Property ‘subscribe’ does not exist on type ‘void’.

by

When you encounter the error message “property ‘subscribe’ does not exist on type ‘void'”, it means that you are trying to call the ‘subscribe’ property on a value or function that does not return anything. In TypeScript, void is a type that represents the absence of any value.

Here’s an example: 

// Define a function that does not return anything
function greet(): void {
  console.log("Hello, world!");
}

// Call the function
greet();

// Access the 'subscribe' property on the function
greet().subscribe(); // This will throw the error "property 'subscribe' does not exist on type 'void'".

The above code snippet demonstrates the error. The function ‘greet’ does not return anything, declared with the return type ‘void’. Therefore, you cannot access the ‘subscribe’ property on the function since it does not exist.

To fix this error, you either need to change the return type of the function to something other than ‘void’ or make sure you are calling the ‘subscribe’ property on a value that actually returns an observable, promise, or any other valid object with a ‘subscribe’ method.

Leave a comment