form bootstrap 4 with code examples

Bootstrap 4 is the latest stable version of the Bootstrap framework. One of the key features of Bootstrap is the HTML and CSS form elements that are included in the framework, making it easy to create high-quality, responsive forms. In this article, we will learn how to create forms using Bootstrap 4, along with code examples.

What is Bootstrap 4?

Bootstrap is a popular open-source front-end framework developed by Twitter. It is a collection of CSS, JavaScript, and HTML codes that can be used to create responsive websites and applications. Bootstrap 4 is the latest version of the framework, released in 2018. It includes new features like updated classes, improved grid system, and support for Flexbox.

Why Use Bootstrap 4 Forms?

Bootstrap forms are a great way to make your website or application look great and professional without spending too much time and effort building them from scratch. Bootstrap forms are also responsive, meaning they automatically adjust to different screen sizes, making them user-friendly and accessible on any device. Bootstrap forms also support different input types, validation, and customization options.

Getting Started with Bootstrap 4 Forms

To work with Bootstrap 4 forms, you need to add the Bootstrap CSS and JavaScript files to your project. You can either download the files from the official Bootstrap website or use a CDN (Content Delivery Network) to link to the files online. Here is an example of how to link to the Bootstrap files:

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>My Bootstrap Form</title>
	<!-- Link to Bootstrap CSS file -->
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
	<!-- Link to jQuery (required for Bootstrap JS plugins) -->
	<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
	<!-- Link to Popper.js (required for Bootstrap JS plugins) -->
	<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.3/dist/umd/popper.min.js"></script>
	<!-- Link to Bootstrap JS file -->
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
</head>
<body>
</body>
</html>

Now that you have linked to the Bootstrap files, you can start building your form using the Bootstrap classes and components.

Basic Bootstrap 4 Forms

Bootstrap 4 provides several form control classes, such as input, textarea, select, and checkbox, that can be used to create basic forms. Here is an example of a basic Bootstrap 4 form:

<form>
	<div class="form-group">
		<label for="name">Name:</label>
		<input type="text" class="form-control" id="name">
	</div>
	<div class="form-group">
		<label for="email">Email:</label>
		<input type="email" class="form-control" id="email">
	</div>
	<div class="form-group">
		<label for="password">Password:</label>
		<input type="password" class="form-control" id="password">
	</div>
	<button type="submit" class="btn btn-primary">Submit</button>
</form>

In this example, we have a form element with three input fields for name, email, and password. Each input field has the class "form-control" to apply the Bootstrap styling and layout. We also have a submit button with the class "btn btn-primary" to apply the default Bootstrap button style.

Horizontal Bootstrap 4 Forms

Bootstrap 4 also provides a horizontal form layout option, which places labels and input fields on the same line. This layout is useful for shorter forms or when space is limited. Here is an example of a horizontal Bootstrap 4 form:

<form>
	<div class="form-group row">
		<label for="name" class="col-sm-2 col-form-label">Name:</label>
		<div class="col-sm-10">
			<input type="text" class="form-control" id="name">
		</div>
	</div>
	<div class="form-group row">
		<label for="email" class="col-sm-2 col-form-label">Email:</label>
		<div class="col-sm-10">
			<input type="email" class="form-control" id="email">
		</div>
	</div>
	<div class="form-group row">
		<label for="password" class="col-sm-2 col-form-label">Password:</label>
		<div class="col-sm-10">
			<input type="password" class="form-control" id="password">
		</div>
	</div>
	<div class="form-group row">
		<div class="offset-sm-2 col-sm-10">
			<button type="submit" class="btn btn-primary">Submit</button>
		</div>
	</div>
</form>

In this example, we have used the "form-group row" and "col-sm-*" classes to create a two-column layout for each input field. The "col-form-label" class is used to style the label elements. We also have an offset column for the submit button to align it with the input fields.

Customized Bootstrap 4 Forms

Bootstrap 4 also provides several customization options for forms, such as sizing, validation, and custom styles. Let's look at examples of how to customize Bootstrap 4 forms.

Sizing Bootstrap 4 Forms

Bootstrap 4 provides four input field sizes: "form-control-lg" for larger input fields, "form-control-sm" for smaller input fields, "col-form-label-lg" for larger labels, and "col-form-label-sm" for smaller labels. Here is an example of a large Bootstrap 4 form:

<form>
	<div class="form-group">
		<label for="name" class="col-form-label-lg">Large Name:</label>
		<input type="text" class="form-control form-control-lg" id="name">
	</div>
	<div class="form-group">
		<label for="email" class="col-form-label-lg">Large Email:</label>
		<input type="email" class="form-control form-control-lg" id="email">
	</div>
	<div class="form-group">
		<label for="password" class="col-form-label-lg">Large Password:</label>
		<input type="password" class="form-control form-control-lg" id="password">
	</div>
	<button type="submit" class="btn btn-primary btn-lg">Large Submit</button>
</form>

Validation Bootstrap 4 Forms

Bootstrap 4 also provides built-in validation classes for input fields that can be used to display validation errors to the user. Here is an example of a Bootstrap 4 form with validation:

<form>
	<div class="form-group">
		<label for="name">Name:</label>
		<input type="text" class="form-control is-valid" id="name" required>
		<div class="valid-feedback">
			Good job!
		</div>
		<div class="invalid-feedback">
			Please enter a valid name.
		</div>
	</div>
	<div class="form-group">
		<label for="email">Email:</label>
		<input type="email" class="form-control is-invalid" id="email" required>
		<div class="valid-feedback">
			Good job!
		</div>
		<div class="invalid-feedback">
			Please enter a valid email.
		</div>
	</div>
	<div class="form-group">
		<label for="password">Password:</label>
		<input type="password" class="form-control" id="password" minlength="6" maxlength="12" required>
		<div class="valid-feedback">
			Good job!
		</div>
		<div class="invalid-feedback">
			Please enter a password between 6 and 12 characters.
		</div>
	</div>
	<button type="submit" class="btn btn-primary">Submit</button>
</form>

In this example, we have added the "required" attribute to the input fields to make them required. We have also added the "is-valid" and "is-invalid" classes to the input fields based on whether they are valid or not. We have also added "valid-feedback" and "invalid-feedback" divs to display feedback to the user.

Custom Styling Bootstrap 4 Forms

Bootstrap 4 also provides several customization options for forms, such as custom colors, buttons, and more. Here is an example of a Bootstrap 4 form with custom styles:

<form>
	<div class="form-group">
		<label for="name">Name:</label>
		<input type="text" class="form-control" id="name">
	</div>
	<div class="form-group">
		<label for="email">Email:</label>
		<input type="email" class="form-control" id="email">
	</div>
	<div class="form-group">
		<label for="password">Password:</label>
		<input type="password" class="form-control" id="password">
	</div>
	<button type="submit" class="btn btn-custom">Custom Submit</button>
</form>
<style>
	.btn-custom {
		background-color: #4CAF50;
		border-color: #4CAF50;
	}
	.btn-custom:hover {
		background-color: #3e8e41;
		border-color: #3e8e41;
	}
</style>

In this example, we have added a custom style to the submit button using CSS. We have changed the background color and border color of the button. We have also added a hover effect to the button.

Conclusion

Bootstrap 4 provides several useful and customizable form elements that can be used to create high-quality, responsive forms for your website or application. In this article, we learned how to create basic forms, horizontal forms, customized forms, and more using Bootstrap 4. With Bootstrap 4, creating professional-looking forms has never been easier.

In this article, we have covered various topics related to Bootstrap 4 forms, including basic forms, horizontal forms, customized forms, sizing, validation, and custom styling. Let's dive in a bit deeper into some of these topics:

  1. Basic Forms:
    Bootstrap 4 provides several form control classes, such as input, textarea, select, and checkbox, that can be used to create basic forms. These classes offer a clean, minimalistic look and make it easy to create simple, straightforward forms. In addition, Bootstrap 4 provides customization options, such as adding placeholder text, changing the button text, and more.

  2. Horizontal Forms:
    Bootstrap 4 also provides a horizontal form layout option, which places labels and input fields on the same line. This layout is useful for shorter forms or when space is limited. By using the "form-group row" and "col-sm-*" classes, a two-column layout for each input field can be achieved.

  3. Customized Forms:
    Bootstrap 4 provides several customization options for forms, such as sizing, validation, and custom styles. These options enable developers to create personalized forms that align with their branding and add unique touches to their web applications.

  4. Sizing:
    Bootstrap 4 provides four input field sizes: "form-control-lg" for larger input fields, "form-control-sm" for smaller input fields, "col-form-label-lg" for larger labels, and "col-form-label-sm" for smaller labels. These sizes can be used to create visually appealing forms that are easy to read and interact with.

  5. Validation:
    Bootstrap 4 provides built-in validation classes for input fields that can be used to display validation errors to the user. With the "is-valid" and "is-invalid" classes, users can quickly see whether an input field is correct or incorrect. The developer can also customize the validation messages to fit the specific requirements of the web application.

  6. Custom Styling:
    Bootstrap 4 allows developers to add custom styles to their forms, providing them with the ability to personalize their web applications. This actionable feature enables developers to create forms that match their corporate branding, website themes, and user requirements. This can be achieved using CSS, allowing developers to customize colors, buttons, text sizes, and more.

In conclusion, Bootstrap 4 offers substantial benefits, including providing a simple and supportive platform to create professional-looking forms quickly. With its customizable design and range of features, Bootstrap 4 forms provide a faster, easier, and more efficient way to design forms for any website or web application. These forms take into consideration user interaction and engagement, providing customers with the opportunity to successfully execute any desired actions without confusion or difficulty.

Popular questions

  1. What is Bootstrap 4?
    Answer: Bootstrap 4 is the latest stable version of the Bootstrap framework. It is a collection of CSS, JavaScript, and HTML codes that can be used to create responsive websites and applications.

  2. How can bootstrap files be added to a project?
    Answer: Bootstrap files can be added to a project either by downloading them from the official Bootstrap website or using a CDN (Content Delivery Network) to link to the files online.

  3. What are some customization options available for Bootstrap 4 forms?
    Answer: Bootstrap 4 forms provide several customization options such as sizing, validation, and custom styles.

  4. How can validation errors be displayed in Bootstrap 4 forms?
    Answer: Bootstrap 4 provides built-in validation classes for input fields that can be used to display validation errors to the user. For example, "is-valid" and "is-invalid" classes can be used to indicate valid or invalid input values.

  5. What is the purpose of the "form-group row" and "col-sm-" classes in Bootstrap 4 horizontal forms?
    Answer: The "form-group row" and "col-sm-
    " classes are used to create a two-column layout for each input field in Bootstrap 4 horizontal forms. The "col-form-label" class is used to style the label elements, and an offset column can be used to align the submit button with the input fields.

Tag

Forms-Bootstrap4

Have an amazing zeal to explore, try and learn everything that comes in way. Plan to do something big one day! TECHNICAL skills Languages - Core Java, spring, spring boot, jsf, javascript, jquery Platforms - Windows XP/7/8 , Netbeams , Xilinx's simulator Other - Basic’s of PCB wizard
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