if (typeof window.ethereum !== 'undefined') { console.log('MetaMask is installed!'); } Use code with caution. Copied to clipboard 2. Request Accounts
This project provides the foundational JavaScript logic required to bridge a web browser with the MetaMask wallet. It handles the "handshake" between your decentralized application (dApp) and the user's blockchain account. 📂 Core Components The contents typically include:
: Functions to detect window.ethereum and request account access. metamask_api_js_page.zip
: Never store private keys or sensitive data within these client-side JS files.
To see the user's wallet address, you must trigger a permission request. javascript if (typeof window
: Boilerplate code for sending ETH or interacting with smart contract functions.
Good dApps stay in sync. Use these listeners to keep the UI accurate: To see the user's wallet address, you must
const accounts = await ethereum.request({ method: 'eth_requestAccounts' }); const account = accounts[0]; Use code with caution. Copied to clipboard 3. Handle Changes