CSS button fixed

CSS button fixation

Buttons are a very common element in web design. We often need to add buttons to web pages to perform interactive operations, such as submitting forms and jumping to other pages. When designing buttons, we sometimes want them to stay fixed in place on the page, preventing them from moving as the page scrolls. This article will explain how to achieve this with CSS.

Using the position property to fix a button

In CSS, the position property is used to control the positioning of an element. By setting the position property to fixed, an element’s position is fixed relative to the browser window. Here’s a simple example code demonstrating how to use the position property to pin a button to the bottom right of the page:

.btn-fixed {
position: fixed;
bottom: 20px;
right: 20px;
padding: 10px 20px;
background-color: #007bff;
color: #fff;
border: none;
border-radius: 5px;
cursor: pointer;
}

<button class="btn-fixed">Fixed button</button>

In the above code, we define a button with the class name btn-fixed. By setting the position to fixed and the bottom and right properties to 20px, we can fix the button to the bottom right of the page. We also set the button’s background color, text color, border radius, and other styles.

Button Fixed During Scrolling

Sometimes we want a button to remain fixed in place even when the page is scrolled. This can be achieved by combining JavaScript. Here is a sample code that makes the button fixed at the top of the page when the page is scrolled:

.btn-fixed {
position: absolute;
top: 20px;
right: 20px;
padding: 10px 20px;
background-color: #007bff;
color: #fff;
border: none;
border-radius: 5px;
cursor: pointer;
}

window.onscroll = function() {myFunction()};

var header = document.getElementsByClassName("btn-fixed")[0];
var sticky = header.offsetTop;

function myFunction() {
if (window.pageYOffset > sticky) {
header.style.position = "fixed"; 
header.style.top = "0"; 
} else { 
header.style.position = "absolute"; 
header.style.top = "20px"; 
} 
} 

<button class="btn-fixed">Fixed button</button> 

In the above code, we first define a button style with the class name btn-fixed. By setting the position to absolute and the top and right properties to 20px, we position the button at the top right of the page. Then, using JavaScript to listen for page scroll events, when the page scrolls to the button’s position, we set the button’s fixed position to fixed, thus achieving the effect of the button remaining fixed during scrolling.

Conclusion

Through this article, we learned how to use CSS and JavaScript to achieve the fixed effect of a button. Whether it’s fixed at the bottom of the page or fixed in a certain position when the page scrolls, it can be achieved with simple CSS styles and JavaScript code.