utf-8 buffer gbk

diao.js

const iconv = require('iconv-lite');

const diaoEn = 'diao';
const diao = '很屌';

const diaoUTFBuf = Buffer.from(diao);
// 用utf-8编码的很屌, 然后用gbk去解码, 导致乱码了
const decoded = iconv.decode(diaoUTFBuf, 'gbk');

// mojibake(乱码)
console.log('很屌', decoded);

// '很屌'的utf-8编码, 中文占了三个字符
console.log('很屌', diaoUTFBuf);

// 'diao'的utf-8编码, 英文只占了一个字符
console.log('邮箱', Buffer.from(diaoEn));