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EnglishWhere to Get Started with Theatre.js
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The fastest way to start is the “Get started with Theatre.js” call-to-action on theatrejs.com, which leads into the official setup and tutorial path. Theatre.js is a JavaScript animation library with a visual editor that runs in the browser, so the intended workflow is: install the library in your project, open the editor, and start keyframing. It works with any stack because, as the site puts it, “all it does is change JS variables” — including custom THREE.js setups or your own WebGPU library.
What you’re actually getting started with
Theatre.js is described on its own site as “a javascript animation library with a professional motion design toolset,” aimed at everything from cinematic THREE.js scenes to UI interactions. The homepage demo is a 3D scene of a flying butterfly whose position and rotation are driven by keyframes in a sequence editor — a useful reference for what a finished setup looks like.
Two ideas shape how you should approach getting started:
- Code vs plus Art — the site frames this as “not either/or. Create in code, perfect in the browser.” You define the animation structure in code; you refine timing and values visually.
- Extensibility — official extensions and your own tools can move the camera, adjust lights, or tweak shaders, so the editor can match your workflow rather than the reverse.
The entry points to use
| Entry point | What it gives you | Best for |
|---|---|---|
| “Get started with Theatre.js” on theatrejs.com | The official starting path from the site itself | First contact, following the intended onboarding |
| GitHub repository (the site cites 7,700 GitHub stars) | Source, issues, and community activity — “We are building in the open” | Installation details, version history, reporting problems |
| The flying butterfly demo | A concrete example of keyframes driving a 3D object | Understanding what the editor controls before you wire up your own scene |
The site does not publish pricing or login requirements on the page evidence available, so treat access details as something to confirm at the source rather than assume.
A practical first session
- Install the library into an existing JavaScript project. Because Theatre.js only mutates JS variables, you don’t need to restructure your rendering stack first.
- Open the visual editor and block out a sequence. The site’s own advice is to “block out your sequence in seconds with our cutting-edge sequence editor.”
- Add flare with presets. Easing presets are listed as a first-class feature, so you can get motion feeling right before fine-tuning.
- Move to the graph editor when the rough timing works: “dive into the graph editor and fine-tune every frame.”
- Verify by checking that your animated values change as expected in your own scene — the butterfly demo is the reference for what correct keyframe-driven motion looks like.
Where people get stuck
- Expecting the editor to own your scene. It doesn’t. It changes variables; what you do with them is up to you. If nothing moves, the likely gap is between the animated value and the code that consumes it.
- Skipping the block-out phase. The dope sheet and sequence editor exist so you don’t hand-tune frames prematurely. Presets first, graph editor second.
- Assuming a specific stack. The site explicitly says it works with custom THREE.js setups and self-written WebGPU libraries, so a non-standard renderer is not a blocker.
If you want to see the toolset in action before committing, watch the butterfly sequence demo on the homepage — it shows the property editor, outline, and keyframe sequence working together on a real 3D object.