export default {
	/**
	 * 单秒倒计时
	 * @param {Number} initialTime 起始时间
	 * @param {Function} call 倒计时回调
	 */
	countDownForSecond(initialTime, call) {
		initialTime--
		call(initialTime)
		let timer = setInterval(function() {
			if (initialTime == 0) {
				clearInterval(timer)
			} else {
				initialTime--
				call(initialTime, timer)
			}
		}, 1000)
		return timer
	},
	
}