为什么清除不掉定时器？clearTimeout不生效

Answer 1

let timeout = null;

let a = 1;

function intervalFun() {

  clearTimeout(timeout);

  timeout = setTimeout(function () {

    console.log(1);

    intervalFun()

  }, 1000);

}

function cancelInterval() {

  console.log(timeout);

  clearTimeout(timeout);

}

function reStart(){

  cancelInterval();

  intervalFun();

}