js过滤检测敏感词汇

<textarea rows="10" cols="100" id="myDiv"></textarea>
<button id="getFile" onclick="yz()">校验文字</button>

//禁止多次请求
let stRs=sessionStorage.getItem(‘stRs‘)?sessionStorage.getItem(‘stRs‘):loadXMLDoc();
//从菜鸟教程摘的简易ajax-get读文件
function loadXMLDoc() {
            var xmlhttp;
            if (window.XMLHttpRequest) {
                //  IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
                xmlhttp = new XMLHttpRequest();
            }
            else {
                // IE6, IE5 浏览器执行代码
                xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xmlhttp.onreadystatechange = function () {
                if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {                    
                    stRs=(xmlhttp.responseText).replace(/\s+/g,‘|‘);                    
                    sessionStorage.setItem("stRs",stRs);
                }
            }
            xmlhttp.open("GET", "./CensorWords.txt", true);
            xmlhttp.send();
        }
//校验方法
function yz () {
            var s=(document.getElementById("myDiv").value).trim();
            if (s!==‘‘){
                //console.log(stRs);
                var re = new RegExp(stRs, "g");
                if(s.match(re)){                    
                    console.log("%c敏感词汇将被替换为：","color:red",s.replace(re,‘??‘));
                }else {
                    console.log(s);
                }           
            }else {
                alert(‘内容为空怎校验？‘)
            }
        }