How to implement search filter functionality in React JS ?

In React JS, search filter functionality involves dynamically filtering data displayed in components based on user input. It typically utilizes state management to track search query changes, updating the component's rendering to display only matching items in real time.

Prerequisites:

• React
• React useState

Approach to implement search filter functionality:

• State Initialization: Initialize the state variables productList and searchVal using the useState hook, with productList containing an array of product names.
• Search Functionality: Implement the handleSearchClick function to filter products based on the search input. If the search input is empty, reset the products to the original list.
• User Interface: Create a simple UI using an input field for search and the BsSearch icon from react-icons/bs. Display the filtered or original product list based on the search term.

Steps to Create React Application And Setting Up Project Module:

Step 1: Create a React application using the following command:

npx create-react-app project_name

Step 2: After creating your project folder i.e. project_name, jump into it by writing this command:

cd project_name

Step 3: After this, add react icons to the project by writing this command:

npm install react-icons --save

Project Structure:

The updated dependencies in package.json file will look like:

"dependencies": {
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-icons": "^4.12.0",
    "react-scripts": "5.0.1",
    "web-vitals": "^2.1.4",
}

Example: Below is the code example of search filter functionality.

import React, { useState } from 'react'
import './App.css';
import { BsSearch } from 'react-icons/bs';

function App() {
    const productList = ["blue pant"
        , "black pant"
        , "blue shirt"
        , "black shoes"
        , "brown shoes"
        , "white pant"
        , "white shoes"
        , "red shirt"
        , "gray pant"
        , "white shirt"
        , "golden shoes"
        , "dark pant"
        , "pink shirt"
        , "yellow pant"];
    const [products, setProducts] = useState(productList);
    const [searchVal, setSearchVal] = useState("");
    function handleSearchClick() {
        if (searchVal === "") { setProducts(productList); return; }
        const filterBySearch = productList.filter((item) => {
            if (item.toLowerCase()
                .includes(searchVal.toLowerCase())) { return item; }
        })
        setProducts(filterBySearch);
    }
    const mystyle = {
        marginLeft: "600px",
        marginTop: "20px",
        fontWeight: "700"
    };

    return (
        <div>
            <div style={mystyle}>
                <input onChange={e => setSearchVal(e.target.value)}>
                </input>
                <BsSearch onClick={handleSearchClick} />
            </div>
            <div>

                {products.map((product) => {
                    return (
                        <div style={mystyle}>{product}</div>
                    )
                })
                }

            </div>
        </div>
    );
}

export default App;

Steps to run the application: Type the following command in the terminal

npm start

Output: