loop break

gistfile1.js

var la = new Array(500);

for (var i = 0; i < la.length; i++) {
	la[i] = i;
}

var target = [];
var loop = function () {
	var temp = la;
	var slices = 50;
	var timer = setInterval(function () {
		var len=temp.length
		for (var i=0;i < len;i++) {
			if (i==slices) {
				console.log("exit loop");
				break;
			}
			target.push(temp[i]);
			console.log(i);
		}
		temp = temp.slice(slices, -1);
		if(temp.length==0){
			console.log("exit timer", target, '-------', la);
			clearInterval(timer);	
		}
	},0);
}

loop();

console.log('outsite', la.length);