accountsChanged : Triggered when the user swaps profiles in MetaMask. chainChanged : Triggered when the network is switched. 💡 Key Best Practices
: Always wrap API calls in try/catch blocks to handle user rejections (Error Code 4001 ). metamask_api_js_page.zip
: Functions to detect window.ethereum and request account access. accountsChanged : Triggered when the user swaps profiles
: Handlers for when a user switches accounts or changes networks (e.g., from Ethereum Mainnet to Polygon). const account = accounts[0]
: Never store private keys or sensitive data within these client-side JS files.
const accounts = await ethereum.request({ method: 'eth_requestAccounts' }); const account = accounts[0]; Use code with caution. Copied to clipboard 3. Handle Changes