Leveraging Currying to Optimize React

Introduction:

When working with forms in React, efficient and concise code is essential to improve readability and maintainability. In this article, we'll explore how currying can be used to optimize form handling in React components. We'll compare the initial implementation with the optimized version and discuss the benefits of using currying.

Initial Implementation

Initially,we create separate event handler functions for each input field, resulting in repetitive code. While this approach works, it can lead to code duplication and reduced maintainability as the number of form fields increases.

import React, { useState } from 'react';

function App() {
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const [notes, setNotes] = useState("");

  const handleNameChange = (e) => {
    setName(e.target.value);
  };

  const handleEmailChange = (e) => {
    setEmail(e.target.value);
  };

  const handleNotesChange = (e) => {
    setNotes(e.target.value);
  };

  return (
    <div>
      <input
        type="text"
        value={name}
        onChange={handleNameChange}
        placeholder="Name"
      />
      <br />
      <input
        type="email"
        value={email}
        onChange={handleEmailChange}
        placeholder="Email"
      />
      <br />
      <textarea
        value={notes}
        onChange={handleNotesChange}
        placeholder="Notes"
      ></textarea>
    </div>
  );
}

Optimized Implementation with Currying

To optimize the code, we can leverage currying to create a reusable event handler function. Currying allows us to generate specialized event handler functions on the fly by partially applying arguments. Here's the optimized implementation using currying:

// Optimized Implementation with Currying
// ...

const handleChange = (stateFunc) => (e) => {
  stateFunc(e.target.value);
};

// ...

<input
  type="text"
  value={name}
  onChange={handleChange(setName)}
  placeholder="Name"
/>

// ...

In the above, we define a single handleChange function that takes a stateFunc as an argument. This function returns a new function that is used as the onChange event handler for each input field. By currying the stateFunc, we create specialized event handlers for each input field without duplicating code.

Check Source Code here

Benefits of Currying

1. Code Reusability
2. Concise and Readable Code
3. Flexibility and Scalability

That's all, Bye & thanks