1. Modules
  2. Vue

Modules

Vue

A collection of composable functions for implementing web3-onboard in to a Vue project; compatible both with Vue 2 + composition-api and Vue 3

Install

Quickstart

import { init } from '@web3-onboard/vue'
import injectedModule from '@web3-onboard/injected-wallets'

const injected = injectedModule()
const infuraKey = '<INFURA_KEY>'
const rpcUrl = `https://mainnet.infura.io/v3/${infuraKey}`

const web3Onboard = init({
  wallets: [injected],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      rpcUrl
    }
  ]
})

const { wallets, connectWallet, disconnectConnectedWallet, connectedWallet } = useOnboard()

if (connectedWallet) {
  // if using ethers v6 this is:
  // ethersProvider = new ethers.BrowserProvider(wallet.provider, 'any')
  const ethersProvider = new ethers.providers.Web3Provider(connectedWallet.provider, 'any')
  // ..... do stuff with the provider
}

Functions

init

The init function initializes web3-onboard and makes it available to the useOnboard() composable. For references check out the initialization docs for @web3-onboard/core

Example usage

import { init } from '@web3-onboard/vue'
import injectedModule from '@web3-onboard/injected-wallets'

const injected = injectedModule()
const infuraKey = '<INFURA_KEY>'
const rpcUrl = `https://mainnet.infura.io/v3/${infuraKey}`

const web3Onboard = init({
  wallets: [injected],
  chains: [
    {
      id: '0x1',
      token: 'ETH',
      label: 'Ethereum Mainnet',
      rpcUrl
    }
  ]
})

useOnboard

useOnboard must be used after the init function has been called - it will return an object that can be destructured to obtain the following reactive variables and functions:

Example usage

import { useOnboard } from '@web3-onboard/vue'
// Use the composable
const onboard = useOnboard()
// Or destructure it
const { wallets, connectWallet, disconnectConnectedWallet, connectedWallet } = useOnboard()
// do stuff

connectWallet

Function to open the onboard modal and connect to a wallet provider. For reference check out the connecting a wallet for @web3-onboard/core

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectWallet } = useOnboard()
    const connect = async () => connectWallet()
    return { connect }
  }
}
</script>

<template>
  <button type="button" @click="connect">Connect to a Wallet</button>
</template>

connectedChain

Computed property that contains the current chain to which connectedWallet is connected

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectedChain } = useOnboard()
    return { connectedChain }
  }
}
</script>

<template>
  <span>Connected Chain: {{ connectedChain.id }}</span>
</template>

connectedWallet

Computed property that contains the latest connected wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectedWallet } = useOnboard()
    return { connectedWallet }
  }
}
</script>

<template>
  <span>Connected Wallet: {{ connectedWallet.label }}</span>
</template>

connectingWallet

Readonly boolean ref that tracks the state of the wallet connection status

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { connectingWallet } = useOnboard()
    return { connectingWallet }
  }
}
</script>

<template>
  <span v-if="connectingWallet">Connecting...</span>
</template>

disconnectWallet

Function to disconnect a specific wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { disconnectWallet } = useOnboard()
    const disconnect = async () => disconnectWallet('MetaMask')
    return { disconnect }
  }
}
</script>

<template>
  <button type="button" @click="disconnect">Disconnect MetaMask</button>
</template>

disconnectConnectedWallet

Function to disconnect the connectedWallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { disconnectConnectedWallet } = useOnboard()
    return { disconnectConnectedWallet }
  }
}
</script>

<template>
  <button type="button" @click="disconnectConnectedWallet">Disconnect connectedWallet</button>
</template>

getChain

Function that returns the current chain a wallet is connected to

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { getChain } = useOnboard()
    return { getChain }
  }
}
</script>

<template>
  <span>MetaMask is connected to: {{ getChain('MetaMask') }}</span>
</template>

setChain

Function to set the chain of a wallet

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { setChain } = useOnboard()
    const set = () => setChain({ wallet: 'MetaMask', chainId: '0x1' })
    return { set }
  }
}
</script>

<template>
  <button type="button" @click="set">Set MetaMask chain to mainnet</button>
</template>

settingChain

Readonly boolean ref that tracks the status of setting the chain

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { settingChain } = useOnboard()
    return { settingChain }
  }
}
</script>

<template>
  <span v-if="settingChain">Setting chain...</span>
</template>

wallets

Readonly ref that contains every wallet that has been connected

Example usage

<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { wallets } = useOnboard()
    return { wallets }
  }
}

alreadyConnectedWallets

Readonly ref that contains every wallet that user connected to in the past; useful to reconnect wallets automatically after a reload

Example usage

vue
<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { alreadyConnectedWallets } = useOnboard()
    return { alreadyConnectedWallets }
  }
}
</script>

<template>
  <div v-for="wallet in wallets">
    <span>Label: {{wallet.label}}</span>
  </div>
</template>

lastConnectedTimestamp

Readonly ref that contains the last time that the user connected a wallet in milliseconds

Example usage

vue
<script>
import { useOnboard } from '@web3-onboard/vue'
export default {
  setup() {
    const { lastConnectedTimestamp } = useOnboard()
    return { lastConnectedTimestamp }
  }
}
</script>

<template>
  <span>Your last connection timestamp was: {{ lastConnectedTimestamp }}</span>
</template>

Build Environments

Many of the wallet modules require dependencies that are not normally included in browser builds (namely the node builtin modules such as crypto, buffer, util etc). If you are having build issues you can try the following bundler configs to resolve these dependency issues:

Webpack 4

Node built-ins are automatically bundled in v4 so that portion is handled automatically.

web3auth and torus will require a Babel to compile from es6 if not already supported. See config for Babel and Webpack4 as follows

npm i --save-dev @babel/cli @babel/core @babel/node @babel/plugin-proposal-nullish-coalescing-operator @babel/plugin-proposal-optional-chaining @babel/plugin-syntax-bigint @babel/register AND npm i babel-loader

babel.config.js

module.exports = (api) => {
  api.cache(true)
  const plugins = [
    '@babel/plugin-proposal-optional-chaining',
    '@babel/plugin-proposal-nullish-coalescing-operator',
    '@babel/plugin-syntax-bigint'
  ]
  return { plugins }
}

webpack.config.js

config.module.rules = [
  ...otherModuleRules,
  {
    test: /\.js$/,
    exclude: (_) => !/node_modules\/(@web3auth|@ethereumjs)/.test(_),
    loader: 'babel-loader'
  }
]

Webpack 5

You'll need to add some dev dependencies with the following command:

npm i --save-dev assert buffer crypto-browserify stream-http https-browserify os-browserify process stream-browserify util path-browserify

Then add the following to your webpack.config.js file:

const webpack = require('webpack')

module.exports = {
  resolve: {
    fallback: {
      path: require.resolve('path-browserify')
    },
    alias: {
      assert: 'assert',
      buffer: 'buffer',
      crypto: 'crypto-browserify',
      http: 'stream-http',
      https: 'https-browserify',
      os: 'os-browserify/browser',
      process: 'process/browser',
      stream: 'stream-browserify',
      util: 'util'
    }
  },
  experiments: {
    asyncWebAssembly: true
  },
  plugins: [
    new webpack.ProvidePlugin({
      process: 'process/browser',
      Buffer: ['buffer', 'Buffer']
    })
  ]
}

Vite

Add the following dev dependencies:

npm i --save-dev rollup-plugin-polyfill-node

Then add the following to your vite.config.js file:

import nodePolyfills from 'rollup-plugin-polyfill-node'

const MODE = process.env.NODE_ENV
const development = MODE === 'development'

export default {
  // other config options
  plugins: [
    development &&
      nodePolyfills({
        include: ['node_modules/**/*.js', new RegExp('node_modules/.vite/.*js')],
        http: true,
        crypto: true
      })
  ],
  resolve: {
    alias: {
      crypto: 'crypto-browserify',
      stream: 'stream-browserify',
      assert: 'assert'
    }
  },
  build: {
    rollupOptions: {
      plugins: [nodePolyfills({ crypto: true, http: true })]
    },
    commonjsOptions: {
      transformMixedEsModules: true
    }
  }
}

Nuxt.js

Add the following to your nuxt.config.js:

build: {
  standalone: true,
}
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