Let's talk about several methods of handling GBK encoding in JavaScript

With the rapid development of the Internet, more and more websites are beginning to use Unicode encoding (such as UTF-8, etc.) to represent text. But in China, GBK encoding is still a common character encoding method, especially on some old websites. For front-end engineers, it is very necessary to understand how to deal with garbled text encoded by GBK. In this article, we will introduce several methods of handling GBK encoding in JavaScript and give corresponding sample codes.

1. Introduction to GBK encoding

GBK encoding is a double-byte character encoding method that uses 2 bytes to represent a character. It is generally used to represent Chinese characters and symbols. According to the Chinese national standard GB2312, GBK encoding contains the GB2312 character set and also contains a large number of Chinese characters and symbols.

2. Problems with GBK encoding

Since GBK encoding is incompatible with Unicode encoding, if GBK encoded text is processed directly in JavaScript, garbled characters will appear, as shown in the following figure:

3. Convert GBK encoding to Unicode encoding

In order to solve the garbled code problem, we need to convert GBK encoding to Unicode encoding. In JavaScript, we can use a library called 'GBK' to do the conversion.

First of all, we need to install the 'GBK' library, which can be performed in the console with the following command:

npm install gbk

After the installation is complete, we can use the following code to convert GBK encoded strings to Unicode Encoded string:

const gbk = require('gbk');
const gbkStr = 'GBK编码字符串';
const unicodeStr = gbk.toString('ucs2', gbkStr);
console.log(unicodeStr);

In the above code, we first introduce the 'gbk' object through the 'GBK' library, then define a GBK encoded string 'gbkStr', and finally use the 'gbk.toString' method to Convert it into a Unicode encoded string and output the result.

4. Convert Unicode encoding to GBK encoding

Converting Unicode encoding to GBK encoding also requires the use of the 'GBK' library. The code example is as follows:

const gbk = require('gbk');
const unicodeStr = 'Unicode编码字符串';
const gbkStr = gbk.toString('gbk', unicodeStr, 0);
console.log(gbkStr);

In the above code , we also introduce the 'gbk' object through the 'GBK' library, define a Unicode encoding string 'unicodeStr', and finally use the 'gbk.toString' method to convert it into a GBK encoding string and output the result.

5. Use iconv-lite library

In addition to the 'GBK' library, we can also use another library called 'iconv-lite' to convert GBK encoding. The 'iconv-lite' library natively supports GBK encoding, so it can be used directly.

The following is a code example to convert a GBK encoded string to a Unicode encoded string:

const iconv = require('iconv-lite');
const gbkStr = 'GBK编码字符串';
const unicodeStr = iconv.decode(Buffer.from(gbkStr, 'binary'), 'gbk');
console.log(unicodeStr);

In the above code, we first introduce 'iconv' through the 'iconv-lite' library object, then define a GBK encoded string 'gbkStr', and finally use the 'iconv.decode' method to convert it into a Unicode encoded string and output the result.

Similarly, we can also use the 'iconv-lite' library to convert Unicode encoded strings to GBK encoded strings. The code example is as follows:

const iconv = require('iconv-lite');
const unicodeStr = 'Unicode编码字符串';
const gbkStr = iconv.encode(unicodeStr, 'gbk').toString('binary');
console.log(gbkStr);

In the above code, we also pass The 'iconv-lite' library introduces the 'iconv' object, defines a Unicode encoding string 'unicodeStr', and finally uses the 'iconv.encode' method to convert it into a GBK encoding string and output the result.

6. Summary

The above are several ways to handle GBK encoding in JavaScript. Although many websites have gradually adopted Unicode encoding, there are still many old websites using GBK encoding. Therefore, it is very necessary for front-end engineers to master the method of solving GBK encoding garbled characters.

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