This function mirrors the codePointAt function from the JavaScript Standard String object. It
handles Unicode code points instead of UTF-16 character codes.
Returns a non-negative integer that is the Unicode code point value of the character starting at
the given index.
Parameters
string: string
String to index
index: number
Position of the string character to be returned, in the range of 0 to
length(string)-1
Returns undefined|number
Non-negative integer representing the code point value of the character at the given
index, or undefined if there is no element at that position
This function mirrors the
codePointAtfunction from the JavaScript Standard String object. It handles Unicode code points instead of UTF-16 character codes.Returns a non-negative integer that is the Unicode code point value of the character starting at the given index.