Bootstrap 4 Tutorial

Bootstrap 4 Tutorial

Last modified on: October 25, 2024

<h1>Bootstrap 4 Tutorial</h1>
<h2>Introduction to Bootstrap 4</h2>
<p>Bootstrap 4 is a powerful front-end framework designed to streamline the process of developing responsive, mobile-first websites. It includes pre-designed components, a responsive grid system, and utility classes that make it easy to create attractive web pages quickly.</p>
<h2>Getting Started</h2>
<h3>Step 1: Setting Up Your Environment</h3>
<p>You can use Bootstrap 4 in two ways: by downloading it or using a CDN (Content Delivery Network).</p>
<h4>Using a CDN</h4>
<p>To quickly start using Bootstrap 4, add the following links to your HTML document:</p>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
    &lt;title&gt;Your Bootstrap 4 Project&lt;/title&gt;
    &lt;!-- Bootstrap CSS --&gt;
    &lt;link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"&gt;
    &lt;style&gt;
        body {
            padding-top: 56px; /* For fixed navbar spacing */
        }
    &lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;!-- Your content will go here --&gt;
    &lt;!-- Bootstrap JS and dependencies --&gt;
    &lt;script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.2/dist/umd/popper.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3>Step 2: Creating a Navigation Bar</h3>
<p>A navigation bar is an essential component for any web application. Here's how to create a simple responsive navbar:</p>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top"&gt;
    &lt;a class="navbar-brand" href="#"&gt;My Website&lt;/a&gt;
    &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"&gt;
        &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
    &lt;/button&gt;
    &lt;div class="collapse navbar-collapse" id="navbarNav"&gt;
        &lt;ul class="navbar-nav"&gt;
            &lt;li class="nav-item active"&gt;
                &lt;a class="nav-link" href="#"&gt;Home&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item"&gt;
                &lt;a class="nav-link" href="#"&gt;About&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item"&gt;
                &lt;a class="nav-link" href="#"&gt;Services&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item"&gt;
                &lt;a class="nav-link" href="#"&gt;Contact&lt;/a&gt;
            &lt;/li&gt;
        &lt;/ul&gt;
    &lt;/div&gt;
&lt;/nav&gt;
</code></pre>
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<h3>Step 3: Building the Main Content Area</h3>
<p>Bootstrap's grid system allows you to create responsive layouts easily. Here's an example of a two-column layout:</p>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;div class="container mt-5"&gt;
    &lt;h1&gt;Welcome to My Bootstrap 4 Site&lt;/h1&gt;
    &lt;div class="row"&gt;
        &lt;div class="col-md-6"&gt;
            &lt;h2&gt;About Us&lt;/h2&gt;
            &lt;p&gt;Learn about our mission and values.&lt;/p&gt;
        &lt;/div&gt;
        &lt;div class="col-md-6"&gt;
            &lt;h2&gt;Our Services&lt;/h2&gt;
            &lt;p&gt;Discover the services we offer to our clients.&lt;/p&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h3>Step 4: Adding Components</h3>
<p>Bootstrap 4 includes various components that you can use to enhance your web pages. Here are some examples:</p>
<h4>Buttons</h4>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;a href="#" class="btn btn-primary"&gt;Learn More&lt;/a&gt;
&lt;a href="#" class="btn btn-secondary"&gt;Contact Us&lt;/a&gt;
</code></pre>
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<h4>Cards</h4>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;div class="card" style="width: 18rem;"&gt;
    &lt;img src="https://via.placeholder.com/150" class="card-img-top" alt="Image description"&gt;
    &lt;div class="card-body"&gt;
        &lt;h5 class="card-title"&gt;Card Title&lt;/h5&gt;
        &lt;p class="card-text"&gt;Some quick example text to build on the card title and make up the bulk of the card's content.&lt;/p&gt;
        &lt;a href="#" class="btn btn-primary"&gt;Go somewhere&lt;/a&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h4>Modals</h4>
<div class="contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary dark:bg-gray-950">
<div class="flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between rounded-t-md h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary">html</div>
<div class="sticky top-9 md:top-[5.75rem]">
<div class="absolute bottom-0 right-2 flex h-9 items-center">
<div class="flex items-center rounded bg-token-sidebar-surface-primary px-2 font-sans text-xs text-token-text-secondary dark:bg-token-main-surface-secondary">
<pre class="language-markup"><code>&lt;!-- Button trigger modal --&gt;
&lt;button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal"&gt;
    Launch demo modal
&lt;/button&gt;

&lt;!-- Modal --&gt;
&lt;div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true"&gt;
    &lt;div class="modal-dialog" role="document"&gt;
        &lt;div class="modal-content"&gt;
            &lt;div class="modal-header"&gt;
                &lt;h5 class="modal-title" id="exampleModalLabel"&gt;Modal title&lt;/h5&gt;
                &lt;button type="button" class="close" data-dismiss="modal" aria-label="Close"&gt;
                    &lt;span aria-hidden="true"&gt;&amp;times;&lt;/span&gt;
                &lt;/button&gt;
            &lt;/div&gt;
            &lt;div class="modal-body"&gt;
                Modal body content goes here.
            &lt;/div&gt;
            &lt;div class="modal-footer"&gt;
                &lt;button type="button" class="btn btn-secondary" data-dismiss="modal"&gt;Close&lt;/button&gt;
                &lt;button type="button" class="btn btn-primary"&gt;Save changes&lt;/button&gt;
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h3>Step 5: Responsive Design</h3>
<p>Bootstrap 4's responsive design ensures your layout adjusts seamlessly across different devices. Use classes like <code>.col-</code>, <code>.col-sm-</code>, <code>.col-md-</code>, and <code>.col-lg-</code> to define how many columns a section should take up on various screen sizes.</p>
<h3>Step 6: Customizing Bootstrap</h3>
<p>You can customize Bootstrap by overriding its default styles in your CSS or by using SASS to compile your own version of Bootstrap with specific variables and settings.</p>
<h2>Conclusion</h2>
<p>Bootstrap 4 is a powerful tool for creating responsive web applications quickly and efficiently. With its robust features, pre-styled components, and flexible grid system, you can focus on building great user experiences without getting bogged down in design details.</p>
<p>Feel free to experiment with the components and layouts in your own projects to get the most out of Bootstrap 4!</p>

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