Added broken website for sync

src/App.svelte

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+<script>
+  import svelteLogo from './assets/svelte.svg'
+  import viteLogo from '/vite.svg'
+  import ScrollTextComponent from './lib/ScrollTextComponent.svelte'
+</script>
+
+<main style="overflow: hidden; height: 100vh;">
+  <ScrollTextComponent />
+  <div style="background-color: black; height: 100px; width: 100%;">
+
+  </div>
+</main>
+
+<style>
+</style>
+

src/app.css

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+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+body {
+  padding: 0;
+  margin: 0;
+}

src/assets/svelte.svg

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+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="26.6" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 308"><path fill="#FF3E00" d="M239.682 40.707C211.113-.182 154.69-12.301 113.895 13.69L42.247 59.356a82.198 82.198 0 0 0-37.135 55.056a86.566 86.566 0 0 0 8.536 55.576a82.425 82.425 0 0 0-12.296 30.719a87.596 87.596 0 0 0 14.964 66.244c28.574 40.893 84.997 53.007 125.787 27.016l71.648-45.664a82.182 82.182 0 0 0 37.135-55.057a86.601 86.601 0 0 0-8.53-55.577a82.409 82.409 0 0 0 12.29-30.718a87.573 87.573 0 0 0-14.963-66.244"></path><path fill="#FFF" d="M106.889 270.841c-23.102 6.007-47.497-3.036-61.103-22.648a52.685 52.685 0 0 1-9.003-39.85a49.978 49.978 0 0 1 1.713-6.693l1.35-4.115l3.671 2.697a92.447 92.447 0 0 0 28.036 14.007l2.663.808l-.245 2.659a16.067 16.067 0 0 0 2.89 10.656a17.143 17.143 0 0 0 18.397 6.828a15.786 15.786 0 0 0 4.403-1.935l71.67-45.672a14.922 14.922 0 0 0 6.734-9.977a15.923 15.923 0 0 0-2.713-12.011a17.156 17.156 0 0 0-18.404-6.832a15.78 15.78 0 0 0-4.396 1.933l-27.35 17.434a52.298 52.298 0 0 1-14.553 6.391c-23.101 6.007-47.497-3.036-61.101-22.649a52.681 52.681 0 0 1-9.004-39.849a49.428 49.428 0 0 1 22.34-33.114l71.664-45.677a52.218 52.218 0 0 1 14.563-6.398c23.101-6.007 47.497 3.036 61.101 22.648a52.685 52.685 0 0 1 9.004 39.85a50.559 50.559 0 0 1-1.713 6.692l-1.35 4.116l-3.67-2.693a92.373 92.373 0 0 0-28.037-14.013l-2.664-.809l.246-2.658a16.099 16.099 0 0 0-2.89-10.656a17.143 17.143 0 0 0-18.398-6.828a15.786 15.786 0 0 0-4.402 1.935l-71.67 45.674a14.898 14.898 0 0 0-6.73 9.975a15.9 15.9 0 0 0 2.709 12.012a17.156 17.156 0 0 0 18.404 6.832a15.841 15.841 0 0 0 4.402-1.935l27.345-17.427a52.147 52.147 0 0 1 14.552-6.397c23.101-6.006 47.497 3.037 61.102 22.65a52.681 52.681 0 0 1 9.003 39.848a49.453 49.453 0 0 1-22.34 33.12l-71.664 45.673a52.218 52.218 0 0 1-14.563 6.398"></path></svg>

src/lib/Counter.svelte

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+<script lang="ts">
+  let count: number = 0
+  const increment = () => {
+    count += 10
+  }
+</script>
+
+<button on:scroll={increment}>
+  count is {count}
+</button>

src/lib/ScrollTextComponent.svelte

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+<script lang="ts">
+    let chunkSize: number = 750;
+    let chunks: number = 10;
+
+
+
+    export let allChunkHeight: number = chunkSize * chunks;
+    let scrollPosition: number = 0;
+
+    function handleScroll() {
+        const divElement = document.getElementById('scrollContainer');
+        scrollPosition = divElement.scrollTop;
+
+        let chunkProgress: number = scrollPosition % chunkSize;
+        if (chunkSize * 0.1 < chunkProgress 
+        && chunkProgress < chunkSize * 0.9){
+            divElement.style.color = "pink";
+        }
+        else{
+            divElement.style.color = "lightblue";
+        }
+    }
+</script>
+
+<style>
+    .container {
+        width: 100%;    
+        height: 100vh;
+        overflow-y: scroll;
+        z-index: 1;
+    }
+
+    .scrollText {
+        width: 100%;
+        background-color: darkslateblue;
+        padding: 0;
+        margin: 0;
+        z-index: 1;
+    }
+
+    .center-screen {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        width: 50px;
+        height: 100vh;
+        position:relative;
+        left:0;
+        right:0;
+        top: 0;
+        bottom: 0;
+        margin:auto;
+        z-index: 1;
+    }
+</style>
+
+<div style="height: 40vh;">
+    <div class="center-screen">
+        =================================================
+    </div>
+
+    <div class="container" id="scrollContainer" on:scroll={handleScroll}>
+        <div class="scrollText" style="height: {allChunkHeight}px;">
+            {#each {length: chunks} as _, i}
+                <div class="chunk" style="height: {chunkSize}px; z-index: 0;">
+                    {scrollPosition}
+                </div>
+            {/each}
+        </div>
+    </div>
+</div>

src/main.js

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+import './app.css'
+import App from './App.svelte'
+
+const app = new App({
+  target: document.getElementById('app'),
+})
+
+export default app

src/vite-env.d.ts

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+/// <reference types="svelte" />
+/// <reference types="vite/client" />