React States in 5 Minutes — No BS, Just What You Need

The video begins by stating the necessity of using states to change the prop of a father component. The instructor then proceeds to import 'useState' from React and initializes a state variable 'fatherName' with an initial value of 'Alejandro'.

The core concept introduced is how a child component can modify the parent's state. This is achieved by passing the 'setFatherName' function (the setter for the 'fatherName' state) as a prop to the child component.

Inside the child component, an input field is created. An 'onChange' event listener is added to this input. When the input value changes, the 'setFatherName' function (received as a prop) is called with the new input value, effectively updating the father's name in the parent component.

The instructor demonstrates how typing into the input field in the child component instantly updates the father's name displayed by the parent component. This illustrates the flow of state change from child to father. The video concludes by summarizing that this process allows a child component to change the father's name using a state passed as a prop.