Combined Comparison / "Spaceship" Operator (<=>) in Javascript?
As far as I know there is no such operator in JavaScript but you can use Math.sign() function:
Math.sign(a - b);NOTE: As was mentioned in comments, Math.sign() is not currently supported by all browsers. Check for compatibility (MDN).
from: http://sabrelabs.com/post/48201437312/javascript-spaceship-operator
improved version:
function spaceship(val1, val2) { if ((val1 === null || val2 === null) || (typeof val1 != typeof val2)) { return null; } if (typeof val1 === 'string') { return (val1).localeCompare(val2); } else { if (val1 > val2) { return 1; } else if (val1 < val2) { return -1; } return 0; }}