How to generate non-repeating random numbers in javascript_javascript skills

[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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(new Date(). getTime()) ^ Math.random();

Random and basically difficult to repeat...
It’s better to forget it like this. . Randomly generate non-repeating numbers and also arrange them from largest to smallest. .

[Ctrl A select all Note:

If you need to introduce external Js, you need to refresh to execute <script> alert(new Date().getTime())</script>]<script> function create(n) { var temp=Math.floor(Math.random()*10+n*10); while(--n!=0) { return temp+","+create(n); } if(n==0) { return temp; } } alert(create(10)); </script>