dillon1000/react

Improved for a better understanding (#8970)

* Improved for a better understanding

that code shouldn't name this parameter onchange. It is so confusing for a starter of ReactJs like me. It looks like that the onChange is an common event from props.

* Update the lifting state up paragraph

I tried to write something to explain to starter programmers in react, how we lift the state up calling a method defined by the ancestor and called by the children that will affect the children element.

* Rewrite Lifting State Up