Async function to replace words between brackets

replaceBrackets.js

/**
 * Async function to replace words between brackets 
 *
 * E.g.
 * replaceBrackets(
 *   "Hey, {{ name }}. We just sent your authentication code to {{ email||phoneNumber }}",
 *   {
 *     name: "Jhon Doe",
 *     email: "[email protected]"
 *   }
 * )
 *   .then(message => {
 *     console.log(message);
 *   })
 *   .catch(error => {
 *     console.log(error)
 *   });
 * 
 * You can also use trycatch inside an async function/methos
 * async myMethod() {
 *  try {
 *    const message = await replaceBrackets(
 *      "Hey, {{ name }}. We just sent your authentication code to {{ email||phoneNumber }}",
 *      {
 *        name: "Jhon Doe",
 *        email: "[email protected]"
 *      }
 *    );
 *    console.log(message);
 *  } catch (error) {
 *    console.log(error);
 *  }
 * }
 *
 * @param {String} string The string containing words between brackets
 * @param {Object} data Replacement data
 * @returns Promise
 */
const replaceBrackets = (string, data) => {
  return new Promise((resolve, reject) => {
    if (! string) reject("String required");
    if (! data) reject("Data required");
    
    const final = string.replace(/\{\{(.+?)\}\}/g, (_, g) => {
      let _variable;
      let _strArr = g.trim().split("||");
      if (_strArr.length > 1) {
        _variable = data[_strArr[0].trim()]
          ? data[_strArr[0].trim()]
          : data[_strArr[1].trim()];
      } else {
        _variable = data[_strArr[0].trim()];
      }
      
      return _variable ? _variable : null;
    });
    
    resolve(final);
  });
};