Add support for keep dragged div within bounds about angular2-draggable HOT 2 CLOSED

    try {
        // get current pos out of css
        let curPos = box.style.transform.split('(')[1].split(')')[0].split(', ');
        curPosX = Math.abs(curPos[0].split('px')[0]);
        curPosY = Math.abs(curPos[1].split('px')[0]);

        if(
            curPosX + 55 > (screensize.width/2) ||
            curPosY + 55 > (screensize.height/2)
        ) {
            // outside of window, reset to middle
            let value = "translate(" + 0 + "px, " + 0 + "px)";
            box.style.transform = value;
            box.style.webkitTransform = value;
            box.style.MozTransform = value;
            box.style.msTransform = value;
            box.style.OTransform = value;
            box.style['-moz-transform'] = value;
            box.style['-ms-transform'] = value;
            box.style['-o-transform'] = value;
        }
    } catch(ex) {
        console.log('transformation failed');
    }
}`