![]() although there is no need of using it because the default stack context will work. ![]() We are replacing background-attachment: fixed with position: fixed. So, we are creating two separate elements - one for the background-gradient and another for the rest of the content. If it’s looking at the smallest possible viewport, then maybe we should be working with an element that looks for the largest possible viewport and position that instead. So, as you know, we are getting in trouble with the background-attachment: fixed property and, as you might have guessed, we are removing it from our code. Whatever the case, it fixes the linear gradient and background image issues we just saw. iOS has an issue preventing background-attachment: fixed from being used with background-size: cover.Ĭall it a temporary hack, if you will.It causes the image to get cut off and gain whitespace around it. Chrome has an issue that occurs when using the will-change property on a selector which also has background-attachment: fixed defined.Firefox does not appear to support the local value when applied on a textarea element.The issues are nicely documented over at caniuse: This means 100vh will be larger than the visible height when the URL bar is shown. That is, vh units will be sized to the “largest possible viewport”. Instead, vh units will be sized to the viewport height as if the URL bar is always hidden. vh) will not resize in response to the URL bar being shown or hidden. Weird! Perhaps the reason is that background-attachment: fixed relies on the smallest possible viewport while elements rely on the largest possible viewport. That’s because background-attachment calculates a fixed background position relative to the viewport.Įven if we say the body is 100vh, background-attachment: fixed is not exactly in accordance with it. I want to keep the background gradient in a fixed position on scroll, so let’s apply basic CSS styling to the body that does exactly that: body The grey section at the top just indicates the presence of an actual URL bar in Chrome Android.Īnother interesting thing to note is that when background-attachment: fixed is applied, the height is ignored even if we explicitly specify it. We can see it by looking at two different approaches to CSS backgrounds: The issueīefore I show you the fix, let’s examine the issue. I suppose we could call it a “hack” since it’s a workaround in code that arguably we shouldn’t have to do at all. You can ditch this idea completely and let the background scroll on small screens using media queries. The body element will fill the entire screen by default, but we’ll have to style the other two divs with absolute positioning to do the same.What options do you have if you want the body background in a fixed position where it stays put on scroll? background-attachment: fixed in CSS, at best, does not work well in mobile browsers, and at worst is not even supported by the most widely used mobile browsers. The body (“background”), a div (“midground”), and another div (“foreground”). The effect is created with three page elements, all of which occupy the entire browser window. Distant stars will only move a little bit as you resize the browser window, while closer stars will move faster. Starry night is a full-page background effect with three layers. In honor of this amazing effect and it’s relevance to science, I created Starry Night. Not only because sci-fi movies use the effect all the time to create cool space effects, but because this effect is how we measure how far stars are away from our own solar system. Parallax has particular relevance to astronomy. ![]() Bushes right alongside the train tracks will zip past your view, while cattle grazing in the field will appear to move more slowly across your view and the mountains in the background will hardly move at all. You can think of motion parallax as what you see when you look out of a moving train. I thought I would take the idea an explain it in a bit more detail, which a slightly different application, and offer up a download for those interested. Paul wrote an article on Think Vitamin on how he created that parallax effect. The site itself was designed by Paul Annett. ![]() Make sure you resize your browser around when you visit the site to see the cool “ parallax” effect of the hanging vines. The Gorilla was designed by Jon Hicks (yep! the same site with the cool body-border technique). If you haven’t seen the mysteriously cool Silverback app teaser page you should check it out.
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