Feng Wei 🔬

倒计时

<!DOCTYPE html>
<html lang="zh-cn">
  <head>
    <meta charset="UTF-8" />
  </head>
  <body>
    <script type="text/javascript">
      const get_timer = function (fun, countdown, delay, immediately) {
        //'use strict';
        let timer = null
        let count = function () {
          if (countdown < 0) {
            clearTimeout(timer)
            return
          }

          if (immediately && !timer) {
            fun.call(null, countdown, timer)
            countdown--
          }
          timer = setTimeout(function () {
            fun.call(null, countdown, timer)
            countdown--
            count()
          }, delay)
        }
        return count
      }

      const fun = function (time, timer) {
        console.info(time, timer)
      }

      //var test = get_timer(fun, 5, 1000, false);
      //test();

      //second fun
      const setTimer = (function () {
        let timer = null
        const clear = function () {
          console.info('clear', timer)
          clearTimeout(timer)
        }
        return {
          init: function (func, times, delay) {
            if (times <= 0) {
              return
            }
            timer = setTimeout(() => {
              func.call(this, arguments, timer)
              times--
              clear()
              this.init(func, times, delay)
            }, delay)
          },
        }
      })()

      setTimer.init(func, 5, 1000)

      function func(arg, timer) {
        console.info(arg[1], timer)
      }

      var call_bind_a = function () {
        return [(() => this.x).bind({ x: 'inner' })()]
      }.call({ x: 'outer' })
      //console.info(call_bind_a);

      //程序5秒后执行
      function delay_exec_fun(func, times, delay) {
        let timer = null
        console.info(times)
        if (times == 0) {
          func()
          return
        }
        setTimeout(() => {
          times--
          delay_exec_fun(func, times, delay)
        }, delay)
      }

      function c() {
        console.info('5秒后执行该代码')
      }

      delay_exec_fun(c, 5, 1000)
    </script>
  </body>
</html>