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Sure! Here is a start to your React based JavaScript article.

Understanding the inner workings of React is crucial for anyone working with this JavaScript library extensively. React is an open-source, front end, JavaScript library that is used in designing user interfaces for single-page applications. It’s the view layer in the MVC (Model-View-Controller) model.

React allows developers to create large web applications which can change data, without reloading the page. It’s very fast and scalable. But, it can get very complicated when problems crop up. In this article, we will dissect one common problem and offer a solution.

Common Problem in React

It’s not uncommon, especially for beginners, to encounter issues with passing data between components. This is critical as React’s main purpose is to build UI components; it’s vital that components, be it parent to child, child to parent, or sibling to sibling, communicate. But how can we accomplish this?

Solution to the Problem

To solve this, we need to understand one fundamental concept about React: the data flow. In React, data is passed top-down (parent to child) via props. But what if we need to pass data from a child back to its parent? This is where we use a clever concept in React – Functions as Props.

Here’s how it works:

// Parent Component
class ParentComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      field: ''
    };
  }

  handleChange = (newData) => {
    this.setState({ field: newData});
  }

  render() {
    return (
      <div>
        <ChildComponent onChange={this.handleChange} />
      </div>
    );
  }
}

// Child Component
class ChildComponent extends React.Component {
  sendData = () => {
   this.props.onChange("Hello, parent!!"); 
  };

  render() {
    return (
      <div>
        <button onClick={this.sendData}>Click me!</button>
      </div>
    )
  }
}

In the above example, in the Parent Component we define a function, handleChange that calls this.setState() to update the state data. This function is then passed as a prop, to the Child Component.

React Libraries for Managing Data Flow

Although React’s inbuilt system for handling props is powerful, many developers look for more scalable solutions for managing data flow in larger applications. Redux and Mobx are two JavaScript libraries used with React that provide advanced state management.

  • Redux is a predictable state container for JavaScript apps based on the Flux design pattern. It allows the developer to manage the state of the application in a predictable way.
  • Mobx is a more straightforward library that carries out the same principles of Flux but in a conceptually simpler way by applying functional reactive programming.

To wrap things up, React provides a simple, effective way for components to communicate via props and functions. For large applications, leveraging powerful libraries like Redux or Mobx can greatly simplify state management. Keep exploring and happy coding!

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