In existing code I want to use localForage but my problem is that localForage is asynchronous but existing code is synchronous. below is the sample code.

var testValue="Test value";
 var testKey="TestKey";
 localForage.setItem(testKey, testValue);
 
 var valueFromLocalForage="";
 localForage.getItem(testKey).then(function(data){
        valueFromLocalForage=data;
        console.log(valueFromLocalForage);
 });
 
 //other code
 console.log(valueFromLocalForage);

first it print blank after that it print the value from localforage.

I want my other code should wait, I don't want to change whole code. I can't use async and await because calling method is not async. I am using angular. Please suggest