![]() ![]() The size of a user’s browser window will always be different.It’s also important to plan for the largest reasonable image size needed - although be sure to optimize any images used. ![]() When choosing a background image, it’s helpful to define a consistent size so that the size of the html container element can match the same height.We want each of the parallax sections to have a background image that a foreground can slide over.CSS MagicĪ few other things to note before we add the CSS. ( Pro Tip I included 4 generic background images…in case you want 4 sections…)Īlso note that within each section we have a div that holds the actual content of our sections - this will be important for allowing the visible content to be dynamic as our browser size changes. (Ie the second parallax section will have a class of parallax-2). Īdd as many as you’d like here, but be sure to change the number in the class associated with the div. I Will Have a Background Image Lorem Ipsum Dolor Lorem ipsum dolor sit amet, consectetur adipisicing elit. In the body of your html page, insert alternating sections with specific classes to define whether the section is meant to be a parallax background image, or a static container. So let’s create an index.html page to reflect this, with a few sections of content and few sections that will eventually have a background image. If you break down what sections are needed in the markup, you’ll see we have an alternating situation of a background image, then some content, etc. This can be done using only CSS, but it’s important to keep in mind that today a website is nothing if it isn’t responsive. Ultimately the only thing happening here is forcing the top content to behave as usual (ie scroll) while the background image(s) remains fixed. The first kind of parallax we’ll look at is a fixed-speed scroll effect. Simple Stars Round 1: Fixed Background Parallax (Also if you don’t have the Awwwards website on your radar it’s a great place for design inspiration.) My Favorite Examples The two most obvious that we will be focusing on today are using back ground images that are either fixed, or those that scroll at a slower speed than the foreground image, and different ways to implement these effects. There are many different ways to implement this affect. Ultimately the effect is created by targeting elements on the page to move in different directions, at different speeds, as the user scrolls. What do you notice about the speed of the foreground vs the background? There are countless libraries and plugins that help make this easier, but today we’re going to focus on hand rolling these effects to demonstrate what’s happening behind the scenes. It can also refer to animation effects that create movement as a user scrolls or interacts with a page in general. Parallax scrolling is a hip feature where background images of a website scroll at different speeds, creating the illusion of depth and movement. Build a dynamic parallax site without JavaScript.Add some JS to create a dynamic parallax site.Build a basic fixed parallax site with CSS.const mapRange = (inputLower, inputUpper, outputLower, outputUpper) => `) Pass in two ranges and you’ll get a function you can use to get the mapped value. They already provide a mapRange() function for this purpose. In this project, I was able to use GSAP and that meant using some of its utility functions. We can reference an element and work out the value from its center using a mapping function. For example, the left side of the viewport should be -1 for x, and 1 for the right side. We want to map these values around a center point. ![]()
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