Function strAt

strAt(value: string, index: number): string
The strAt() method takes an integer value and returns a new string consisting of the single UTF-16 code unit located at the specified offset into the string. It accepts both positive and negative integers: negative integers count back from the last string character.

This is the equivalent of String.prototype.at() and falls back to polyStrAt in environments where the native method is unavailable.
Parameters
- value: string
  The string value to retrieve a character from.
- index: number
  The zero-based index of the character to return. A negative index counts from the end of the string: -1 returns the last character, -2 the second-to-last, and so on.
Returns string
A single-character string at the given index, or undefined if the index is out of range.
Since
0.14.0

Throws
TypeError if value is null or undefined.
Example
```
strAt("hello", 0);   // "h"
strAt("hello", 1);   // "e"
strAt("hello", -1);  // "o"  — last character
strAt("hello", -2);  // "l"  — second-to-last
strAt("hello", 99);  // undefined — out of range
strAt("hello", -99); // undefined — out of range
```
- Defined in lib/src/string/at.ts:43