JavaScript: String.prototype.charAt

By Xah Lee. Date: . Last updated: .
str.charAt(index)
Return a string of length 1 that's the String Code Unit at index index of str. Return empty string if index is out of bound. 
console.log("abc".charAt(0) === "a");

If index is out of bound, return empty string.

console.log("abc".charAt(9) === ""); // true
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