just-animate/lib.es2015/lib/reducers/play.js

_Making Animation Simple_

import { loopOn } from '../core/timeloop';
import { S_PLAYING, _ } from '../utils/constants';
import { update } from './update';
import { PLAY } from '../actions';
export const play = (model, options, ctx) => {
    if (options) {
        model.repeat = options.repeat;
        model.yoyo = !!options.alternate;
        model.destroy = !!options.destroy;
    }
    model.repeat = model.repeat || 1;
    model.yoyo = model.yoyo || false;
    model.state = S_PLAYING;
    const isForwards = model.rate >= 0;
    if (isForwards && model.time === model.duration) {
        model.time = 0;
    }
    else if (!isForwards && model.time === 0) {
        model.time = model.duration;
    }
    loopOn(model.id);
    update(model, _, ctx);
    ctx.trigger(PLAY);
};