How to read Chinese in javascript

As a Web front-end programming language, JavaScript supports Chinese reading and use. However, when using Chinese programming, you need to pay attention to some details. Next, let us take a look at how JavaScript reads Chinese.

1. Encoding method

JavaScript supports multiple encoding methods, including ASCII, GB2312, GBK, UTF-8, etc. When using Chinese, be sure to choose the appropriate encoding method according to the actual situation.

Generally speaking, if you embed JavaScript code directly into HTML to run, it is best to use UTF-8 encoding to avoid the problem of Chinese garbled characters. If you are writing your code in a separate JavaScript file, consider using another encoding method. However, it is best to use UTF-8 encoding uniformly, which can reduce some troubles during the development process.

2. String

In JavaScript, string is a basic data type that can be used to represent Chinese strings. When using Chinese in a string, you need to pay attention to the following points:

• Both single quotes and double quotes can represent strings, but the same quotes need to be used to enclose the string content in the string. .
• In Chinese strings, you can use special characters such as spaces and punctuation marks, but you need to pay attention to using the correct symbols.
• If the string contains special characters such as double quotes or single quotes, you need to use escape characters to represent them.

Here are some examples:

var str1 = 'hello, world'; //英文字符串用单引号表示
var str2 = "你好，世界"; //中文字符串用双引号表示
var str3 = "JavaScript中的转义字符：\n"; //如果字符串中有特殊字符，需要使用转义字符进行转义

3. Variables

In JavaScript, variables are containers used to store data. When using Chinese variable names, you need to pay attention to the following points:

• Although Chinese variable names can be used, they are not recommended because codes mixed with Chinese and English are less readable.
• Variable names cannot start with numbers, but can only start with letters, underscores or dollar signs.
• Variable names cannot contain spaces or special characters, and can only use a combination of letters, numbers, underscores, or dollar signs.

Here are some examples:

var name = "张三"; //英文变量名
var age = 18;
var 标题 = "这是一个中文变量名"; //中文变量名，不建议使用
var $price = 100.0; //以美元符号开头的变量名
var _count = 20; //以下划线开头的变量名

4. Comments

Comments are explanatory text added by programmers when writing code to help others read the code . In JavaScript, comments can be expressed in two ways: single-line comments and multi-line comments.

A single-line comment is a comment starting with two slashes "//", which is equivalent to adding a paragraph of explanatory text at the end of the line of code. Multi-line comments are comments enclosed by "/" and "/", and descriptions can be added between multiple lines.

When using Chinese comments, UTF-8 encoded Chinese characters can be used. However, Chinese characters cannot be directly followed by double slashes and need to be escaped with comment symbols.

Here are some examples:

//这是一个单行注释

/*
这是一个多行注释
可以在其中添加多行文字
*/

//中文注释：
var name = "张三"; //这里是中文注释

5. Function

In JavaScript, a function is a reusable block of code that can be used to complete a specific function. When using Chinese function names, you need to pay attention to the following points:

• Function names cannot start with numbers, but can only start with letters, underscores or dollar signs.
• The function name cannot contain spaces or special characters, and can only use a combination of letters, numbers, underscores, or dollar signs.

Here are some examples:

function sayHello() {
  alert("你好！"); //英文函数名
}

function 计算总数() {
  //中文函数名，不建议使用
  var sum = 0;
  for (var i = 1; i <= 10; i++) {
    sum += i;
  }
  alert("总数是：" + sum);
}

var 安装程序 = function() {
  //中文函数名，不建议使用
  alert("正在安装程序，请稍候...");
};

6. Object properties

In JavaScript, an object is a container that can store data and functions. When using Chinese object attributes, you need to follow the following rules:

• Attribute names must be expressed in English.
• Attribute values ​​can be represented by Chinese strings.

Here are some examples:

var user = {
  name: "张三", //属性名用英文表示
  age: 18,
  gender: "男",
  介绍: "我是一个程序员" //属性值可以使用中文字符串表示
};

alert(user.介绍); //使用属性值时需要使用英文点号

7. Summary

When using JavaScript to read Chinese, you need to pay attention to the encoding method, strings, variables, comments, Details such as functions and object properties. Although you can program in Chinese, it is recommended to use English as much as possible to improve the readability and maintainability of the code.

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