Check if variable is of type Interface in TypeScript

typeOfInterface.ts

interface myInterface {
	myValue: any,
}

// The variable for which we will need to check the type
let myVariable: any | myInterface; 


// ...


//Check is myVariable is of type myInterface

if ((myVariable as myInterface).myValue != undefined){ 
	// Yes it is of type myInterface
	
	// We can then cast it to access the values
	const myVarWithMyInterf: myInterface = myVariable as myInterface;
	console.log(myVarWithMyInterf.myValue);
	
} else {
	// No it is not
}