原生js做模糊搜索

<input type="text" id="luo" oninput="fun()">
    <div id="sen"></div>

let a = [1,2,3,45,6,7,89,09,7,6,5,98,567,8,76543];//数组
      let sen = document.getElementById('sen');//获取到标签
            //数据渲染
      function fu() {
        let str = '';
        for (let i = 0; i < a.length; i++) {
          str += '<p>' + a[i] + '</p>'
          sen.innerHTML = str;
        }
      }
            //具体的数据渲染，主要依靠indexof
      function fun() {
        let luo = document.getElementById('luo').value;
        let st = '';
        for (let m = 0; m < a.length; m++) {
          if (String(a[m]).indexOf(luo) > -1) {
            st += '<p>' + a[m] + '</p>'
          }
        }
        sen.innerHTML = st;
                //判断为空，调用函数
        if (luo == '') {
          fu()
        }
      }