@firefox-devtools/react-contextmenu/es6/helpers.js

Context Menu implemented in React

export function callIfExists(func) {
  for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    args[_key - 1] = arguments[_key];
  }
  return typeof func === 'function' && func(...args);
}
export function hasOwnProp(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}
export function uniqueId() {
  return Math.random().toString(36).substring(7);
}
export const cssClasses = {
  menu: 'react-contextmenu',
  menuVisible: 'react-contextmenu--visible',
  menuWrapper: 'react-contextmenu-wrapper',
  menuItem: 'react-contextmenu-item',
  menuItemActive: 'react-contextmenu-item--active',
  menuItemDisabled: 'react-contextmenu-item--disabled',
  menuItemDivider: 'react-contextmenu-item--divider',
  menuItemSelected: 'react-contextmenu-item--selected',
  subMenu: 'react-contextmenu-submenu'
};
export const store = {};
export const canUseDOM = Boolean(typeof window !== 'undefined' && window.document && window.document.createElement);