In the project I was working on recently I had a chance to experiment with CSS3 and jQuery. You know CSS3, right? It’s that thing that makes all those beautiful and amazing things on the web and makes Flash want to run away and hide. Yeah, that CSS3. And I’m more than sure you have heard about jQuery. If you haven’t, well, it’s a kind of library where you cannot borrow any books, but it allows you to do other stuff and bring some additional magic to the web. Anyways, I ended up mixing those two which resulted in this cool effect. I found it really useful and hope you will too, as you can use in on almost every website that has some sort of menu – and let’s face it, most do.
The video below will show you what you’ll be making and how to do that. Unfortunately, since I had only 5 minutes for this, I focused only on the jQuery part. Everything else you need for this you will find in the tutorial below. You can also hit the “Live Demo” button to see the final effect yourself.
NOTE: To fully enjoy all of this extravaganza, you need to see it in a browser based on WebKit engine – Safari and Chrome being the best ones. Current version of Firefox doesn’t fully support it, not to mention Opera, or IE.
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
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Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
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Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
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</div><!-- content -->
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</body>
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</html>
Depending on your screen resolution, you will need a lot of text so…
IMPORTANT:Keep adding paragraphs with “lorem ipsum” until the menu disappears from your sight entirely when you scroll down to the very bottom of the page.
Importing jQuery and Nagging Menu Script
In your index.html file, just before the closing </body> tag, paste those two lines:
The .default and .fixed classes are very important to us. They will change the look and position of our menu; the former is responsible for how the menu looks at the beginning and for its position in the browser window, the latter is responsible for where the menu goes after we kick it out from its original position and how it looks then.
CSS3 Extravaganza
Now for the fun part :)! Let’s go from the top to the bottom through our CSS soupe and add some CSS3 sugar accordingly:
Simple as it is. We’re adding linear gradient, going from the top to the bottom vertically. Our gradient consists of three colors, color-stop simply tells the browser where that particular color should stop and the next one begin.
The transition-property determines which properties fall under the transition, in our case it will be color along with background. The transition-duration determines how long the transition should last, it will be 0.5s for color and 0.5s for background accordingly.
Your CSS3 styles for ul li a should look like this:
Great job, we’re done with CSS. Let’s add some jQuery!
jQuery Magic
All our code should be executed after the DOM is loaded. For that we’ll use this great method jQuery has, called .ready(). You’re probably familiar with the long notation:
Now, first thing we should do, is to grab our menu (which is a div with ID “menu”) and assign it to a variable, because we’ll use it several times. The same goes for its position, and for that we’ll use jQuery’s .offset() method which, unlike .position() method, returns the position of the element we use it on relatively to the document, not to the offset parent. Let’s do it:
Now we need to check if we scrolled down so far that our menu is not visible anymore. This point is exactly the position of our menu from the top + its height. We also need to check if the menu is now in its default position and has the default look:
If the result of our if statement is true – we want the menu to fade out, the we need to remove the .default class, give it a class of .fixed and then fade it back in, so we can see it:
Right now the effect works only in 50%; it fades out when you scroll down and then it reappears at the top of your browser window – but it doesn’t return to its original position and size when you scroll back up. Let’s fix it now.
For this we need another if statement. This one will be the exact opposite of the first one we made, so:
If the result of our statement is true, we want the menu to fade out again, remove the .fixed class and give it a class of .default this time, and then we want it to fade back in, so it’s visible to us:
Well done! Now, go and implement it somewhere and have fun :).
After Word
With a little customization you can easily tweak the whole thing to your liking and/or need, which makes this little effect very useful. Combine it with CSS3 and you’re done :). That’s it guys! If you have any questions, feel free to ask in the comments, I’ll do my best to answer them. Cheers!
In the project I was working on recently I had a chance to experiment with CSS3 and jQuery. You know CSS3, right? It’s that thing that makes all those beautiful and amazing things on the web and makes Flash want to run away and hide. Yeah, that CSS3. And I’m more than sure you have heard about jQuery. If you haven’t, well, it’s a kind of library where you cannot borrow any books, but it allows you to do other stuff and bring some additional magic to the web.
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