-
-
Notifications
You must be signed in to change notification settings - Fork 32.2k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
869692e
commit d67f4ff
Showing
7 changed files
with
96 additions
and
46 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| function easeInOutSin(time) { | ||
| return (1 + Math.sin(Math.PI * time - Math.PI / 2)) / 2; | ||
| } | ||
|
|
||
| function animate(prop, element, to, options = {}, cb = () => {}) { | ||
| const { | ||
| ease = easeInOutSin, | ||
| duration = 300, // standard | ||
| } = options; | ||
|
|
||
| let start = null; | ||
| const from = element[prop]; | ||
| let cancelled = false; | ||
|
|
||
| const cancel = () => { | ||
| cancelled = true; | ||
| }; | ||
|
|
||
| const step = timestamp => { | ||
| if (cancelled) { | ||
| cb(new Error('Animation cancelled')); | ||
| return; | ||
| } | ||
|
|
||
| if (start === null) { | ||
| start = timestamp; | ||
| } | ||
| const time = Math.min(1, (timestamp - start) / duration); | ||
|
|
||
| element[prop] = ease(time) * (to - from) + from; | ||
|
|
||
| if (time >= 1) { | ||
| requestAnimationFrame(() => { | ||
| cb(null); | ||
| }); | ||
| return; | ||
| } | ||
|
|
||
| requestAnimationFrame(step); | ||
| }; | ||
|
|
||
| if (from === to) { | ||
| cb(new Error('Element already at target position')); | ||
| return cancel; | ||
| } | ||
|
|
||
| requestAnimationFrame(step); | ||
| return cancel; | ||
| } | ||
|
|
||
| export default animate; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| import { assert } from 'chai'; | ||
| import animate from './animate'; | ||
|
|
||
| describe('animate', () => { | ||
| let container; | ||
|
|
||
| before(() => { | ||
| container = document.createElement('div'); | ||
| container.style.cssText = [ | ||
| 'height: 100px', | ||
| 'width: 100px', | ||
| 'overflow: scroll', | ||
| 'border: 1px solid #000', | ||
| ].join(';'); | ||
| const box = document.createElement('div'); | ||
| box.style.cssText = ['height: 100px', 'width: 1000px'].join(';'); | ||
| container.appendChild(box); | ||
| document.body.appendChild(container); | ||
| }); | ||
|
|
||
| after(() => { | ||
| document.body.removeChild(container); | ||
| }); | ||
|
|
||
| it('should work', done => { | ||
| container.scrollLeft = 200; | ||
| animate('scrollLeft', container, 300, {}, () => { | ||
| assert.strictEqual(container.scrollLeft, 300); | ||
| done(); | ||
| }); | ||
| }); | ||
| }); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters