String.prototype.at

Returns the UTF-16 code unit at the given index as a string. If the index is negative, counts back from the last code unit.

Syntax

at(index)

Parameters

• index

  If positive, the index of the code unit to return. If negative, the index of the code unit to return, counting back from the last code unit.

Return value

A code unit as a string or undefined.

Example

"spring".at(1)

"p"

"spring".at(-1)

"g"