A spinner loader, also known as a "loading spinner" or "load indicator", is a graphical element that is commonly used to indicate that a background process, such as loading data from a server, is currently in progress. Bootstrap is a popular open-source framework for building responsive, mobile-first web pages. In this article, we will discuss how to create a spinner loader using Bootstrap and provide code examples to help you implement it on your website.
Bootstrap provides several built-in classes that can be used to create a spinner loader. The most commonly used class is the "spinner-border" class, which creates a rotating border around a fixed-size square. For example, the following code creates a spinner loader with a default size of 1rem (16px) and a border width of 2px:
<div class="spinner-border"></div>
You can also use the "spinner-grow" class to create a growing spinner loader. This class creates a rotating spinner that increases in size as it rotates. For example, the following code creates a spinner loader with a default size of 1rem (16px) and a border width of 2px:
<div class="spinner-grow"></div>
You can also customize the color of the spinner loader by adding a "text-*" class to the "spinner-border" or "spinner-grow" class. For example, the following code creates a blue spinner loader:
<div class="spinner-border text-primary"></div>
In addition, Bootstrap also provides several options to change the size and animation speed of the spinner loader. The "spinner-border" and "spinner-grow" classes both have a "sm", "lg" and "xl" option, which can be used to change the size of the spinner loader. For example, the following code creates a large spinner loader:
<div class="spinner-border spinner-border-lg"></div>
If you want to change the animation speed of the spinner loader, you can use the "animation-*" class. For example, the following code creates a spinner loader with a 2s animation speed:
<div class="spinner-border animation-2s"></div>
Finally, you can use JavaScript to hide or show the spinner loader based on the status of the background process. For example, the following code creates a button that starts a background process when clicked and shows the spinner loader while the process is running:
<button onclick="startProcess()">Start Process</button>
<div id="spinner" class="spinner-border" style="display: none;"></div>
<script>
function startProcess() {
document.getElementById("spinner").style.display = "block";
// Start background process here
// ...
document.getElementById("spinner").style.display = "none";
}
</script>
In conclusion, Bootstrap provides several built-in classes and options that can be used to create a spinner loader. With a few lines of code, you can add a spinner loader to your website to indicate that a background process is in progress. With the use of JavaScript, you can also hide or show
In addition to creating a basic spinner loader, Bootstrap also provides a few additional features that can enhance the functionality of your loading indicator.
One such feature is the ability to create a spinner loader within a button. This can be useful when you want to indicate that a button is in a loading state and the user should wait before clicking it again. To create a spinner loader within a button, you can use the "spinner-border" or "spinner-grow" classes along with the "spinner-border-sm" or "spinner-grow-sm" classes to create a smaller spinner. The following example shows how to create a spinner loader within a button:
<button class="btn btn-primary" type="button" disabled>
<span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
Loading...
</button>
Another useful feature provided by Bootstrap is the ability to create a spinner loader within a list item. This can be useful when you want to indicate that an item in a list is in a loading state. To create a spinner loader within a list item, you can use the "spinner-border" or "spinner-grow" classes along with the "align-self-center" class to center the spinner within the list item. The following example shows how to create a spinner loader within a list item:
<li class="list-group-item">
<div class="d-flex w-100 justify-content-between align-self-center">
<div class="spinner-border"></div>
<strong>Loading...</strong>
</div>
</li>
In addition, you can use CSS to create more complex and custom loading indicators. By using keyframe animations, you can create a variety of animations to represent the loading process.
It is important to note that while providing visual indication of a loading process is important, providing feedback to users who might use assistive technology, such as screen readers, is also crucial. To make your loading indicator accessible, you can use ARIA attributes such as "aria-busy" and "aria-live" to indicate the loading state of a particular element.
In conclusion, Bootstrap provides several built-in classes and options that can be used to create a variety of spinner loaders. With a few lines of code, you can add a loading indicator to your website to indicate that a background process is in progress, making it more user-friendly. With the use of CSS, JavaScript and ARIA attributes, you can also create more complex and custom loading indicators, and make them accessible for users with assistive technology.
Popular questions
- What is a spinner loader and what is its purpose?
- A spinner loader, also known as a "loading spinner" or "load indicator", is a graphical element that is commonly used to indicate that a background process, such as loading data from a server, is currently in progress. Its purpose is to let the user know that the website is currently working on a task in the background and to wait for the process to complete.
- What is Bootstrap and how is it related to spinner loaders?
- Bootstrap is a popular open-source framework for building responsive, mobile-first web pages. It provides several built-in classes that can be used to create a spinner loader, including the "spinner-border" and "spinner-grow" classes. These classes can be easily customized to change the color, size, and animation speed of the spinner loader.
- How can I customize the color of a spinner loader using Bootstrap?
- To customize the color of a spinner loader using Bootstrap, you can add a "text-*" class to the "spinner-border" or "spinner-grow" class. For example, the following code creates a blue spinner loader:
<div class="spinner-border text-primary"></div>
- How can I change the size and animation speed of a spinner loader using Bootstrap?
- To change the size of a spinner loader using Bootstrap, you can use the "sm", "lg" and "xl" options with the "spinner-border" and "spinner-grow" classes. For example, the following code creates a large spinner loader:
<div class="spinner-border spinner-border-lg"></div>
To change the animation speed of a spinner loader using Bootstrap, you can use the "animation-*" class. For example, the following code creates a spinner loader with a 2s animation speed:
<div class="spinner-border animation-2s"></div>
- How can I show or hide a spinner loader using JavaScript?
- To show or hide a spinner loader using JavaScript, you can use the "getElementById()" method to select the element and then use the "style.display" property to change the value to "block" or "none". For example, the following code creates a button that starts a background process when clicked and shows the spinner loader while the process is running:
<button onclick="startProcess()">Start Process</button>
<div id="spinner" class="spinner-border" style="display: none;"></div>
<script>
function startProcess() {
document.getElementById("spinner").style.display = "block";
// Start background process here
// ...
document.getElementById("spinner").style.display = "none";
}
</script>
Tag
Spinner
