@animxyz/core

AnimXYZ is a composable animation library that makes your site shine.

See animxyz.com for full documentation.

Testing

Tests live in test/ and run on the plain Node.js test runner (node:test, no extra framework). From this package directory:

npm test

or from the repo root:

npm test -w @animxyz/core
# or
turbo run test

turbo run test builds this package first (the test task depends on ^build in turbo.json), so the snapshot and size-budget tests always run against freshly built output.

What's covered:

• Compile test (test/compile.test.js) — build.scss compiles without errors, and without any Sass deprecation warnings (build.scss uses @use, not @import).

• Mixin API tests (test/mixin-api.test.js) — small fixture .scss files under test/fixtures/ @use the source directly and invoke the public mixins/functions (xyz-utility, xyz-var, xyz-set-all, xyz-animation, xyz-make-keyframes), asserting they compile and spot checking emitted declarations. test/fixtures/xyz-apply.scss documents a known bug (tracked by work brief A2, fix/xyz-apply): the mixin currently always errors due to swapped constructor arguments. Once A2 lands, flip that test from asserting the @error to asserting a successful compile. test/fixtures/xyz-time-levels-override.scss proves that $xyz-duration-levels / $xyz-delay-levels / $xyz-stagger-levels remain independently !default-overridable after being derived from the shared $xyz-time-levels map (work brief A3).

• Snapshot test (test/snapshot.test.js) — compiles build.scss (expanded), normalizes it (strips comments, collapses whitespace, reflows to one declaration per line for reviewable diffs), and compares it against the committed test/__snapshots__/animxyz.css. If you intentionally change compiled output, regenerate the snapshot with:

  npm run test:update-snapshot
  

  then review the resulting git diff and explain the change in your PR description — don't just regenerate and commit blindly.

• Size budget (test/size-budget.test.js) — asserts the gzipped size of dist/animxyz.min.css stays under a fixed byte budget (measured size + 10% headroom). If a change intentionally grows the output, remeasure and update BUDGET_BYTES in that file with justification in the PR.

Building from source

This package requires Dart Sass to compile src/*.scss (see sass in devDependencies).

Minimum Dart Sass version: 1.57.0. The source uses sass:string's string.split(), which was added in Dart Sass 1.57. If you @use this package's src/*.scss directly (rather than consuming the prebuilt dist/animxyz.css), make sure your own Sass compiler is at least 1.57.