JavaScript remove ZERO WIDTH SPACE (unicode 8203) from string

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The number in a unicode escape should be in hex, and the hex for 8203 is 200B (which is indeed a Unicode zero-width space), so:

var b = a.replace(/\u200B/g,'');

Live Example:

var a = "o​m"; //the invisible character is between o and m
var b = a.replace(/\u200B/g,'');
console.log("a.length = " + a.length);      // 3
console.log("a === 'om'? " + (a === 'om')); // false
console.log("b.length = " + b.length);      // 2
console.log("b === 'om'? " + (b === 'om')); // true

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