胡乱前端高手，一起来学学JS如何实现敏感词过滤

const app = getApp() Page({ data: { matchResult: {}, value: '', sensitiveMap: null }, onLoad() { const sensitiveMap = this.makeSensitiveMap(['你好', '你好呀', '好呀', '好']); console.log('sensitiveMap', sensitiveMap); this.data.sensitiveMap = sensitiveMap; }, onBlur(e) { const sensitiveMap = this.data.sensitiveMap; this.filterSensitiveWord(e.detail.value, sensitiveMap); }, makeSensitiveMap(sensitiveWordList) { // 构造根节点 const result = new Map(); for (const word of sensitiveWordList) { let map = result; for (let i = 0; i < word.length; i++) { // 依次获取字 const char = word.charAt(i); // 判断是否存在 if (map.get(char)) { // 获取下一层节点 map = map.get(char); } else { // 将当前节点设置为非结尾节点 if (map.get("laster") === true) { map.set("laster", false); } const item = new Map(); // 新增节点默认为结尾节点 item.set("laster", true); map.set(char, item); map = map.get(char); } // 判断当前的字符，是不是最后一个，若是最后一个就赋值一个标志位 if (word.length === i + 1) { map.set("lastDigit", i + 1); } } } return result; }, // 检查敏感词是否存在 checkSensitiveWord(sensitiveMap, txt, index) { let currentMap = sensitiveMap; let flag = false; let sensitiveWord = ""; //记录过滤出来的敏感词 for (let i = index; i < txt.length; i++) { const word = txt.charAt(i); currentMap = currentMap.get(word); if (currentMap) { sensitiveWord += word; if (currentMap.get("laster") === true || (currentMap.get("lastDigit") === txt.length)) { // 表示已到词的结尾 flag = true; break; } } else { break; } } return { flag, sensitiveWord }; }, // 判断文本中是否存在敏感词 filterSensitiveWord(txt, sensitiveMap) { let matchResult = { flag: false, sensitiveWord: "" }; // 过滤掉除了中文、英文、数字之外的 const txtTrim = txt.replace( /[^\u4e00-\u9fa5\u0030-\u0039\u0061-\u007a\u0041-\u005a]+/g, "" ); for (let i = 0; i < txtTrim.length; i++) { matchResult = this.checkSensitiveWord(sensitiveMap, txtTrim, i); if (matchResult.flag) { console.log(`sensitiveWord:${matchResult.sensitiveWord}`); this.setData({ matchResult }) break; } } return matchResult; } })