<div class="animatable-element supersonic-element">
  I'm an animatable element, start scrolling to see me animating<br />
  Once I will be played to the end I will stop rendering
</div>

<div class="animatable-element-2 supersonic-element">
  I'm an animatable element, start scrolling to see me animating<br />
  I am rendering as usual
</div>

<div class="start supersonic-driver">
  I'm a driver, I start an animation when I appear
</div>

<div class="end supersonic-driver">
  I'm a driver, I finish an animation when I appear
</div>

.start {
  position: absolute;
  top: 100vh;
}

.end {
  position: absolute;
  top: 200vh;
}

.animatable-element,
.animatable-element-2 {
  position: fixed;
  left: 18px;
  top: 50%;
  z-index: 10;

  animation-name: animation;
  animation-duration: 10s; /* This is required */
  animation-play-state: paused; /* This is required, playback is controlled by plugin */
  animation-timing-function: linear; /* This is recommended so that your animation will be consistent */
  animation-fill-mode: forwards; /* This is recommended so that your animation holds last frame on finish */
}

.animatable-element-2 {
  left: auto;
  right: 18px;
}

@keyframes animation {
  to {
    scale: 1.5;
  }
}

import { TheSupersonicPlugin } from "https://esm.sh/the-supersonic-plugin-for-scroll-based-animation@2.1.0";

new TheSupersonicPlugin([
  {
    // This made for educational purpose. If you have 1 driver controlling multiple animations and you want to control one of them, it's better to use animation hooks, see next example
    start: ".start",
    end: ".end",
    elements: [".animatable-element"],
    hooks: {
      onBeforeInit(driver) {
        driver.data.isRendering = true; // It's not a part of library, it's a custom variable, you can create any
      },
      onBeforeRender(driver) {
        if (driver.progress === 1) driver.data.isRendering = false;
        return driver.data.isRendering; // Returning false prevents driver from rendering
      }
    }
  },
  {
    start: ".start",
    end: ".end",
    elements: [".animatable-element-2"]
  }
]);