HTML structure and improve maintainability. 5) Performance optimization includes avoiding unnecessary rendering, using key attributes, and keeping the component single responsibility.

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

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.

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 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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver Mac version
Visual web development tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

SublimeText3 Linux new version
SublimeText3 Linux latest version

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.