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React - how to create dynamic table (with dynamic header)

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Created by:
jarlh
325

In this article, we would like to show you how to create a dynamic table in React.

Below example uses the following concept:

  • table is described by columns and data properties,
  • table is composed of header and data parts,
  • the column array allows us to decide which column names we want to display in the data rows, 
  • using map() function we are able to reduce the amount of code – columns and data arrays are mapped into React components.

Note:

Remember that each element should have a unique key - it helps React optimally manage changes in the DOM. Such a key may be for example the path assigned to each element of the table.

Runnable example:

// ONLINE-RUNNER:browser;

// Note: Uncomment import lines during working with JSX Compiler.
// import React from 'react';
// import ReactDOM from 'react-dom';

const tableStyle = {
  border: "1px solid black",
  borderCollapse: "collapse",
};

const tdStyle = {
  border: "1px solid black",
};

const Table = ({ id, columns, data }) => (
  <table style={tableStyle}>
    <tbody>
      <tr>
        {columns.map(({ path, name }) => (
          <th style={tdStyle} key={path}>{name}</th>
        ))}
      </tr>
      {data.map((rowData) => (
        <tr key={rowData[id]}>
          {columns.map(({ path }) => (
            <td style={tdStyle} key={path}>
              {rowData[path]}
            </td>
          ))}
        </tr>
      ))}
    </tbody>
  </table>
);

// Example use --------------------

const App = () => {
  const columns = [
    { path: "id",   name: "ID" },
    { path: "name", name: "Name" },
    { path: "age",  name: "Age" },
  ];

  const data = [
    { id: 1, name: 'Kate',  age: 25, favFruit: '🍏' },
    { id: 2, name: 'Tom',   age: 23, favFruit: '🍌' },
    { id: 3, name: 'Ann',   age: 26, favFruit: '🍊' },
    { id: 4, name: 'Jack',  age: 21, favFruit: '🍒' }
  ];

  return (
    <div>
      <Table id="id" columns={columns} data={data} />
    </div>
  );
};

const root = document.querySelector('#root');
ReactDOM.render(<App />, root );

References

ReactJS

React - dynamic table (with dynamic header)
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