callbag-ms-elapsed
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2.0.1 • Public • Published

callbag-ms-elapsed

Callbag listenable source which emits milliseconds elapsed since the subscription (using requestAnimationFrame) - useful for animations.

Example

import msElapsed from 'callbag-ms-elapsed'
import forEach from 'callbag-for-each'
import map from 'callbag-map'
import pipe from 'callbag-pipe'
import takeWhile from 'callbag-take-while'
 
const duration = ms =>
  pipe(
    msElapsed,
    map(elapsed => elapsed / ms),
    takeWhile(factor => factor <= 1),
  )
 
const distance = d => t => t * d
 
const moveBall = (ball, easing) => {
  pipe(
    duration(1000),
    map(easing),
    map(distance(400)),
    forEach(y => {
      ball.style.transform = `translate3d(0, ${y}px, 0)`
    }),
  )
}
 
const easeOut = p => 1 - (1 - p) * (1 - p)
 
moveBall(document.getElementById('ball'), easeOut)

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Install

npm i callbag-ms-elapsed

Weekly Downloads

2,541

Version

2.0.1

License

MIT

Unpacked Size

3.4 kB

Total Files

5

Last publish

Collaborators

  • andarist