FAQ
Which scaffold should I choose?
There is one current scaffold: a generic button experiment. Add custom components, product data helpers, or API calls inside the generated project when the experiment needs them.
Why does pnpm start 0 watch v1?
The command argument is a zero-based index. 0 maps to v1, 1 maps to v2, and so on.
Does Preact need to exist on the target page?
No. Each IIFE bundle includes Preact and imported component styles.
Where should selectors live?
Keep them in src/config.js as selectors.primary and ordered selectors.fallbacks. Pass both to mountExperiment().
Why did setupTracking() do nothing?
It returns silently when options.selector does not match inside the container. Call it after render() and verify the selector. The default is 'a'; the generated button scaffold passes 'button'.
Can I add E2E tests later?
Yes. Run pnpm add-e2e from a current generated project, or pnpm exec exp-add-e2e after upgrading an older project to the current package.
What AI support can I add?
New projects include tracked AGENTS.md and CLAUDE.md files. They point coding tools to the version-matched documentation installed with the framework. Older projects can add them with pnpm exec exp-init-agents and pnpm exec exp-init-claude. See AI Project Support.
What does includeEmergencyBrake do?
The build includes the setting in the bundle. When runtime.includeEmergencyBrake is true, runScript() checks the Adobe Target emergency-brake configuration before running the experiment.
Why does pnpm live fail before opening a browser?
Common causes are a missing Chromium install, an invalid targetUrl, no matching selector, or a variation index that does not exist. Run pnpm dlx playwright install chromium for the browser.
Can I use JavaScript template literals?
Yes. The generated Vite build follows normal JavaScript handling for template literals.
Where is Stylelint?
It is not generated. Biome checks JavaScript, JSX, and JSON; Sass compiles SCSS during the build. Follow the SCSS Modules conventions.
See Error Reference for command-specific failures.