Part 1: Setting up the application

You can access Tezos through any JavaScript framework. This tutorial uses the Svelte framework, and the following steps show you how to start a Svelte application and add the Tezos-related dependencies.

Setting up the app

Run these commands to install Svelte with TypeScript and Vite:

npm create vite@latest bank-tutorial -- --template svelte
cd bank-tutorial
npm install

Install the Tezos-related dependencies:

npm install @taquito/taquito @taquito/beacon-wallet @airgap/beacon-types

Install the buffer, events, and vite-compatible-readable-stream libraries:
```
npm install --save-dev buffer events vite-compatible-readable-stream
```

Update the vite.config.js file to the following code:

import { defineConfig, mergeConfig } from "vite";
import path from "path";
import { svelte } from "@sveltejs/vite-plugin-svelte";

export default ({ command }) => {
  const isBuild = command === "build";

  return defineConfig({
    plugins: [svelte()],
      define: {
        global: {}
      },
    build: {
      target: "esnext",
      commonjsOptions: {
        transformMixedEsModules: true
      }
    },
    server: {
      port: 4000
    },
    resolve: {
      alias: {
        "@airgap/beacon-types": path.resolve(
          path.resolve(),
          `./node_modules/@airgap/beacon-types/dist/${
          isBuild ? "esm" : "cjs"
          }/index.js`
        ),
        // polyfills
        "readable-stream": "vite-compatible-readable-stream",
        stream: "vite-compatible-readable-stream"
      }
    }
  });
};

This updated file includes these changes to the default Vite configuration:

It sets the global object to {} so the application can provide the value for this object in the HTML file
It includes the a path to the Beacon SDK
It provides polyfills for readable-stream and stream

Update the default HTML file index.html to the following code:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script>
      const global = globalThis;
    </script>
    <script type="module">
      import { Buffer } from "buffer";
      window.Buffer = Buffer;
    </script>
    <title>Tezos Bank dApp</title>
  </head>
  <body>
    <script type="module" src="/src/main.js"></script>
  </body>
</html>

This updated file sets the global variable to globalThis and adds a buffer object to the window. The Beacon SDK requires this configuration to run in a Vite app.

Replace the src/main.js file with this code:

import './app.css'
import App from './App.svelte'

const app = new App({
  target: document.body,
})

export default app

Configuring Svelte

Svelte files include several different types of code in a single file. The application's files have separate sections for JavaScript, style, and HTML code, as in this example:

<script>
  // JavaScript or TypeScript code
</script>

<style>
  /* CSS or Sass code */
</style>

<main>
  <!-- HTML code -->
</main>

Svelte components are fully contained, which means that the style and code that you apply inside a component doesn't leak into the other components. Styles and scripts that are shared among components typically go in the src/styles and scripts or src/scripts folders.

Follow these steps to set up the src/App.svelte file, which is the main component and container for other Svelte components:

Replace the default src/App.svelte file with this code:
```
<script>
</script>

<main>
</main>

<style>
</style>
```

You will add code to connect to the user's wallet in the next section.

Setting up the app​

Configuring Svelte​

Setting up the app

Configuring Svelte