src/utilities/addToWindow.js

/**
 * Attach object to window without overwriting anything else.
 * @example
 * bse.utilities.addToWindow('bse', bse);
 * @param {string} keyValue - Keyword that you want use to get the object from window.
 * @param {Object} element - Dom element that you want to add to window.
 * @return {Promise<Object, MyError>} Promise object.
 */
export default function addToWindow(keyValue, element) {
  return new Promise((resolve, reject) => {
    // console.log(window[keyValue]);
    if (typeof window !== 'undefined') {
      if (typeof window[keyValue] === 'undefined') {
        window[keyValue] = element;
        window[keyValue].bseLoaded = true;
      } else if (typeof window[keyValue].bseLoaded === 'undefined' || !window[keyValue].bseLoaded) {
        console.error(`'${keyValue}' has been used on window object.`);
        reject(new Error(`'${keyValue}' has been used on window object.`));
      }
    } else {
      console.error('Cannot get window object');
      reject(new Error('Cannot get window object'));
    }
    resolve();
  });
}