JavaScript: String.fromCharCode
str.length
Number of 16 bits units in string str. This is the same as number of characters in string if all the characters are ASCII. [see JavaScript: String Code Unit]
console.log("a".length); // 1 // GRINNING CAT FACE WITH SMILING EYES, 128568, U+1F638 console.log("😸".length); // 2
Here is a function that returns number of chars in string.
// function that returns number of chars in string const stringRealLength = (str => { let i = 0; for (let c of str) { i += 1; } return i; }); // test console.log( stringRealLength("😸") ); // 1 // GRINNING CAT FACE WITH SMILING EYES, 128568, U+1F638 console.log("😸".length); // 2