1. Overview
  2. Migration Guide from v1


Migration Guide from onboard.js to web3-onboard

Follow the steps below to easily migrate from onboard.js to Web3 Onboard.


With Web3 Onboard, we’ve introduced significant architectural changes that provide a more robust and efficient web3 onboarding experience. While this upgrade may result in breaking changes, the improved overall experience makes it worthwhile.


If you have bnc-onboard installed, you will need to install web3-onboard instead. The basic steps you need to take to get started are:

  1. Install npm i @web3-onboard/core. You can then go ahead and install other specific wallet modules you want (most likely npm i @web3-onboard/injected-wallets for browser wallet support).
  2. Initialize Onboard with the wallets you’ve installed along with the networks you would like to support.
  3. Make use of our API actions like await onboard.connectWallet() to allow a user to connect their wallets.

For a full code overview of the upgrade process using the React Hooks package please see this PR with special attention to the App.js and services.js files. To help you get started quickly we’ve put together a set of examples across multiple frameworks that includes the above-mentioned steps.

Package Upgrade - Modularization

This is the biggest change you might experience as an onboard.js user. With Web3 Onboard, we’ve separated all supported wallets into their modules, meaning you only need to integrate specific wallet modules you intend to support in your app. For example with Onboard, if you wanted to support only Metamask and Coinbase in your app, you had to install Onboard complete with all other wallets: npm install bnc-onboard. With Web3 Onboard, you only need to install core along with the desired wallet modules: npm i @web3-onboard/core @web3-onboard/injected-wallets @web3-onboard/coinbase This change allows us to support many web3 wallets without affecting the overall library performance.

Expansive Initialization Options

We’ve made initialization simpler while introducing more powerful options like Account Center and Notify in Web3 Onboard. Web3 Onboard now requires two compulsory initial setup options: wallets (Wallet modules, as shown above, to be initialized and added to wallet selection modal) and chains (EVM networks your app should work with). You can also pass multiple wallets and chains.

        const onboard = Onboard({
 wallets: [injected, coinbase],
 chains: [
     id: '0x1',
     token: 'ETH',
     label: 'Ethereum Mainnet',
     rpcUrl: MAINNET_RPC_URL


You can find the full list of initialization options in our docs here.

API Upgrades

We've also added a number of API enhancements to help you create an onboarding experience faster. For example, previously, you had to call walletSelect and walletCheck API to get a user connected: await onboard.walletSelect(); await onboard.walletCheck(); Now, you only need to call the connectWallet API:

await onboard.connectWallet()

Learn more about state changes tracked with the Web3 Onboard API here and the exposed actions you can use to modify the state here.

Framework Support

Although Web3 Onboard is still framework-agnostic, we’ve introduced a couple of framework-specific modules that are frequently asked for by our users.

@web3-onboard/react - React Hooks to connect users to web3 dapps better. You can check out a comprehensive React Hooks guide we've written on it.

@web3-onboard/vue - A set of reusable functions for integrating Web3 Onboard into a Vue 3 project. This is also compatible with a Vue 2 + composition-api dApp.

CSS Customizations

We've also added more expansive custom CSS properties so you can style every part of your onboarding experience to match the overall experience of your dApp. To apply Web3 Onboard CSS customizations, you don't need to attach them to the .bn-onboard-custom class like before. Instead, you can simply place them in the :root CSS pseudo-class, as shown below:

        :root {
 --onboard-success-100: #d1fae3;
 --account-center-z-index: 30
 --onboard-modal-color: #ffe5e6;
 --onboard-font-size-1: 3rem;
 --onboard-account-select-modal-z-index : 1;
/* COLORS */
 --account-select-modal-primary-100: #eff1fc;
 /* SPACING */
 --account-select-modal-margin-5: 0.5rem;


The full list of CSS variables for Web3 Onboard is available here.

Other Important Changes

There are also other notable infrastructural changes in Web3 Onboard:

  • Dynamic Imports of dependencies
  • Wallet Provider Standardization
  • Support for Chain ID in decimal format

Questions and Requests

If you have questions or requests, please feel free to drop by the community-support discord channel or create a PR or issue on GitHub.