/TypeScript/Property '...' has no initializer and is not definitely assigned in the constructor

Property '...' has no initializer and is not definitely assigned in the constructor

Property 'firstName' has no initializer and is not definitely assigned in the constructor

 "angularCompilerOptions": {
    //   ...
    "strictPropertyInitialization": false
    //   ...
  }

Source: stackoverflow.com

Property '...' has no initializer and is not definitely assigned in the constructor

Just go to tsconfig.json and set

"strictPropertyInitialization": false
to get rid of the compilation error.

Otherwise you need to initialize all your variables which is a little bit annoying

Source: stackoverflow.com

Property '...' has no initializer and is not definitely assigned in the constructor

{
      ...
      "compilerOptions": {
            ....
            "noImplicitReturns": false,
            ....
            "strictPropertyInitialization": false
      },
      "angularCompilerOptions": {
         ......
      }  
 }

Source: stackoverflow.com

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