Method tween

src/utils/Interface.js:332–370

(props, duration, ease, delay = 0, complete, update)

    }

    tween(props, duration, ease, delay = 0, complete, update) {
        if (!this.element) {
            return;
        }

        if (typeof delay !== 'number') {
            update = complete;
            complete = delay;
            delay = 0;
        }

        const style = getComputedStyle(this.element);

        for (const key in props) {
            let val;

            if (this.style[key] !== undefined) {
                val = this.style[key];
            } else if (~Transforms.indexOf(key) || ~Filters.indexOf(key) || ~Numeric.indexOf(key)) {
                val = ~Lacuna1.indexOf(key) ? 1 : 0;
            } else if (typeof style[key] === 'string') {
                val = parseFloat(style[key]);
            }

            if (!isNaN(val)) {
                this.style[key] = val;
            }
        }

        const promise = tween(this.style, props, duration, ease, delay, complete, () => {
            this.css(this.style);

            if (update) {
                update();
            }
        });

        return promise;
    }

    clearTween() {
        clearTween(this.style);