Chris DermodyI first wrote about this over on my blog - really only for my own personal reference since I'll need this code again in my next project. But thought I'd share here too.
If you're not using Tailwind for your CSS needs - I highly recommend it. It's now a staple of my product building toolkit, and it just fits so well with Vue.js and Nuxt workflows that I can't imagine moving to something else.
One thing about Tailwind is it leaves the Javascript to you. This is so it's library-agnostic.
For most of my projects I want that smooth shadow under the navbar - here's the code I use to achieve it.
The HTML
<nav
:class="{ 'scrolled': !view.atTopOfPage }"
class="fixed flex w-full bg-white border-b items-center justify-between flex-wrap p-5 m-auto top-0 animated">
</nav>
Here, we're adding the .scrolled class when the value in view.atTopOfPage is false.
The CSS
I have a navbar component that I use throughout the app, so this code would go there. PS: Yes this is technically SCSS...
nav {
z-index: 10
}
nav.scrolled {
@apply shadow-2xl;
border-bottom: 0px;
}
Apply the shadow to the navbar when it has the class scrolled.
The Javascript
// in data, I like to store a view object with all
// the values I need for a component to manage
// it's 'view' state - ie loading,
// or in this case, if the user is at the top of the page or not
data () {
return {
view: {
atTopOfPage: true
}
}
},
// a beforeMount call to add a listener to the window
beforeMount () {
window.addEventListener('scroll', this.handleScroll);
},
methods: {
// the function to call when the user scrolls, added as a method
handleScroll(){
// when the user scrolls, check the pageYOffset
if(window.pageYOffset>0){
// user is scrolled
if(this.view.atTopOfPage) this.view.atTopOfPage = false
}else{
// user is at top of page
if(!this.view.atTopOfPage) this.view.atTopOfPage = true
}
}
}
The Result
Buttery smooth shadows on your navbar. Check it out in action on my product Referextra.com
