toUpper
INFO
This function is only available in es-toolkit/compat for compatibility reasons. It either has alternative native JavaScript APIs or isn’t fully optimized yet.
When imported from es-toolkit/compat, it behaves exactly like lodash and provides the same functionalities, as detailed here.
Converts the given value to a string and transforms it to uppercase. The function can handle various input types by first converting them to strings.
Signature
typescript
function toUpper(value?: unknown): string;Parameters
value(unknown) : The value to convert to uppercase. If omitted, returns an empty string.
Returns
string : The uppercase version of the input value converted to a string.
Examples
typescript
import { toUpper } from 'es-toolkit';
toUpper('--foo-bar--'); // returns '--FOO-BAR--'
toUpper('Hello World'); // returns 'HELLO WORLD'
toUpper(null); // returns ''
toUpper([1, 2, 3]); // returns '1,2,3'
toUpper(123); // returns '123'
toUpper(); // returns ''