How to add new row on button click in react js?

August 16, 2024

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To add new row on button click in react js, you can use setRows([...rows, { id: rows.length + 1, name: '', age: '' }]);. It will add new row on button click in react js.

Today, I am going to show you, how to add new row on button click in react js.

Table of contents

Install and create a new React app.
Import react component.
Create a Component.

Let’s start with the first step.

Step 1: Install and create a new React app.

First you have to install the React project. You should use create-react-app command to create a new React project.

npx create-react-app my-app
cd my-app
npm start

Step 2: Import react component.

After installing, you have to import your React component.

import React, { useState } from 'react';

Step 3: Create a Component.

You can use setRows([...rows, { id: rows.length + 1, name: '', age: '' }]); to add new row on button click in react js.

 <div>
    <h3>Dynamic Rows</h3>
      <table border="1" style={{ width: '100%', textAlign: 'left' }}>
        <thead>
          <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Age</th>
          </tr>
        </thead>
        <tbody>
          {rows.map((row, index) => (
            <tr key={index}>
              <td>{row.id}</td>
              <td>
                <input
                  type="text"
                  name="name"
                  value={row.name}
                  onChange={(event) => handleInputChange(index, event)}
                />
              </td>
              <td>
                <input
                  type="number"
                  name="age"
                  value={row.age}
                  onChange={(event) => handleInputChange(index, event)}
                />
              </td>
            </tr>
          ))}
        </tbody>
      </table>
  <button onClick={addRow}>Add Row</button>
</div>

Add new row on button click example.

The below code is an example of a React. You have to import react and set setRows([...rows, { id: rows.length + 1, name: '', age: '' }]); to add new row on button click in react js.

App.js


import React, { useState } from 'react';

function Add() {
  const [rows, setRows] = useState([]);

  const addRow = () => {
    setRows([...rows, { id: rows.length + 1, name: '', age: '' }]);
  };

  const handleInputChange = (index, event) => {
    const { name, value } = event.target;
    const newRows = [...rows];
    newRows[index][name] = value;
    setRows(newRows);
  };

  return (
    <div>
      <h3>Dynamic Rows</h3>
      <table border="1" style={{ width: '100%', textAlign: 'left' }}>
        <thead>
          <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Age</th>
          </tr>
        </thead>
        <tbody>
          {rows.map((row, index) => (
            <tr key={index}>
              <td>{row.id}</td>
              <td>
                <input
                  type="text"
                  name="name"
                  value={row.name}
                  onChange={(event) => handleInputChange(index, event)}
                />
              </td>
              <td>
                <input
                  type="number"
                  name="age"
                  value={row.age}
                  onChange={(event) => handleInputChange(index, event)}
                />
              </td>
            </tr>
          ))}
        </tbody>
      </table>
      <button onClick={addRow}>Add Row</button>
    </div>
  );
}

export default Add;

In the above code example, I have used the setRows([...rows, { id: rows.length + 1, name: '', age: '' }]); to add new row on button click in react js.

Check the output of the above code.

All the best 👍