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Prerequisites

Before you begin, make sure you have the following installed on your system. Node.js and npm: Download and install from nodejs.org

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Step 1: Create a New Next.js Project

Head to your preferred directory and create a new Next.js project using create-next-app with TypeScript template (you can use other templates or methods to start your project too): 
npx create-next-app@latest plugin-demo --typescript
cd plugin-demo
npm run dev

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Step 2: Add TypeScript Support

Create a type declaration file plugin.d.ts in your project’s /src/types folder: 
declare global {
  interface Window {
    Jupiter: JupiterPlugin;
  }
};
export {};

 declare global {
    interface Window {
        Jupiter: JupiterPlugin;
    }
}

export type WidgetPosition = 'bottom-left' | 'bottom-right' | 'top-left' | 'top-right';
export type WidgetSize = 'sm' | 'default';
export type SwapMode = "ExactInOrOut" | "ExactIn" | "ExactOut";
export type DEFAULT_EXPLORER = 'Solana Explorer' | 'Solscan' | 'Solana Beach' | 'SolanaFM';

export interface FormProps {
    swapMode?: SwapMode;
    initialAmount?: string;
    initialInputMint?: string;
    initialOutputMint?: string;
    fixedAmount?: boolean;
    fixedMint?: string;
    referralAccount?: string;
    referralFee?: number;
}

export interface IInit {
    localStoragePrefix?: string;
    formProps?: FormProps;
    defaultExplorer?: DEFAULT_EXPLORER;
    autoConnect?: boolean;
    displayMode?: 'modal' | 'integrated' | 'widget';
    integratedTargetId?: string;
    widgetStyle?: {
        position?: WidgetPosition;
        size?: WidgetSize;
    };
    containerStyles?: CSSProperties;
    containerClassName?: string;
    enableWalletPassthrough?: boolean;
    passthroughWalletContextState?: WalletContextState;
    onRequestConnectWallet?: () => void | Promise<void>;
    onSwapError?: ({
        error,
        quoteResponseMeta,
    }: {
        error?: TransactionError;
        quoteResponseMeta: QuoteResponse | null;
    }) => void;
    onSuccess?: ({
        txid,
        swapResult,
        quoteResponseMeta,
    }: {
        txid: string;
        swapResult: SwapResult;
        quoteResponseMeta: QuoteResponse | null;
    }) => void;
    onFormUpdate?: (form: IForm) => void;
    onScreenUpdate?: (screen: IScreen) => void;
}

export interface JupiterPlugin {
    _instance: JSX.Element | null;
    init: (props: IInit) => void;
    resume: () => void;
    close: () => void;
    root: Root | null;
    enableWalletPassthrough: boolean;
    onRequestConnectWallet: IInit['onRequestConnectWallet'];
    store: ReturnType<typeof createStore>;
    syncProps: (props: { passthroughWalletContextState?: IInit['passthroughWalletContextState'] }) => void;
    onSwapError: IInit['onSwapError'];
    onSuccess: IInit['onSuccess'];
    onFormUpdate: IInit['onFormUpdate'];
    onScreenUpdate: IInit['onScreenUpdate'];
    localStoragePrefix: string;
}

export { };

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Step 3: Embed the Plugin Script

For Next.js applications, you can add the script in two ways:

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Using App Router (Next.js 13+)

In your app/layout.tsx: 
import Script from "next/script";

export default function RootLayout({
  children,
}: {
  children: React.ReactNode;
}) {
  return (
    <html lang="en">
      <head>
        <Script
          src="https://plugin.jup.ag/plugin-v1.js"
          strategy="beforeInteractive"
          data-preload
          defer
        />
      </head>
      <body>{children}</body>
    </html>
  );
}

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Using Pages Router

In your pages/_app.tsx: 
import "@/styles/globals.css";
import type { AppProps } from "next/app";
import Script from "next/script";

export default function MyApp({ Component, pageProps }: AppProps) {
  return (
    <>
      <Script
        src="https://plugin.jup.ag/plugin-v1.js"
        strategy="beforeInteractive"
        data-preload
        defer
      />
      <Component {...pageProps} />
    </>
  );
}

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Step 4: Initialize Plugin

There are two ways to initialize Jupiter Plugin in a Next.js application:

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Method 1: Using Window Object

Create a new component for the plugin at components/plugin.tsx: 
"use client";

import React, { useEffect } from "react";

export default function PluginComponent() {
  useEffect(() => {
    if (typeof window !== "undefined") {
      window.Jupiter.init({
        displayMode: "widget",
        integratedTargetId: "jupiter-plugin",
      });
    }
  }, []);

  return (
    <div>
      <h1>Jupiter Plugin Demo</h1>
      <div
        id="jupiter-plugin"
      />
    </div>
  );
}

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Method 2: Using @jup-ag/plugin Package

WARNINGDo note that using this method will require you to maintain its dependencies.
1

Install the package:
npm install @jup-ag/plugin
2

Create a new component for the plugin at components/plugin.tsx:
"use client";

import React, { useEffect } from "react";
import "@jup-ag/plugin/css";

export default function PluginComponent() {
  useEffect(() => {
    import("@jup-ag/plugin").then((mod) => {
      const { init } = mod;
      init({
        displayMode: "widget",
        integratedTargetId: "jupiter-plugin",
      });
    });
  }, []);

  return (
    <div>
      <h1>Jupiter Plugin Demo</h1>
      <div id="jupiter-plugin" />
    </div>
  );
}

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Step 5: Add the Plugin Component to Your Page

In your app/page.tsx (or pages/index.tsx if you’re using Pages Router): 
import PluginComponent from '@/components/plugin';

export default function Home() {
  return (
    <div className="grid grid-rows-[20px_1fr_20px] items-center justify-items-center min-h-screen p-8 pb-20 gap-16 sm:p-20 font-[family-name:var(--font-geist-sans)]">
      <PluginComponent />
    </div>
  );
}
There you have it! You’ve successfully integrated Jupiter Plugin into your Next.js application.
  • Please test the swap functionality and check the transaction.
  • If you require more customizations, check out the Plugin Playground or the Customization documentation.
  • If you have any questions or issues, please refer to the FAQ or contact us on Discord.