Why does 'property does not exist on type' error occur in typescript?

This error is due to TypeScript's static type checking. It signifies that you're trying to access a property that doesn't exist on a specific type.

Example:

  let user = { name: "John" };
  console.log(user.age);
  

Solution:

  let user = { name: "John", age: 30 };
  console.log(user.age);