Pass Props To Parent Component In React Js

Passing props from a child component to a parent component in React.js is a common practice in building dynamic and interactive web applications. While React follows a unidirectional data flow, there might be scenarios where you need to pass data back up the component tree. In this article, we'll explore the different techniques you can use to achieve this in your React.js projects.

One straightforward way to pass props to a parent component is by defining a callback function in the parent component and passing it down to the child component as a prop. Here's an example to illustrate this:

Parent Component:

function ParentComponent() {
  const handleChildProp = (data) => {
    console.log(data);
  };

  return (
    
  );
}

Child Component:

function ChildComponent({ passDataToParent }) {
  const sendDataToParent = () => {
    passDataToParent("Data from child component");
  };

  return (
    <button>Send Data to Parent</button>
  );
}

In this example, the ParentComponent function defines a handleChildProp function that handles the prop passed from the ChildComponent. The passDataToParent prop is the callback function that logs the data received from the child.

Next, in the ChildComponent function, we have a sendDataToParent function that triggers the passDataToParent callback function when a button is clicked, sending the specified data back to the parent component.

Another method to pass props to a parent component involves using the useContext hook, which allows you to share data across multiple components without having to pass props through every level of the component tree. Here's how you can implement this:

const DataContext = React.createContext();

function ParentComponent() {
  return (
     console.log(data)}>
      
    
  );
}

function ChildComponent() {
  const passDataToParent = useContext(DataContext);

  useEffect(() => {
    passDataToParent("Data from child component");
  }, [passDataToParent]);

  return (
    <div>Child Component</div>
  );
}

In this example, the DataContext is defined using React.createContext, and the ParentComponent wraps the ChildComponent with the DataContext.Provider, passing the required function to handle the data.

The ChildComponent consumes the DataContext using the useContext hook and calls the passDataToParent function within the useEffect hook to send the data to the parent component.

These are just a couple of methods you can employ to pass props to a parent component in React.js. Depending on your project requirements and complexity, you can choose the approach that best fits your needs. Experiment with these techniques, and enhance the interactivity of your React applications by effectively passing props between components.