setInterval(callback[, delay[, ...args]])

• callback <Function> 当定时器结束时调用的函数。
• delay <number> 调用 callback 之前等待的毫秒数。 默认值: 1.
• ...args <any> 调用 callback 时要传入的可选参数。
• 返回: <Timeout> 用于 clearInterval()

每 delay 毫秒调度重复执行 callback。

当 delay 大于 2147483647 或小于 1 时，则 delay 将设置为 1。 非整数延迟被截断为整数。

如果 callback 不是函数，则将抛出 TypeError。

• callback <Function> The function to call when the timer elapses.
• delay <number> The number of milliseconds to wait before calling the callback. Default: 1.
• ...args <any> Optional arguments to pass when the callback is called.
• Returns: <Timeout> for use with clearInterval()

Schedules repeated execution of callback every delay milliseconds.

When delay is larger than 2147483647 or less than 1, the delay will be set to 1. Non-integer delays are truncated to an integer.

If callback is not a function, a TypeError will be thrown.