15 lines
476 B
TypeScript
15 lines
476 B
TypeScript
/**
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* Converts the first character of string to upper case.
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*
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* @param {string} str - The string that is to be changed
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* @returns {string} - The converted string.
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*
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* @example
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* const convertedStr1 = upperFirst('fred') // returns 'Fred'
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* const convertedStr2 = upperFirst('Fred') // returns 'Fred'
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* const convertedStr3 = upperFirst('FRED') // returns 'FRED'
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*/
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declare function upperFirst<T extends string = string>(str?: T): Capitalize<T>;
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export { upperFirst };
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