javascript - 简单而问题(javascript)

Question

任何人都可以阐明为什么我无法停止和开始这个循环吗？

 <input type="button" value="start" onclick="start()">
 <input type="reset" value="stop" onClick="stop()">

var startLottery = false;

while(startLottery){
setInterval(function(){automateLottery()},120);
startLottery;
};

var start = function(){
startLottery = true;    
};

var stop = function(){
startLottery = false;   
};

谢谢

Answer 1

你不能开始和停止这样的循环。您需要使用 setInterval 和 clearInterval:

JS:

var lotteryInterval;

var start = function(){
    lotteryInterval = setInterval(lotteryFunc, 120);
};

var stop = function(){
    clearInterval(lotteryInterval);
};

var lotteryFunc = function () {
    automateLottery();
};

HTML:

<input type="button" value="start" onclick="start()">
<input type="reset" value="stop" onClick="stop()">

编辑:Working demo .