Function capitalizeFirstLetter

packages/renderer-core/src/utils/common.ts:260–265

(word: string)

 * @returns string capitalized string
 */
export function capitalizeFirstLetter(word: string) {
  if (!word || !isString(word) || word.length === 0) {
    return word;
  }
  return word[0].toUpperCase() + word.slice(1);
}

/**
 * check str passed in is a string type of not