How can I solve the issue of “only refers to a type, but is being used as a value here” in TypeScript?

323    Asked by Unnatigautam in Java , Asked on Jan 11, 2024

When I was attempting to write a program by using TypeScript I encountered a scenario where an error message occurred which was showing “ only refers to a type, but is being used as a value here” Explain to me the significance and meaning of this particular issue and how can I solve this particular issue? 

Answered by Delbert Rauch

 In the context of Java programming language, if you are getting the error message “ only refers to a type, but is being used as a value here” while using TypeScript, then this could be due to the mismatch between using a class or type name as value and type definition.

Here is the example given:-

Class MyClass {
    // Class Implementation
}
Const instance = new MyClass(); // Correct usage as a type definition
Const another instance = MyClass; // Incorrect usage as a value instead of a type

To resolve this particular issue, you should follow the following points or steps:-

Use the class name correctly

Firstly, ensure that you have used the class name correctly. It should be used with the ‘new’ keyword for creating the Instances.

Checking variable assignments

Ensure that the assignment is intended for creating an instance and should not try to reference the class name itself. You would need to correct each class name that is used Without the ‘new’ keyword.

Understanding type vs value context

The most important element of solving this particular issue is that you should know the context in which you are trying to use the class. Classes in statically may have both typed languages as a type a definition and as a constructor to create the Instances. Therefore, ensure that you are using them in the right context.

In this way, I would use these above steps, you can get rid of the issue of “only refers to a type, but is being used as a value here” in typescript.



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