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JavaScript

AppKit provides seamless integration with multiple blockchain ecosystems. . It supports Wagmi and Ethers v6 on Ethereum, @solana/web3.js on Solana, as well as Bitcoin and other networks. AppKit Core with Universal Provider library, enable compatibility across any blockchain protocol. Choose one of these to get started.
We recommend using Vite to get started with AppKit JavaScript.

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Installation

npm install @reown/appkit @reown/appkit-adapter-wagmi wagmi viem

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Cloud Configuration

Create a new project on Reown Cloud at https://cloud.reown.com and obtain a new project ID.
Don’t have a project ID?Head over to Reown Cloud and create a new project now!

Get started

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Implementation

wagmi Example

Check the JavaScript wagmi example
For a quick integration, you can use the createAppKit function with a unified configuration. This automatically applies the predefined configurations for different adapters like Wagmi, Ethers, or Solana, so you no longer need to manually configure each one individually. Simply pass the common parameters such as projectId, chains, metadata, etc., and the function will handle the adapter-specific configurations under the hood.This includes WalletConnect, Coinbase and Injected connectors, and the Blockchain API as a transportIn your main.js file set up the following configuration.
import { createAppKit } from '@reown/appkit'
import { mainnet, arbitrum } from '@reown/appkit/networks'
import { WagmiAdapter } from '@reown/appkit-adapter-wagmi'

// 1. Get a project ID at https://cloud.reown.com
const projectId = 'YOUR_PROJECT_ID'

export const networks = [mainnet, arbitrum]

// 2. Set up Wagmi adapter
const wagmiAdapter = new WagmiAdapter({
  projectId,
  networks
})

// 3. Configure the metadata
const metadata = {
  name: 'AppKit',
  description: 'AppKit Example',
  url: 'https://example.com', // origin must match your domain & subdomain
  icons: ['https://avatars.githubusercontent.com/u/179229932']
}

// 3. Create the modal
const modal = createAppKit({
  adapters: [wagmiAdapter],
  networks: [mainnet, arbitrum],
  metadata,
  projectId,
  features: {
    analytics: true // Optional - defaults to your Cloud configuration
  }
})

// 4. Trigger modal programaticaly
const openConnectModalBtn = document.getElementById('open-connect-modal')
const openNetworkModalBtn = document.getElementById('open-network-modal')

openConnectModalBtn.addEventListener('click', () => modal.open())
openNetworkModalBtn.addEventListener('click', () => modal.open({ view: 'Networks' }))

// 5. Alternatively use w3m component buttons within the index.html file

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Importing networks

Reown AppKit use Viem networks under the hood, which provide a wide variety of networks for EVM chains. You can find all the networks supported by Viem within the @reown/appkit/networks path.
import { createAppKit } from '@reown/appkit'
import { mainnet, arbitrum, base, scroll, polygon } from '@reown/appkit/networks'
Looking to add a custom network? Check out the custom networks section.

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Trigger the modal

To open AppKit you can use our web component or build your own button with AppKit actions. In this example we are going to use the <appkit-button> component.Web components are global html elements that don’t require importing.
<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>HTML Example</title>
  </head>
  <body>
    <div id="app">
      <button id="open-connect-modal">Open Modal</button>
      <button id="open-network-modal">Open Networks</button>
      <appkit-button />
      <appkit-network-button />
    </div>
    <script type="module" src="main.js"></script>
  </body>
</html>
Learn more about the AppKit web components here

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Blockchain Interaction

You need to install @wagmi/core to interact with smart contracts:
npm install @wagmi/core
Wagmi actions can help us interact with wallets and smart contracts:For this use case, we need to import the wagmiConfigfrom our AppKit WagmiAdapter configuration.
import { readContract } from "@wagmi/core";
import { USDTAbi } from "../abi/USDTAbi";

const USDTAddress = "0x...";

const data = readContract(wagmiConfig, {
  address: USDTAddress,
  abi: USDTAbi,
  functionName: "totalSupply",
  args: [],
});
Read more about Wagmi actions for smart contract interaction here.