remotion-interactivity

The saved excerpt is a snapshot from review. The external source remains the complete and most current version.

---
name: remotion-interactivity
description: Structure Remotion markup for interactivity
version: 4.0.526
---

By writing Remotion markup in a specific way, the Remotion Studio is able to recognize the structure of the code and makes it interactive:

- Allowing items to be selected by clicking on them
- Allowing drag+drop, resizing and rotation
- Editing the CSS styles
- Making keyframes and easing values editable

If the markup is too complex for the Studio to make it interactive, then the values become grayed out.

## Make an HTML element interactive using `Interactive`

Every HTML and SVG element (except `<Img>`, it already is interactive) such as `<div>` can be turned interactive using `Interactive`:

```tsx title="Interactive elements"
<Interactive.Div
  name="Greeting card"
  style={{fontSize: 80, padding: 24}}
>
  Hello
</Interactive.Div>
```

This allows styles and keyframes to be set in the Studio. Be sensible, if a component has many elements, the timeline might get messy.

## Prefer inline text

If text is fixed and only used once, write it directly inside the interactive element instead of extracting it into a constant.

```tsx title="Inline text"
// 👍 Fixed copy stays editable
<Interactive.Div name="Title">
  Remotion Best Practices
</Interactive.Div>
```

Use a prop or variable only when the text is dynamic or reused.

## Give interactive elements a descriptive name

Add a `name` prop to elements to make them easily identifyable.
Avoid computed names, hardcode them.

```tsx title="Interactive names"
<>
  <Interactive.Div name="Hero title" style={{fontSize: 80}}>
    Launch day
  </Interactive.Div>
  <Img name="Avatar" src="https://remotion.media/image.jpeg" />
  <Video name="Background" src="https://remotion.media/video.mp4" />
  <Sequence name="Title">
    Launch day
  </Sequence>
</>
```

## Keep all CSS styles inline

The best way is to just pass a plain object to `style` - no referring to constants, no object spreading, no math.

```tsx title="Interactive example"
<Interactive.Div
  style={{
    fontSize: 80,
    color: 'red',
  }}
>
  Hello World!
</Interactive.Div>
```

```tsx title="❌ Bad for interactivity"
const baseStyle = useMemo(() => {
  return {
    fontSize: 12 // ❌ Non-inline styles are not supported
  }
}, []);

<Interactive.Div
  style={{
    ...baseStyle, // ❌ Spreading is not supported
    color: RED, // ❌ Referring to constants is not supported
    scale: frame * 10 // ❌ Math is not supported
  }}
>
  Hello World!
</Interactive.Div>
```

## Animate using `interpolate()`

Write animations as inline `interpolate()` calls on the property that changes.  
The output range, easing, extrapolation and `output` property should use hardcoded values.

The input range may additionally use `durationInFrames`, `fps`, `width` and `height` destructured directly from `useVideoConfig()`. Bare identifiers such as `durationInFrames`, multiplication with a number such as `2 * fps` or `fps * 2`, and subtraction of a number such as `durationInFrames - 1` are supported.

```tsx title="Inline values"
const {fps, durationInFrames} = useVideoConfig();

// 👍 Inline values can be standardized and keyframed
<Interactive.Div
  name="Product card"
  style={{
    color: 'white',
    fontSize: 80,
    scale: interpolate(frame, [0, fps], [0, 1], {
      easing: Easing.spring({damping: 200}),
      output: 'perceptual-scale',
      extrapolateLeft: 'clamp',
      extrapolateRight: 'clamp'
    }),
    rotate: interpolate(frame, [0, 1 * fps], ['0deg', '20deg'], {
      easing: Easing.spring({damping: 200}),
      extrapolateLeft: 'clamp',
      extrapolateRight: 'clamp'
    }),
    translate: interpolate(
      frame,
      [durationInFrames - 30, durationInFrames],
      ['0px 0px', '0px 120px'],
      {
        easing: Easing.spring({damping: 200}),
        output: 'perceptual-scale',
        extrapolateLeft: 'clamp',
        extrapolateRight: 'clamp'
      }
    ),
  }}
/>
```

```tsx title="❌ Bad interactivity"
const transl