小编J. *_*fey的帖子

function contains() {
  var check = false;
  while (!check) {
    var random = Math.floor(Math.random() * 10);
    random += 1;
    for (var i = 0; i < arr.length; i++) {
      if (arr[i] === random) {
        console.log(random);
        check = false;
        return false;
      }
    }
    check = true;
    console.log(random);
    return true;
  }
}

var arr = [1, 2, 3, 4, 5, 6];

$(".test").on("click", function() {
  contains(arr);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button class="test">
Test
</button>