CRA - Browser error - Cannot assign to read only property 'window' of object












0















I am trying to use IndexedDbShim with a react application. I am using create-react-app and this is the main app index.js file that runs before everything else:



import '@babel/polyfill';

import React from 'react';
import ReactDOM from 'react-dom';
import { toJS } from 'mobx';
import AsyncLoad from './common/components/AsyncComponent';

import { setGlobalVars } from 'indexeddbshim';

global.window = global; // We'll allow ourselves to use `window.indexedDB` or `indexedDB` as a global
setGlobalVars(); // See signature below
...
// unrelated code continues here


I am getting the following error in the console:




Uncaught TypeError: Cannot assign to read only property 'window' of object '#'
at Object. (index.js:10)
at Object../src/index.js (index.js:35)
at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
at fn (bootstrap 8babaf20081f9cc7653e:111)
at Object.0 (index.js:35)
at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
at bootstrap 8babaf20081f9cc7653e:796
at bootstrap 8babaf20081f9cc7653e:796




Is there a known workaround for setting global window variables (IndexedDBShim seems to require it) using webpack? Setting it using the browser console seems to work as expected.










share|improve this question



























    0















    I am trying to use IndexedDbShim with a react application. I am using create-react-app and this is the main app index.js file that runs before everything else:



    import '@babel/polyfill';

    import React from 'react';
    import ReactDOM from 'react-dom';
    import { toJS } from 'mobx';
    import AsyncLoad from './common/components/AsyncComponent';

    import { setGlobalVars } from 'indexeddbshim';

    global.window = global; // We'll allow ourselves to use `window.indexedDB` or `indexedDB` as a global
    setGlobalVars(); // See signature below
    ...
    // unrelated code continues here


    I am getting the following error in the console:




    Uncaught TypeError: Cannot assign to read only property 'window' of object '#'
    at Object. (index.js:10)
    at Object../src/index.js (index.js:35)
    at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
    at fn (bootstrap 8babaf20081f9cc7653e:111)
    at Object.0 (index.js:35)
    at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
    at bootstrap 8babaf20081f9cc7653e:796
    at bootstrap 8babaf20081f9cc7653e:796




    Is there a known workaround for setting global window variables (IndexedDBShim seems to require it) using webpack? Setting it using the browser console seems to work as expected.










    share|improve this question

























      0












      0








      0








      I am trying to use IndexedDbShim with a react application. I am using create-react-app and this is the main app index.js file that runs before everything else:



      import '@babel/polyfill';

      import React from 'react';
      import ReactDOM from 'react-dom';
      import { toJS } from 'mobx';
      import AsyncLoad from './common/components/AsyncComponent';

      import { setGlobalVars } from 'indexeddbshim';

      global.window = global; // We'll allow ourselves to use `window.indexedDB` or `indexedDB` as a global
      setGlobalVars(); // See signature below
      ...
      // unrelated code continues here


      I am getting the following error in the console:




      Uncaught TypeError: Cannot assign to read only property 'window' of object '#'
      at Object. (index.js:10)
      at Object../src/index.js (index.js:35)
      at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
      at fn (bootstrap 8babaf20081f9cc7653e:111)
      at Object.0 (index.js:35)
      at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
      at bootstrap 8babaf20081f9cc7653e:796
      at bootstrap 8babaf20081f9cc7653e:796




      Is there a known workaround for setting global window variables (IndexedDBShim seems to require it) using webpack? Setting it using the browser console seems to work as expected.










      share|improve this question














      I am trying to use IndexedDbShim with a react application. I am using create-react-app and this is the main app index.js file that runs before everything else:



      import '@babel/polyfill';

      import React from 'react';
      import ReactDOM from 'react-dom';
      import { toJS } from 'mobx';
      import AsyncLoad from './common/components/AsyncComponent';

      import { setGlobalVars } from 'indexeddbshim';

      global.window = global; // We'll allow ourselves to use `window.indexedDB` or `indexedDB` as a global
      setGlobalVars(); // See signature below
      ...
      // unrelated code continues here


      I am getting the following error in the console:




      Uncaught TypeError: Cannot assign to read only property 'window' of object '#'
      at Object. (index.js:10)
      at Object../src/index.js (index.js:35)
      at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
      at fn (bootstrap 8babaf20081f9cc7653e:111)
      at Object.0 (index.js:35)
      at webpack_require (bootstrap 8babaf20081f9cc7653e:698)
      at bootstrap 8babaf20081f9cc7653e:796
      at bootstrap 8babaf20081f9cc7653e:796




      Is there a known workaround for setting global window variables (IndexedDBShim seems to require it) using webpack? Setting it using the browser console seems to work as expected.







      javascript webpack create-react-app






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 27 '18 at 19:40









      Miha ŠušteršičMiha Šušteršič

      3,834114782




      3,834114782
























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