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using ether js to connect to your Metamask Wallet.

Ether Js​

using HTML, Javascript & Ether Js to enter into the Web 3 world.

connectwallet.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>MetaMask Connection and Balance Example</title>

    <!-- Check if MetaMask is installed -->
    <script>
        window.addEventListener('DOMContentLoaded', () => {
            if (typeof window.ethereum === 'undefined') {
                alert('MetaMask not detected! Please install MetaMask.');
            }
        });
    </script>

    <!-- Include ethers.js script -->
    <script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js"></script>
</head>
<body>

    <button id="connectButton">Connect to MetaMask</button>

    <div id="result"></div>

    <script>
        document.getElementById('connectButton').addEventListener('click', async () => {
            try {
                // Check if MetaMask is installed
                if (typeof window.ethereum === 'undefined') {
                    alert('MetaMask not detected! Please install MetaMask.');
                    return;
                }

                // Request permission to connect MetaMask account
                await ethereum.request({ method: 'eth_requestAccounts' });

                // Create a Web3Provider using MetaMask's provider
                const provider = new ethers.providers.Web3Provider(window.ethereum);

                // Get the account signer
                const signer = provider.getSigner();

                // Get the current block number
                const blockNumber = await provider.getBlockNumber();

                // Get the balance of the connected account
                const address = await signer.getAddress();
                const balance = await provider.getBalance(address);
                const formattedBalance = ethers.utils.formatEther(balance);

                const resultDiv = document.getElementById('result');
                resultDiv.innerHTML = `
                    <p>Connected to MetaMask! Address: ${address}</p>
                    <p>Current Block Number: ${blockNumber}</p>
                    <p>Balance: ${formattedBalance} ETH</p>
                `;
            } catch (error) {
                console.error('Error connecting to MetaMask:', error);
                alert('Error connecting to MetaMask. Check the console for details.');
            }
        });
    </script>
    
</body>
</html>
Feel free to play around and edit this post as much you like.

Learn more on how to query the blockchain using EtherJs.