es-toolkit
Version:
A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
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text/typescript
/**
* Converts `string`, as a whole, to upper case just like
* [String#toUpperCase](https://mdn.io/toUpperCase).
*
* @param {unknown} [value=''] The value to convert.
* @returns {string} Returns the upper cased string.
* @example
*
* toUpper('--foo-bar--');
* // => '--FOO-BAR--'
*
* toUpper(null);
* // => ''
*
* toUpper([1, 2, 3]);
* // => '1,2,3'
*/
declare function toUpper<T extends string = string>(value?: T): Uppercase<T>;
export { toUpper };