How to fix 'ERROR TypeError: Object(...) is not a function'?

Question

I am creating a new application and I want to parse an array into a "json" file in ionic 3 but it says ERROR TypeError: Object(...) is not a function; What can I do to solve this problem?

if(this.file) {
  console.log(this.userJsonUrl);
  this.file.writeFile(this.file.dataDirectory, "users.json", "Hello world",
    { replace: true }).then(done => alert('ok')).catch(err => alert('ok'))
  console.log('File created')
}

and this is the full error

ERROR TypeError: Object(...) is not a function at File.get [as dataDirectory] (index.js:649)
at RegisterPage.webpackJsonp.204.RegisterPage.register (register.ts:62)
at Object.eval [as handleEvent] (RegisterPage.ngfactory.js:116)
at Object.handleEvent (core.es5.js:12023)
at Object.handleEvent (core.es5.js:12756)
at dispatchEvent (core.es5.js:8615)
at core.es5.js:9226
at HTMLButtonElement. (platform-browser.es5.js:2651)
at t.invokeTask (polyfills.js:3)
at Object.onInvokeTask (core.es5.js:3881)

can you provide the code?

Ala A.
– Ala A.

2019-04-26 16:27:44 +00:00
Commented Apr 26, 2019 at 16:27 — Ala A.
– Ala A., Commented Apr 26, 2019 at 16:27
show your code. How we can help you without it?

porgo
– porgo

2019-04-26 16:27:54 +00:00
Commented Apr 26, 2019 at 16:27 — porgo
– porgo, Commented Apr 26, 2019 at 16:27
i'm sorry its my first post ...

Revo
– Revo

2019-04-26 16:48:27 +00:00
Commented Apr 26, 2019 at 16:48 — Revo
– Revo, Commented Apr 26, 2019 at 16:48

Sudarshana Dayananda · Accepted Answer · 2019-04-27 02:26:17Z

1

This error is related to @ionic-native/file.

If you install @ionic-native/file using npm install --save @ionic-native/file uninstall it using npm uninstall --save @ionic-native/file.

As your app is using Ionic 3, you should install @ionic-native/file with @4.

npm install --save @ionic-native/file@4

answered Apr 27, 2019 at 2:26

Sudarshana Dayananda

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