CODEWITHSUNDEEP
typescript
Aunog
Aunog

Reputation: 47

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

I am new to TypeScript.Currently i am trying to learn the interface in TypeScript.Here is my code :

interface ClockInterface{
    currentTime:Date;
    setTime(d:Date):void;
}
class Clock implements ClockInterface{
    currentTime:Date;[**[ts] Property 'currentTime' has no initializer and is not definitely assigned in the constructor.]**
    setTime(d:Date){
        this.currentTime =d;
    }
    constructor(h: number, m: number) { }

}

Upvotes: 0

Views: 2957

Answers (3)

GMKHussain
GMKHussain

Reputation: 4661

Add (!) sing after name:

someField!: string;

OR

Open TypeScript config file

tsconfig.json and add this code to compiler options

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

Note: it will make static analysis weaker

Upvotes: 0

Shivam
Shivam

Reputation: 95

To remove this error go into the "tsconfig.json" and remove strict="true". It works for me, it checks strictnullcheck error.

Upvotes: 0

JB Nizet
JB Nizet

Reputation: 691625

You're in strict mode (specifically, the strictNullChecks option is true).

So a variable of type Date must be of type Date. It may not be null or undefined. Since you're not initializing the currentTime in the constructor, the variable is undefined until the setTime() method is called. So you're violating your type definition.

Either initialize the variable in the constructor, or change the type to Date | undefined, or change the compiler settings.

Upvotes: 1

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