Apply, Call, and Bind Methods | Advanced JavaScript
https://jsfiddle.net/sathishkrcs/x581...
Use .bind() when you want that function to later be called with a certain context, useful in events. Use .call() or .apply() when you want to invoke the function immediately, and modify the context.
Call/apply call the function immediately, whereas bind returns a function that, when later executed, will have the correct context set for calling the original function. This way you can maintain context in async callbacks and events.
https://stackoverflow.com/questions/1...