: Handlers for when a user switches accounts or changes networks (e.g., from Ethereum Mainnet to Polygon).
: Logic to update the "Connect Wallet" button based on the current connection status. 🚀 Getting Started 1. Detect the Provider The script first checks if MetaMask is installed. javascript metamask_api_js_page.zip
: Always wrap API calls in try/catch blocks to handle user rejections (Error Code 4001 ). : Handlers for when a user switches accounts
if (typeof window.ethereum !== 'undefined') { console.log('MetaMask is installed!'); } Use code with caution. Copied to clipboard 2. Request Accounts metamask_api_js_page.zip
: Never store private keys or sensitive data within these client-side JS files.