EnglishEspañol한국어Tiếng ViệtIn this tutorial, we’ll learn how to create a pattern seen on many websites these days: a fixed header which animates to a less obtrusive state as we scroll down the page, We’ll start with the basic structure, then get things working using CSS and pure JavaScript" /> EnglishEspañol한국어Tiếng ViệtIn this tutorial, we’ll learn how to create a pattern seen on many websites these days: a fixed header which animates to a less obtrusive state as we scroll down the page, We’ll start with the basic structure, then get things working using CSS and pure JavaScript" />

Cố Định Menu Khi Cuộn Trang Trong Wordpress

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Difficulty:BeginnerLength:MediumLanguages:url-selector#selectionChanged" data-controller="url-selector">EnglishEspañol한국어Tiếng Việt

In this tutorial, we’ll learn how to create a pattern seen on many websites these days: a fixed header which animates khổng lồ a less obtrusive sầu state as we scroll down the page. We’ll start with the basic structure, then get things working using CSS và pure JavaScript. Before closing, we’ll briefly cover how we can optimize our code as well as discussing challenges present when applying this kind of pattern khổng lồ touch devices.Quý Khách vẫn xem: Cố định header lúc cuộn trang

To get an idea of what we’re going lớn build, here’s the demo (you may prefer fullscreen view):

HTML Markup

We’ll start this exercise with the following markup–a header, containing a and a couple of other nested elements:

Logo ☰ The nav element, which is part of the header, contains three elements; the hình ảnh sản phẩm, the main menu, and a placeholder button to trigger a responsive menu (below 1061px). 

Note: If you cliông chồng on this button, nothing much will happen. Creating the responsive sầu thực đơn is beyond the scope of this tutorial.

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Initial CSS Styles

Now let’s have sầu a look at some CSS styles to lớn get things moving:

header position: fixed; top: 0; width: 100%; padding: 20px; box-sizing: border-box; background: #DD3543;nav display: flex; align-items: flex-end; justify-content: space-between; transition: align-items .2s;.biểu tượng logo font-size: 2rem; display: inline-block; padding: 20px 30px; background: #F35B66; color: #fff; margin: 50px 0 0 50px; transition: all .2s;ul display: flex; margin: 50px 50px 0 0; padding: 0; transition: margin .2s;li:not(:last-child) margin-right: 20px;li a display: block; padding: 10px 20px;.toggle-menu display: none; font-size: 2rem; color: #fff; margin: 10px 10px 0 0; transition: margin .2s;main display: block; padding: 0 20px;Here’s a brief explanation of the most important rules here:

The header element is a fixed positioned element.We use flexbox to layout the nav element.The logo has margin-top: 50px and margin-left: 50px. Additionally, we give sầu it padding: 20px 30px.The main menu mirrors the logo sản phẩm, with margin-top: 50px and margin-right: 50px.The responsive link button is hidden. It becomes visible when the viewport width is less than 1061px. Moreover, we set its top & right margins to 10px.We add the transition property to lớn the elements whose property values will change in the future. In this way, we achieve a smooth transition effect between the initial state & the final state. 

With these rules in place, the header looks like this:


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Animating the Header

So far we’ve built the basic structure of our header. It’s now time khổng lồ discuss the next steps:

The main element should be positioned right underneath the header. Rethành viên that the header has positioned: fixed, and it’s therefore positioned on top of the main element. The header should be animated as we scroll down the page.

To solve the first task, we add a padding-top property to lớn the main element. The value of this property should be equal lớn the header’s height. In our case, we haven’t specified a fixed height for our header, so we’ll use some JavaScript to calculate it, & then add the corresponding padding to the main element. 

To solve the second task, we’ll vị the following:

Retrieve sầu the number of pixels that the document has already been scrolled vertically.If this number is greater than 150px, we assign the scroll class to lớn the header.

JavaScript

Here’s the required JavaScript code–we begin by defining some variables, calculating the height of the header, then adding that value as padding-top khổng lồ the main element:

Now onkhổng lồ the scrolling event:

function onScroll() window.addEventListener("scroll", callbackFunc); function callbackFunc() var y = window.pageYOffset; if (y > 150) h.classList.add("scroll"); else h.classList.remove("scroll"); Here we take advantage of the window’s pageYOffset property khổng lồ calculate the number of pixels that our document has been scrolled vertically. lưu ý that this property doesn’t work in older versions of IE (here.

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Then we use the classList property khổng lồ add & remove the scroll class from our header. Not all browsers support this property however, so if you want to tư vấn any of these you may want lớn look at the classList.js & classie.js polyfills. For this example, we could have sầu used the className property lớn manipulate our single class, but in a real-world scenario this might not the igiảm giá khuyến mãi solution (in case we have multiple classes). 

To wrap things up, we Gọi our functions in two different cases:

When the page loadsand as we rekích thước the browser window.

window.onload = function() setTopPadding(); onScroll();;window.onresize = function() setTopPadding();;

CSS

As long as our scrolling exceeds the limit of 150px, a few additional CSS rules take place:

.scroll box-shadow: 0 7px 0 0 rgba(0, 0, 0, .1);.scroll .logo sản phẩm padding: 10px 20px; font-size: 1.5rem;.scroll nav align-items: center;.scroll .biểu tượng logo,.scroll ul,.scroll .toggle-menu margin: 0;Specifically, we make the following changes:

The aforementioned rules result in this new header layout:


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Going Responsive

As we’ve sầu mentioned in a previous section, when the viewport width is less than 1061px, we hide the thực đơn và show the responsive link button (which doesn’t actually do anything). Plus, we make a few other changes in the target elements.