JavaScript: String.prototype.charCodeAt
str.charCodeAt(index)
- Return a integer that's the String Code Unit at index index in str.
console.log("abc".charCodeAt(0) === 97);
If the string contains NON-ASCII character, result may not be what you expect.
console.log("π".charCodeAt(0) === 55357); console.log("π".charCodeAt(0) === 0xd83d); /* [ π name: FACE WITH TEARS OF JOY codepoint decimal: 128514 codepoint hexadecimal: 1f602 UTF-8 encoding: F0 9F 98 82 UTF-16 encoding: D8 3D DE 02 since the char π in UTF-16 encoding is D8 3D DE 02, so the first byte in hexadecimal is D83D, which in decimal is 55357. therefore its charCode at 0th index is 55357. ] */