version 19.8.5 causes TypeError: object.hasOwnProperty is not a function

[hixus]

💥 Regression Report

version 19.8.5 causes TypeError: object.hasOwnProperty is not a function when calling t-function.

Last working version

Worked up to version: 19.8.4

Stopped working in version: 19.8.5

To Reproduce

This is my config which works with old version.

import i18n from "i18next";
import { initReactI18next } from "react-i18next";
import * as dev from "../locales/dev.json";
import * as fi from "../locales/fi.json";

i18n
  .use(initReactI18next) 
  .init({
    resources: { fi, dev },
    lng: "fi",
    ns: ["default"], 
    defaultNS: "default",
    debug: true,
    keySeparator: false,
    interpolation: {
      escapeValue: false, 
    },
  });

export default i18n;

Expected behavior

T-function should work without throwing.

i18n.t('hello') // should not throw TypeError: object.hasOwnProperty is not a function 

Your Environment

• runtime version: i.e. node v14
• i18next version: i.e. 19.8.5 (react-i18next 11.8.5)
• os: Mac

[adrai]

Not able to reproduce it.
Can you create a reproducable example? Maybe directly on codesandbox?

[AdirAmsalem]

@adrai I saw you pushed a fix (thanks!) but our app still breaks with the new version.
Any chance it wasn't fully fixed? (the code attached uses i18next-react too)

[adrai]

@AdirAmsalem still waiting to be able to reproduce your issue...

[AdirAmsalem]

@adrai for us (I'm not with @hixus so maybe his issue is different) it fails specifically in tests, with the following configuration:
https://codesandbox.io/s/cool-noyce-xl9f3?file=/src/App.js

You can see that with i18next@19.8.4 it works, but if you'll change it to i18next@19.8.6 it'll fail.

I suspect it's related to the usage of Proxy here:

i18n.init({
  resources: new Proxy({}, { get: (_target, name) => name })
});

We do it for something in our tests that with a corresponding postProcessor allows us to validate the output in a customized way (for t(key, options)).

Btw, I know there's cimode which is similar, but this one allows us to do something more advanced which also includes the options etc.

Hope this helps, and thanks for your time!

[adrai]

Should be fixed with v19.8.7