BREAKING: no longer auto-start tweens by default when calling tween.update(). To restore previous behavior for the whole app, set the static Tween.autoStartOnUpdate property to true.

fix: make the end() method work better by setting the end time to start + duration instead of Infinity.

Full Changelog: https://github.com/tweenjs/tween.js/compare/v24.0.0...v25.0.0

This release finally deprecates usage of TWEEN as a default Group. All new Tweens now default to having no group, and must be explicitly added to a group if desired. Plus some other improvements to related to groups, including breaking changes (see below for all details and how to migrate if affected).

• Tiny readme fix for import-map example code. by @Bug-Reaper in https://github.com/tweenjs/tween.js/pull/685
• do not default to global TWEEN group for new Tweens, do not auto-add/remove tweens from groups, and update docs accordingly by @trusktr in https://github.com/tweenjs/tween.js/pull/688

• @Bug-Reaper made their first contribution in https://github.com/tweenjs/tween.js/pull/685

  feat: do not automatically add/remove a tween to/from its associated group, and do not automatically add new Tweens to the global TWEEN group by default.

feat: the tween.group(group) method now has a reciprocal tween.remove() method that will remove a tween from its associated group, and unassociate the group. tween.group() without an arg is no longer valid, see breaking changes and migration below.

fix: when a tween is stopped before its end time, do not allow its update method to continue, therefore preventing logic (f.e. repeat logic) from being triggered

docs: improved the docs, adding some missing information, removing all examples of the global TWEEN group which has been deprecated, and adding docs on how to manage groups of tweens. Also updated samples to use import syntax for importing Tween, avoiding the use of the TWEEN UMD global variable which has been deprecated.

feat: A new Group.allStopped() method returns true if all tweens in a group are not playing (i.e. stopped, and not paused), otherwise false. Useful for stopping an animation loop once all tweens in a group have finished their animation.

deprecated: Methods on TWEEN that come from Group are now deprecated to be removed in a future major version. Migrate forward by making a new Group instead of using TWEEN as a group.

deprecated: The UMD script that creates a global TWEEN variable is deprecated to be removed in a future major version.

deprecated: The CommonJS build is deprecated to be removed in a future major version.

BREAKING:

• Tweens are no longer automatically added or removed from groups by default when you call any Tween methods such as start(), stop(), or pause(), and the preserve parameter to Group.update() now defaults to true and is deprecated to be removed in a future major version.
  • MIGRATION: To keep old behavior for a while, explicitly call group.update() with false for the second parameter. To migrate forward, do not rely on automatic add/remove of tweens, and instead add/remove tweens to/from groups manually.
• Group.update() no longer returns a boolean indicating if all tweens have been removed.
  • MIGRATION: Don't rely on auto-add/remove to/from groups. This boolean return was previously useful for stopping an animation loop once all tweens were finished animating. Instead, use the new Group.allStopped() method to check if all tweens in a group are stopped in order to determine whether or not to continue an animation loop.
• The second group parameter to Tween.constructor now defaults to undefined instead of the global TWEEN group. Additionally it accepts a value of true to restore the old default behavior. The true value is deprecated and will be removed in a future major version.
  • MIGRATION: For the time being the parameter can be set to true to restore the old behavior. To migrate forward, use tween.group(group) or group.add(tween) instead.
• The argless tween.group() signature has been removed.
  • MIGRATION: Use group.add(tween) or group.remove(tween) instead. tween.group(TWEEN), TWEEN.add(tween), and TWEEN.remove(tween) will also work for now, but they are deprecated and will be removed in a future major version.
• Group.update's second parameter preserve defaults to true now, and is deprecated to be removed in a future major version, at which point tweens of a group will no longer be automatically added/remove to/from a group when calling any Tween methods such as start(), pause(), or stop().
  • MIGRATION: For now, explicitly set the parameter to false to restore old default behavior when calling group.update(). To migrate forward, do not rely on the automatic add/remove behavior, and instead manually add or remove tweens to or from groups.
• To make the fix for tween.update() to be a no-op for stopped tweens, we had to break an undocumented feature that allowed tweens to move backward in time (https://github.com/tweenjs/tween.js/pull/271).
  • MIGRATION: To move tweens backward in time after they have already completed, first call tween.start(startTime) then proceed to call tween.update(time) in reverse order as before (see the unit test with "go backward in time" in its name). Without calling tween.start() nothing will happen because stopped/completed tweens will now always return early from update(), as they are considered to be no longer running.

Full Changelog: https://github.com/tweenjs/tween.js/compare/v23.1.3...v24.0.0

Unfortunately we had to revert the fix for yoyo in v23.1.2 because it broke the yoyo demo. lol

• #687

So, this ironically fixes yoyo so that it is more fixed than how fixed we thought it was, and we will have to circle back to #677 again get yoyo even more fixed. 🥴

Full Changelog: https://github.com/tweenjs/tween.js/compare/v23.1.2...v23.1.3

• fix yoyo repeat bug by @humodz in https://github.com/tweenjs/tween.js/pull/683
• Change the Easing.Linear methods to pure function so that saving them to a variable and calling them won't error. F.e. this no longer errors: let in = TWEEN.Easing.Linear.In; in(). by @soumen-pradhan in https://github.com/tweenjs/tween.js/pull/682

• @humodz made their first contribution in https://github.com/tweenjs/tween.js/pull/682
• @soumen-pradhan made their first contribution in https://github.com/tweenjs/tween.js/pull/682

Full Changelog: https://github.com/tweenjs/tween.js/compare/v23.1.1...v23.1.2

What's Changed

• fixbug:when duration is negative,there should has no animate,not a bad result by @jackletter in https://github.com/tweenjs/tween.js/pull/669

New Contributors

• @jackletter made their first contribution in https://github.com/tweenjs/tween.js/pull/669

Full Changelog: https://github.com/tweenjs/tween.js/compare/v23.1.0...v23.1.1

What's Changed

• Add : tests for onRepeat callback by @MasatoMakino in https://github.com/tweenjs/tween.js/pull/609
• Handling of repeats with browser tab sleep by @MasatoMakino in https://github.com/tweenjs/tween.js/pull/564
  • When updates are skipped (f.e. due to requestAnimationFrame not firing for unfocused tabs) and then start firing again later, things now work (tweens can travel properly into the future).
• BREAKING: negative values for .delay() are no longer valid (it was not a documented feature). See df8214619f671162034b9c881f81eafcdcbcad92 for migration example.
• Update examples to avoid removed features by @trusktr

Full Changelog: https://github.com/tweenjs/tween.js/compare/v22.0.0...v23.0.0

But! Some people might still be using it, so:

Fixes

• Fix CJS entry point by @inukshuk in https://github.com/tweenjs/tween.js/pull/659, thanks!
  • BREAKING: This is a potentially breaking change because dist/index.cjs.js was renamed to dist/index.cjs. If you relied on dist/index.cjs.js, update your paths and you'll be good to go.

New Contributors

• @inukshuk made their first contribution in https://github.com/tweenjs/tween.js/pull/659

Full Changelog: https://github.com/tweenjs/tween.js/compare/v21.1.1...v22.0.0

Fixes:

• fix the exports field so that types will be discoverable by TypeScript out of the box when importing tween.js into a TS project. Thanks @tazyong @jramstedt @keiya01!

Docs:

• fix broken tutorial link. Thanks @victorbnl!

Full Changelog: https://github.com/tweenjs/tween.js/compare/v21.0.0...v21.1.1

Docs:

• bf50c1f529a96b646e3c5fffececb918c4ea7384- Chinese docs up to date with the latest English source. Thanks @mk965! 🎉

Possibly Breaking Change:

• 283e66e3b1d3c90cfd186b1b6ea83bb5c542cb56 - An exports field was added to package.json to make it compatible with ESM tools (to override the main field currently pointing at a CommonJS file which doesn't make sense for ESM, but does for old Node.js). To be safe, we made this a major version because there's a chance it can break someone's app (f.e. if they imported from dist/ directly, that will now be blocked, and they would need to change import ... from '@tweenjs/tween.js/dist/tween.esm.js' to import ... from '@tweenjs/tween.js'). Thanks for this @christjt!

You won't be able to outrun the fox!

Fixes

• Fixed the video_and_time example which sometimes didn't play a video.

Breaking changes:

• By default, the "dynamic to" feature is no longer enabled. To enable it, you must now enable it with tween.dynamic(true).

  Warning When dynamic is set to false, Tween makes a copy of the object passed into tween.to() and will never modify it (hence updating the original object from the outside is not dynamic). When dynamic is true, Tween uses the original object as the source of values during animation (every update reads the values, hence they can be modified dynamically) but note that in dynamic mode, Tween will modify any interpolation arrays of the object passed into tween.to() which may cause side-effects on any external code that may also rely on the same object. We've added two new dynamic_to examples. In each example, when dynamic is disabled, the fox cannot catch any rabbits. When dynamic is enabled, the rabbits have no chance!

• tween.to() now throws if it is called when a tween is started (even if paused). Call tween.stop() first before setting a new .to() value.