Typescript permanent variable

Ionic Framework ionic-v3
1

Hello everyone,
In my project I have a simple counter in a button: when this button is clicked, the counter increments by 1. I need to permanently store this value, and now I’m using “storage.set” (retrieving it in another page with “storage.get”). But the storage works only on one sessione, because when I close and re-open the application, the counter starts again from zero. This is my code:


public counter = 0;

count(){
    this.counter+=1;
    this.storage.set('BadgeCount',this.counter);
    });
  }

So, the page reloads the public counter instead of using the value stored: how can I declare the variable and then use the one that is saved in the storage? Yes, is a silly and stupid question, but I’m new to the world of coding.

Thanks for your time!

2

how you define this.storage ?

You can try to use localStorage variable, this is persistent and will be available on next launch

count(){
    this.counter+=1;
    localStorage['BadgeCount']=this.counter;
}

make sure, that you set the initial value of the counter on the app launch:

constructor(){
    this.counter=localStorage['BadgeCount'];
}
3

I don’t believe this is true. iOS in particular may wipe localStorage whenever it feels it needs working space.

4

Hmm , i wasn’t aware of this, but after some research i can confirm what you are saying… What else do you recommend in this case then?

5

Use the default Ionic Storage with sqlite plugin.