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<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
</head>
<body>
<div></div>
<script>
function randoms(min,max,rest){
var arr = []
while (true) {
var isExit = false
var random = Math.round(Math.random() * (max - min) + min)
for (var i = 0; i < arr.length; i++) {
if (random == arr[i]) {
isExit = true
break
}
}
if (!isExit) {
arr.push(random)
}
if (arr.length === rest) {
break
}
}
console.log(arr)
}
randoms(20,1,15)
</script>
</body>
</html>
