To get the data from a function and export it, you can use the following code:

function onClick(e, item) {}

function itemsProject() {
  return  [
   {
    name: 'companies',
    label: translate('sidebarProjectCompanies'),
    Icon: CompanyIcon,
    path: '/project/:id/companies',
    onClick,
   }
   {
    name: 'currencies',
    label: translate('sidebarProjectCurrencies'),
    Icon: CurrencyIcon,
    path: '/project/:id/currencies',
    onClick,
   }
 ]
};

export default itemsProject;

Use it in other files as:

import itemsProject from "/path/of/file";


itemsProject();

Declare the function and return the same array.

function onClick(e, item) {}

function itemsProject() {

 return [
    {
       name: 'companies',
       label: translate('sidebarProjectCompanies'),
       Icon: CompanyIcon,
       path: '/project/:id/companies',
       onClick,
     }
     {
       name: 'currencies',
       label: translate('sidebarProjectCurrencies'),
       Icon: CurrencyIcon,
       path: '/project/:id/currencies',
       onClick,
     }
   ];
}