Converts the string to uppercase. An alias for toUpperCase().
toUpperCase()
This is null | undefined safe. If you pass null | undefined then this will return "".
null | undefined
""
upper(null); // ""upper("Hello world"); // "HELLO WORLD" Copy
upper(null); // ""upper("Hello world"); // "HELLO WORLD"
Converts the string to uppercase. An alias for
toUpperCase().