Instead of showing the data in the variable "ionic", there is a display of "[object object]"

Here is the code snippet I'm working with:

this.facebook.login(['email', 'public_profile']).then((response: FacebookLoginResponse) => {
      this.facebook.api('me?fields=id,name,email,first_name,picture.width(720).height(720).as(picture_large)', [])
      .then((profile: any) => {
        let userData = {
          email: profile['email'],
          first_name: profile['first_name'],
          picture: profile['picture_large']['data']['url'],
          username: profile['name'],
          id: profile['id']
        }
        alert(userData);

When I run this code in the emulator, the alert box displays:

[object object]

How can I fix this issue?

javascriptangulartypescriptionic3

Answer №1

When dealing with your userData that may be a JSON parsed object, it may display as [object object].

To address this issue, consider using alert(JSON.stringify(userData)).

If you only need to check the object data without alerting, you can simply use console.log(userData).

Answer №2

Make sure to utilize JSON.stringify method when presenting in an alert box.

 alert(JSON.stringify(userInfo));

Answer №3

To print the variable "userData" on the console, use the command "console.log(userData);" instead of "alert(userData);"

  • Using alert() can block the code execution and cannot be easily suppressed in a production environment
  • Console logging typically formats objects nicely and allows for easier traversal

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