https://facebook.github.io/react/docs/thinking-in-react.html
I'm at the end of this tutorial and I'm just not understanding how e.target.value works. Walk through the end of this tutorial and see the sample code that there is please. I'm newbie both to React and Javascript.
The e is the argument of an event handler you attach to a certain event on a certain component... in this case the onFilterTextInput event. Events are objects with certain properties, and e.target almost always represents a DOM element.
Thus e.target.value is the value property of some DOM element, in this case that means the text entered in the search input.
When you need to handle multiple controlled input elements, you can add a name attribute to each element and let the handler function choose what to do based on the value of event.target.name. By React DOC
So, 'e' stands for event and target is the element that triggered the event. I find pretty useful this explanation about the difference between event.target and event.currentTarget at W3Schools
eis the event, which in this case ischange,targetis the element that triggered the event, which in this case is theinput, andvalueis the value of theinputelement