How to write Chinese characters in javascript

In JavaScript, Chinese characters, like other characters, can be represented and manipulated in the form of strings.

When writing JavaScript code, you can use Chinese characters directly, but you need to ensure that the editor or IDE (integrated development environment) you use supports Unicode encoding. Because in JavaScript, Chinese characters are processed using Unicode encoding. Unicode is a character encoding standard that includes almost all character sets, including Chinese characters, Latin letters, numbers, etc.

The following is a simple JavaScript example that shows how to define and operate Chinese character strings:

var name = '张三';  // 定义一个汉字字符串变量
console.log(name);  // 输出：张三

// 获取字符串长度
var len = name.length;
console.log(len);   // 输出：2

// 字符串连接
var greeting = '你好，' + name + '！';
console.log(greeting);  // 输出：你好，张三！

// 字符串截取
var firstName = name.substr(0, 1);   // 获取姓氏
console.log(firstName);  // 输出：张

var lastName = name.substr(1, 1);   // 获取名字
console.log(lastName);   // 输出：三

In addition to the above basic string operations, JavaScript also provides various string methods, such as charAt(), replace(), toUpperCase(), toLowerCase(), etc. These methods can be used to process Chinese characters Strings are like other strings.

In web development, it is often necessary to display Chinese character strings on the page. In this case, it is necessary to ensure that both the HTML file and the web server use UTF-8 encoding to avoid garbled characters or other character display problems. If there is a problem with garbled characters when displaying Chinese character strings, you can try the following solution:

1. Add the following code in the tag of the HTML file:

<meta charset="UTF-8">

This code ensures that HTML files are parsed and displayed in UTF-8 encoding.

2. Confirm that the web server outputs the data in UTF-8 encoding.

For example, in the Node.js environment, you can use the following statement to set the character set:

res.writeHead(200, {'Content-Type': 'text/html; charset=utf-8'});

This ensures that the data sent by the server is output to the browser in UTF-8 encoding. superior.

In general, there is not much difference between processing Chinese character strings and processing other strings in JavaScript. You just need to ensure the support of common coding standards to operate smoothly.

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