Myriam  Rogahn

Myriam Rogahn

1598502660

CSS Position Sticky Tutorial With Examples[Complete Guide]

Seven to eight years back, CSS developers brought a fifth child into the positioning element world. The name of this element was “sticky” because all it does is get ‘stick’ to the viewport and just be in your sight (depending on the developer though). Although the sticky property of an element gives a name to a particular property in CSS, it does not bring anything ‘new” to the table. If I say, “let’s use a sticky div box,” you know what I am talking about, but before its release people would just define what they wanted to do like “Can I have a div box that would always be visible or available even if the people are scrolling?”

The entire point of bringing this up is to tell you that stickiness existed in web development long before it was introduced as a standard in CSS. This post will dive into the CSS position sticky, and we will find out how to get the CSS position fixed. Before we do that, let’s briefly see how people used the position sticky property before its official release.

Need For Position Sticky In CSS

As I mentioned, the position sticky in CSS was used even before it came out as a standard in CSS. So, why did they introduce it when everything was working fine?

Apart from CSS, the stickiness can be achieved through JavaScript also. In JavaScript, we make the use of scroll event handlers and calculate the offset of the page. With these values, we make calculations to stick the element as soon as the offset reaches a point. This used to work earlier, but for the last eight-nine years, scroll handlers became a total mess when better graphics were introduced in the systems.

The problem with scroll handlers is that unlike CSS, it relies on the CPU for doing its job. On the other hand, CSS uses hardware acceleration (a standard on all the browsers now for better cross browser compatibility), which means it relies on the GPU for doing its job. Due to this, we would often see the UI of the website, breaking down quickly when the sticky element is coded in JavaScript. A better solution to this is bringing the stickiness to the GPU. The only way to do that is by introducing it as a standard in CSS. Looking back, it actually makes a lot of sense. So, the “sticky” property was added to the positions which already had four values. To understand how to get “CSS position fixed,” we should know the behavior of other CSS values.

Read: Detailed Guide To CSS Supports In Browsers

CSS Position And Its Values

The position attribute in CSS is used to define the position of the element used in the browser window. With CSS position fixed, you can manipulate how the element behaves using different values of this property. Before the value “sticky” came into the picture, CSS: Position had four different values:

Static: The element with a static value remains with the natural flow of the document. Specifying positions through the top, left, right, etc., will not affect this element. This is also the default behavior of an element in HTML.

Relative:  The relative value is the same as the static value but now the left, right, top, bottom values will affect the position of the element. So, the position of the element will become relative to its default position and hence the word relative. Although, it is important to remember that moving this element will not affect other elements and they will still remain in their actual position and actual space. If z-index is not set properly, your two elements might overlap like this:

#web development #python #webdev

What is GEEK

Buddha Community

CSS Position Sticky Tutorial With Examples[Complete Guide]

Position Layout property in CSS

Hello, World! In this article, we will try to grasp the concepts of one of the trickiest and crucial topics in CSS.

Position layout property in CSS is solely used to place and position elements respectively in an HTML document. They assign respective positions to HTML elements so that the overall design of our page is maintained and managed well.

The widely used positions property in CSS are as follows:

1. Static position:

When an HTML element gets assigned with

staticposition, the various position properties likeleft,right,topandbottomdoesn’t work. Elements in an HTML document carry static position by default.

Let’s copy and paste the code below in an IDE to view what’s happening.

<!DOCTYPE html>
<html lang="en">
  <head>
    <style>
      #Section {
        height: 200vh;
        width: 800px;
        border: 5px solid blue;
        background-color: cyan;
        font-family: monospace;
        font-size: 2rem;
        text-align: center; 
      }

      #Div1, #Div2, #Div3 {
        border: 4px solid red;
        font-size: 1.5rem;
        width: 200px;
        height: 100px;
        text-align: center;
        display: inline-block;
      }

      #Div2 {
        position: static;
        left: 20px;
        top: 50px;
      }
    </style>
  </head>
  <body>
    <section id="Section">
      <p>This is Section</p>
      <div id="Div1">
        <p>This is Div 1</p>
      </div>
      <div id="Div2">
        <p>This is Div 2</p>
      </div>
      <div id="Div3">
        <p>This is Div 3</p>
      </div>
    <section>
  </body>
</html>

Upon adding position property

staticto the selector idDiv2, we saw that the position ofDiv2box didn’t change. Hence, we can conclude that elements with positionstaticdoesn’t get affected byleft, right,toporbottomproperties.

2. Relative position:

When an element gets assigned with position

relative, the position properties likeleft,right,top andbottomaffects the element’s position in the page relative to its normal position asstatic.

Let’s copy and paste the code below to

Div2selector to replace the previous position property.

#Div2 {
        position: relative;
        left: 20px;
        top: 50px;
      }

We can see that the

Div2box changed its position relative to its normal orstaticposition, i.e.20pxfrom theleftand50pxfrom thetop. Upon applyingrelativeposition property to an element, other contents in the same box won’t get affected and change positions

3. Fixed position:

This position property is used to freeze an element in a particular location of the page so that scrolling doesn’t affect the visibility or location of the element. When we apply

fixedvalue to a selector, it gets removed from the flow of the HTML document, i.e. the selector element gets uprooted from its actual position, becomes relative to the entire viewport, and doesn’t get scrolled.

Let’s copy and paste the code below to know the difference.

<!DOCTYPE html>
<html lang="en">
  <head>
    <style>
      #Section {
        height: 400vh;
        width: 800px;
        border: 5px solid blue;
        background-color: cyan;
        font-family: monospace;
        font-size: 2rem;
        text-align: center; 
      }
      #Div1, #Div2, #Div3 {
        border: 4px solid red;
        font-size: 1.5rem;
        width: 200px;
        height: 100px;
        text-align: center;
        display: inline-block;
      }
      #Div2 {
        position: fixed;
        left: 0;
        top: 0;
      }
    </style>
  </head>
  <body>
    <section id="Section">
      <p>This is Section</p>
      <div id="Div1">
        <p>This is Div 1</p>
      </div>
      <div id="Div2">
        <p>This is Div 2</p>
      </div>
      <div id="Div3">
        <p>This is Div 3</p>
      </div>
    <section>
  </body>
</html>

After scrolling, we can see that the id

Div2gets fixed in the topmost corner of the document.

4. Absolute position:

Just like

fixedposition, theabsoluteposition property removes selectors from the flow. As the element gets removed from its normal position, the parent element doesn’t regard it as its child anymore. The element becomes relative to the document.

#css #css3 #css-position-property #tutorials #learning-css #html-css

Raleigh  Hayes

Raleigh Hayes

1626922800

Theme Switcher with CSS Variables - Tutorial

Hello! For my last video of 2020, we are learning how to handle themes with CSS Variables, with a cool theme switcher from twitter. Enjoy!

Useful Links:
GitHub: https://github.com/redhwannacef/youtube/tree/master/theme-switcher

#css variables #css #tutorial #css variables - tutorial #css theme switcher

Aisu  Joesph

Aisu Joesph

1618024175

CSS Alignment Made Simple

CSS is seen as an impediment in web development for many of us. Most of the time it looks like even when you follow the rules and everything seems clear, it still doesn’t work the way you want it to.

Therefore, the purpose of this article is to make some features of CSS much easier to understand.

The thing I want to address now is the alignment of the elements.

Without further ado, here are some of the most common scenarios one might encounter when it comes to this topic and how they can be approached.

#css-center #css-position #css-flexbox #css-center-image-in-a-div #css

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