JS: String.fromCharCode

By Xah Lee. Date: . Last updated: .

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 JS: Character, Code Unit, Codepoint]

console.log("a".length); // 1

// GRINNING CAT FACE WITH SMILING EYES, 128568, U+1F638
console.log("😸".length); // 2

Here's 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

JS String

  1. String Overview
  2. Template String
  3. Char, Code Unit, Codepoint
  4. String Escape Sequence
  5. Unicode Escape Sequence

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