I’m trying to save a function into a JSON and load it back.

My code is as following :

import { Style } from 'external-lib'

function testFunction() { return new Style(); }

var str = String(testFunction);

//Converting testFunction to string using String(testFunction) result in the following : 
function testFunction(feature, resolution) {
      return new external_lib_style_WEBPACK_IMPORTED_MODULE_9__["default"]();
}

//In order to convert string to a function again, i'm using : 
var fn = Function('return ' + str)();

fn(); //<------------ "lib_style_WEBPACK_IMPORTED_MODULE_9__ is not defined

I struggle to understand why lib_style_WEBPACK_IMPORTED_MODULE_9__ cannot be resolved as it is in the current context.

I tried the dumb solution of replacing lib_style_WEBPACK_IMPORTED_MODULE_9__[“default”] by Style but the result is the same, it throws Style is not defined.

Am I missing something there ?

Thanks and have a nice day !