bparallax (npm): A library giving parallax scrolling effects to elements (div, img, video etc). 
Keywords: parallax|scroll|effect|image|video|javascript|frontend|parallax-strength|smooth-parallax|window|img|css|transform|box-parallax-scroll|image-parallax|parallax-effect|parallax-javascript-library|parallax-scrolling|parallax-scrolling-images|video-parallax