Detailed example of how js implements fuzzy query

let listData = ["上海市","黄浦区","卢湾区","徐汇区","长宁区","静安区","普陀区",
  "闸北区","杨浦区","虹口区","闵行区","宝山区","嘉定区","浦东新区",
  "金山区","松江区","青浦区","南汇区","奉贤区","崇明县" ];
  
function Fuzzysearch(listData){
  this.listData = listData,//请求得到的数据
  this.searchKey = document.getElementById('searchKey'),//查询关键字
  this.searchBtn = document.getElementById('searchBtn'),//查询按钮
  this.searchShow = document.getElementById('searchShow')//显示查询结果的表格
 
  this.renderTab(this.listData);
  this.init();
}
Fuzzysearch.prototype={
      init :function(){
        let _this = this;
          //键入触发事件
        _this.searchKey.onkeyup=function(){
            let searchResult = _this.searchFn();
            _this.renderTab(searchResult);
        };
      //点击查询按钮触发事件
        _this.searchBtn.onclick=function(){
            let searchResult = _this.searchFn();
            _this.renderTab(searchResult);
        };
      },
      searchFn:function(){
        var keyWord = this.searchKey.value;
        var len = this.listData.length;
        var arr = [];
        var reg = new RegExp(keyWord);
        for(var i=0;i<len;i++){
            //如果字符串中不包含目标字符会返回-1
            if(this.listData[i].match(reg)){
                arr.push(listData[i]);
            }
        }
        return arr;
      }
      ,renderTab:function(list){
            let colStr = &#39;&#39;;   
            if(list.length==0){
              this.searchShow.innerHTML=&#39;未查询到关键字相关结果&#39;;
              return;
            }      
            for(var i=0,len=list.length;i<len;i++){
              colStr+="<tr><td>"+list[i]+"</td></tr>";
            }
            this.searchShow.innerHTML = colStr;
      }
}
 new Fuzzysearch(listData);