核心代码 

import * as fs from 'fs';
import * as path from 'path';
import * as readline from 'readline';export default class BadWords {private static _instance: BadWords;private data: Array<string> = [];constructor () {const files = fs.readdirSync(path.resolve(__dirname, './libs/'));files.forEach(file => {if (path.extname(file) === '.txt') {const rl = readline.createInterface({input: fs.createReadStream(path.resolve(__dirname, './libs/', file))});rl.on('line', line => {if (line) {if (line.substring(line.length - 1) === ',') {line = line.substring(0, line.length - 1);}this.data.push(line);}});}});}public static get instance () {if (!BadWords._instance) {BadWords._instance = new BadWords();}return BadWords._instance;}filter (content: string) {const tempImgs: Array<string> = [];let result = content;// 将图片部分放入临时数组中，以避免待会儿过滤词会匹配到图片内容result = result.replace(/!\[.+\]\(.+\)/g, val => {tempImgs.push(val);return '#IMG#';});// 匹配过滤词并用*替换this.data.forEach(keyword => {if (result.toUpperCase().includes(keyword.toUpperCase())) {const asterisks: Array<'*'> = [];for (let i = 0; i < keyword.length; i++) {asterisks.push('*');}result = result.replace(new RegExp(keyword, 'gi'), asterisks.join(''));}});// 恢复图片if (tempImgs.length) {result = result.replace(/#IMG#/g, () => <string>tempImgs.shift());}return result;}
}

在需要使用的地方引入

import BadWords from '../../common/badWords/index';
const badWords = BadWords.instance;badWords.filter(userName)

详细资源可点击下方链接下载

每个 `txt` 文件代表一个类型的敏感词词库，词库数据来源：  

https://github.com/fwwdn/sensitive-stop-words  

https://github.com/fighting41love/funNLP/tree/master/data/%E6%95%8F%E6%84%9F%E8%AF%8D%E5%BA%93