nodejs console garbled code

Node.js, as a server-side JavaScript running environment, has been widely used in the development of web applications. With the popularity and development of Node.js, developers are encountering more and more problems, one of which is the problem of garbled console output. This article explores this problem and provides a solution.

1. Why garbled characters appear

In Node.js, developers can use the console to output debugging information. The console functions similarly to the console in the browser and can output various types of information, such as strings, numbers, objects, etc. However, when some developers use the console to output Chinese characters, they will find that the information output by the console is garbled.

In fact, this problem is not unique to Node.js, but is caused by a combination of factors. Here are some reasons that may cause console output to be garbled.

1. The terminal does not support the Unicode character set

The terminal itself has a character encoding system. If the terminal does not support the Unicode character set, it will not be able to correctly display the Chinese characters output by the console.

2. The system character set is inconsistent with the terminal character set

Assume that the system character set is UTF-8, but the terminal character set is GB2312. At this time, the Chinese characters output by the console will also Garbled characters appear.

3. File encoding is inconsistent

Assume that some Chinese characters are defined in the file, and the encoding format of the stored file is GB2312, and the terminal character set output by the console is UTF-8, then control The Chinese characters output by the station will also appear garbled.

2. Solution

After understanding the cause of garbled characters, you can take corresponding solutions. Here are some possible solutions.

1. Set the terminal character set

You can solve the problem of console output garbled characters by setting the terminal character set. In Mac systems, the character set can be set through the "Preferences" of the terminal. On Windows systems, you can set the character set by right-clicking on the terminal window and selecting "Properties".

2. Set Node.js encoding format

Node.js uses UTF-8 encoding format by default, but in some cases you may encounter mismatched encoding formats that cause garbled characters. At this point, you can solve the problem by setting environment variables. In Linux and Mac systems, you can set environment variables through the following command:

export NODE_ENV=‘utf8’

In Windows systems, you can set environment variables through the following command:

set NODE_ENV=utf8

3. Use iconv-lite module

iconv-lite module can convert strings from one encoding format to another. In Node.js, you can use iconv-lite to convert the output string from UTF-8 format to an encoding format supported by the system or terminal. The following is a code example using iconv-lite:

const iconv = require('iconv-lite');
let str = '中文字符';
console.log(iconv.encode(str, 'GBK'));

4. File encoding format conversion

If the reason for console output garbled characters is that the file encoding format is inconsistent, you can convert the file encoding format. Solve the problem. For example, if the encoding format of the file is GBK, and the terminal character set output by the console is UTF-8, you can use the iconv-lite module to convert the file encoding format from GBK to UTF-8, so that the output string will not Garbled characters appear.

3. Summary

Console output garbled characters is a relatively common problem, but as long as you understand the cause, you can take corresponding solutions. By setting the terminal character set, setting the Node.js encoding format, using the iconv-lite module and converting the file encoding format, you can effectively solve the problem of Node.js console outputting garbled characters. When developing Node.js applications, don't panic when you encounter this problem. Just calm down and think about it, and I believe you can always find a solution.

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