im having this errors when making an Ionic project-CodePudding

I have been a lot of time trying to create my project, but, Im having a lot of errors. I fix some ones but, when I thought everything was okay, IT WASN'T. Im learning this ionic and app development stuff and I didn't thoght "oh, maybe any video on youtube shows aaaaall that" it looked easy!

Okay, this it's the error after putting the

ionic start appname sidemenu

I choosed angular, then it last a few minutes in do all their stuff, and then, when i write

ionic serve

(the first thigs were okay but then this:)

 Build at: 2022-11-16T20:03:58.075Z - Hash: 87f644733fcc69d9 - Time: 32811ms
[ng]
[ng] Error: src/app/folder/folder.page.ts:10:10 - error TS2564: Property 'folder' has no initializer and is not definitely assigned in the constructor.
[ng]
[ng] 10   public folder: string;
[ng]             ~~~~~~
[ng]
[ng]
[ng] Error: src/app/folder/folder.page.ts:15:5 - error TS2322: Type 'string | null' is not assignable to type 'string'.
[ng]   Type 'null' is not assignable to type 'string'.
[ng]
[ng] 15     this.folder = this.activatedRoute.snapshot.paramMap.get('id');
[ng]        ~~~~~~~~~~~
[ng]
[ng]
[ng]
[ng] × Failed to compile.

And the server said "cannot get" with the window name like "error"

can someone iluminate me with their knowledge?(and sorry for my english XD)

CodePudding user response：

you may need to run the command ionic build before running ionic serve.

CodePudding user response：

Go to tsconfig.json file and in compilerOptions, turn off strictPropertyInitialization and strictNullChecks, like this:

"compilerOptions": {
    "strictPropertyInitialization": false,
    "strictNullChecks": false,
    ...
}