String.prototype.charAt()
Returns the character (UTF-16 code unit) at the specified index.
Syntax
str.charAt(index)Parameters
| Name | Type | Required | Description |
|---|---|---|---|
index | number | No | Zero-based index of the character. Defaults to 0. |
Returns
string — A single-character string, or an empty string if the index is out of range.
Examples
console.log('hello'.charAt(1));
Output
e
console.log('abc'.charAt(9));
Notes
Returns an empty string (not undefined) for out-of-range indices. Operates on
UTF-16 code units, so it splits characters outside the BMP (use `at` or
iteration for full code points).
Browser & runtime support
| Environment | Since version |
|---|---|
| chrome | 1.0 |
| firefox | 1.0 |
| safari | 1.0 |
| edge | 12 |
| node | 0.10 |