Method step

benchmark/js/animator-dev.js:179–191

(timestamp)

    return new Promise(((resolve, reject) => {
      function step(timestamp) {
        startTime = startTime || timestamp
        const p = Math.min(1.0, (timestamp - startTime) / duration)

        update.call(self, easing ? easing(p) : p, p)

        if(p < 1.0) {
          return false
        }

        resolve(startTime + duration)
        return true
      }

      FrameManager.add(step)