So I am using bootstrap for responsiveness and I created a parallax class. It works fine on my laptop browsers when I resize the screens.
However when I open it on my mobile phone the image is just fixed.
here is the class
.parallax {
/* The image used */
background-image: url(......);
/* Set a specific height */
min-height: 350px;
/* Create the parallax scrolling effect */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}