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@timothycarambat
Created September 18, 2021 01:22
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Easy Web3 Meta Mask Login - static HTML and Vanilla JS
<html>
<head>
<title>Web3 Metamask Login</title>
<link href="https://unpkg.com/tailwindcss@^2/dist/tailwind.min.css" rel="stylesheet">
</head>
<body class="flex w-screen h-screen justify-center items-center">
<div class="flex-col space-y-2 justify-center items-center">
<button id='loginButton' onclick="" class="mx-auto rounded-md p-2 bg-purple-500 text-white">
Login with MetaMask
</button>
<p id='userWallet' class='text-lg text-gray-600 my-2'></p>
</div>
<script>
window.userWalletAddress = null
const loginButton = document.getElementById('loginButton')
const userWallet = document.getElementById('userWallet')
function toggleButton() {
if (!window.ethereum) {
loginButton.innerText = 'MetaMask is not installed'
loginButton.classList.remove('bg-purple-500', 'text-white')
loginButton.classList.add('bg-gray-500', 'text-gray-100', 'cursor-not-allowed')
return false
}
loginButton.addEventListener('click', loginWithMetaMask)
}
async function loginWithMetaMask() {
const accounts = await window.ethereum.request({ method: 'eth_requestAccounts' })
.catch((e) => {
console.error(e.message)
return
})
if (!accounts) { return }
window.userWalletAddress = accounts[0]
userWallet.innerText = window.userWalletAddress
loginButton.innerText = 'Sign out of MetaMask'
loginButton.removeEventListener('click', loginWithMetaMask)
setTimeout(() => {
loginButton.addEventListener('click', signOutOfMetaMask)
}, 200)
}
function signOutOfMetaMask() {
window.userWalletAddress = null
userWallet.innerText = ''
loginButton.innerText = 'Sign in with MetaMask'
loginButton.removeEventListener('click', signOutOfMetaMask)
setTimeout(() => {
loginButton.addEventListener('click', loginWithMetaMask)
}, 200)
}
window.addEventListener('DOMContentLoaded', () => {
toggleButton()
});
</script>
</body>
</html>
@lmy-dawson
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Thanks very much

@DanielVera33
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@alwsyoung You have to open the server in your archive console, if you put this: python -m http.server
Then you go to chrome, firefox... etc and search localhost:8000
Its like emulate the web conection, if you think that, you are trying to conect metamask with nothing.

@WilliamLuppi
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It does not work! i can't connect metamask, nothing happends

@Swapnil15GitHub
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my task is when we click on metamask wallet button metamask extention will open ...

i am fresher i dont know how to do it please help me

@shivergard
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This is grate intro , but unsecured as hell... I just create extension that creates window. , not taking that data are added to windows params , but they are requested over script received over body (unclean playground to test it out : https://gist.github.com/shivergard/a9c0c0d18303e9b304876ded604f77f8)

is there are any secure sample around ?

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