What is Ethers.js?

Ethers.js is a JavaScript library that allows developers to interact with the Ethereum blockchain. It provides a simple and intuitive interface for tasks such as sending transactions, interacting with smart contracts, and managing wallets.

Browser Compatibility

Ethers.js is designed to work in modern web browsers, but there are several compatibility considerations to keep in mind:

1. Supported Browsers

Ethers.js works well with the latest versions of major web browsers, including:

  • Google Chrome
  • Mozilla Firefox
  • Microsoft Edge
  • Safari

It is recommended to use the latest stable versions of these browsers for the best performance and security.

2. JavaScript Features

Ethers.js utilizes modern JavaScript features such as Promises, async/await, and ES6 modules. Ensure that the browsers you are targeting support these features. Below are some specific considerations:

  • Async functions are supported in most modern browsers (Chrome 63+, Firefox 52+, Edge 16+, Safari 10.1+).
  • Promises are widely supported, but older browsers like Internet Explorer do not support them natively.

3. Polyfills for Older Browsers

If you need to support older browsers (like Internet Explorer), consider using polyfills. A popular polyfill library is polyfill.io, which can help add support for missing features. 

<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>

4. Using Ethers.js with Web3 Providers

Ethers.js can connect to Ethereum networks via different providers. When using a provider like MetaMask, ensure that users have the latest version of the wallet installed, as older versions may not support all features.

Sample Code: Using Ethers.js in the Browser

Here’s a simple example of how to use Ethers.js in a web application. This code snippet assumes you have included Ethers.js via a CDN: 


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Ethers.js Example</title>
    <script src="https://cdn.jsdelivr.net/npm/ethers@5.7.0/dist/ethers.umd.min.js"></script>
</head>
<body>
    <h1>Ethers.js Example</h1>
    <script>
        async function connect() {
            // Check if MetaMask is installed
            if (typeof window.ethereum !== 'undefined') {
                const provider = new ethers.providers.Web3Provider(window.ethereum);
                await window.ethereum.request({ method: 'eth_requestAccounts' });
                const signer = provider.getSigner ();
                console.log('Connected:', await signer.getAddress());
            } else {
                console.log('Please install MetaMask!');
            }
        }

        connect();
    </script>
</body>
</html>

Conclusion

Ethers.js is compatible with modern web browsers, but developers should be aware of the JavaScript features it uses and the need for polyfills in older browsers. By ensuring compatibility, you can create robust applications that leverage the power of the Ethereum blockchain.