The “double tilde” (~~) operator is a double NOT Bitwise operator. Use it as a substitute for Math.floor(), since it’s faster.
Example
You can try to run the following code to learn about double tilde operator −
<html>
<body>
<script>
var a = 2;
var b,c, d;
b = ~~a;
c = Math.floor(a);
d = ~~b=== c;
document.write(b);
document.write("<br>"+c);
document.write("<br>"+d); // They are equal
</script>
</body>
</html>