Bootstrap for Responsive Web Design

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Questions and Answers

What is the primary purpose of Bootstrap?

  • To develop server-side applications using PHP
  • To design mobile applications for iOS only
  • To create responsive web applications with HTML, CSS, and JavaScript (correct)
  • To manage databases using SQL

Which of the following is a key advantage of using Bootstrap for web development?

  • It creates applications exclusively for desktop environments
  • It offers faster and easier web development with responsive design (correct)
  • It ensures complete backward compatibility with all older browsers
  • It is specifically designed for creating video games

What role does the HTML5 doctype play in Bootstrap?

  • It is optional and does not affect the styling or functionality
  • It is only required for mobile devices, not for desktop browsers
  • It is used to specify the character set for multilingual support
  • It indicates the version of HTML used in the document and ensures proper rendering (correct)

Which meta tag is crucial for ensuring proper rendering and touch zooming on different devices in Bootstrap?

<p><meta name="viewport" content="width=device-width, initial-scale=1.0"> (C)</p> Signup and view all the answers

How does Bootstrap's approach to box-sizing improve CSS sizing?

<p>It switches to <code>border-box</code> ensuring padding doesn't affect the final computed width (B)</p> Signup and view all the answers

What is the purpose of 'Reboot' in Bootstrap?

<p>It's a reset CSS that builds upon Normalize, providing opinionated styles using element selectors (C)</p> Signup and view all the answers

What is the significance of breakpoints in Bootstrap's layout system?

<p>They determine how the responsive layout adjusts to different device or viewport sizes. (A)</p> Signup and view all the answers

In Bootstrap, what is the primary function of containers?

<p>To contain, pad, and align content within a given device or viewport (D)</p> Signup and view all the answers

Given that Bootstrap's grid system is based on rows and columns, what does it rely on to structure content?

<p>Containers to hold rows and columns. (C)</p> Signup and view all the answers

What is the purpose of 'gutters' in Bootstrap's grid system?

<p>They provide padding between columns to control the space between them. (C)</p> Signup and view all the answers

How many template columns are available per row in Bootstrap's grid system?

<p>12 (A)</p> Signup and view all the answers

What does it mean that Bootstrap's grid system supports six responsive breakpoints?

<p>It allows control over container and column sizing based on the viewport. (D)</p> Signup and view all the answers

In Bootstrap, which class is used to horizontally center the content within a container and add padding?

<p>.container (A)</p> Signup and view all the answers

Which class in Bootstrap applies a blue color to text?

<p>.text-primary (D)</p> Signup and view all the answers

Which Bootstrap class is used to apply a green background color to an element?

<p>.bg-success (A)</p> Signup and view all the answers

Which class is used to remove text decoration from a link in Bootstrap?

<p>.text-decoration-none (A)</p> Signup and view all the answers

Which Bootstrap class is used to set the font weight of an element to bold?

<p>.fw-bold (B)</p> Signup and view all the answers

To add a border to all sides of an element using Bootstrap, which class should you use?

<p>.border (B)</p> Signup and view all the answers

Which Bootstrap class helps in creating rounded corners for an element?

<p>.rounded (B)</p> Signup and view all the answers

What does the Bootstrap class m-auto typically do?

<p>Sets the margin to auto on all sides of an element (A)</p> Signup and view all the answers

What is the effect of using the .float-start class in Bootstrap?

<p>It floats the element to the left. (A)</p> Signup and view all the answers

Which Bootstrap class is used to add a shadow to an element?

<p>.shadow (B)</p> Signup and view all the answers

How can you set the width of an element to 50% of its parent, using Bootstrap utility classes?

<p>.w-50 (C)</p> Signup and view all the answers

Which Bootstrap class is used to vertically align an element to the middle of its parent?

<p>.align-middle (B)</p> Signup and view all the answers

Which of the following classes will position an element at the top of the viewport, remaining fixed even when the page is scrolled?

<p>.fixed-top (A)</p> Signup and view all the answers

To hide an element using Bootstrap, while ensuring it takes up no space on the layout, which class should be applied, assuming you are at the extra small breakpoint?

<p>.d-none (C)</p> Signup and view all the answers

In Bootstrap, which class is used to create a block-level flex container?

<p>.d-flex (A)</p> Signup and view all the answers

Which setting would prevent user interaction, like hover effects or clicks, on an element, using Bootstrap?

<p>.pe-none (B)</p> Signup and view all the answers

How can the opacity of an element be set to 50% using Bootstrap classes?

<p>.opacity-50 (A)</p> Signup and view all the answers

Which class in Bootstrap will automatically add a vertical scrollbar to an element if its content overflows?

<p>.overflow-auto (B)</p> Signup and view all the answers

What is the main purpose of the .invisible class in Bootstrap?

<p>To hide an element, but keeping its space in the layout (C)</p> Signup and view all the answers

Which of the following is NOT a component provided by Bootstrap 5?

<p>Calculator (C)</p> Signup and view all the answers

In Bootstrap forms, what is the purpose of wrapping labels and form controls in a div with the class form-group?

<p>To provide optimum spacing between labels and controls. (A)</p> Signup and view all the answers

In Bootstrap's forms, which class is applied to a standard text input field for default styling?

<p>form-control (A)</p> Signup and view all the answers

Which class in Bootstrap is applied to style a checkbox or radio button?

<p>form-check-input (C)</p> Signup and view all the answers

Which Bootstrap class would you use to style a range input (slider)?

<p>form-range (D)</p> Signup and view all the answers

Flashcards

Bootstrap

A free and open-source collection of tools for building responsive web applications.

Bootstrap's Popularity

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first websites.

Mobile-First Development

A strategy where code is optimized for mobile devices first, then scaled up for larger screens.

Reboot in Bootstrap

A CSS reset included in Bootstrap 4, providing consistent styling for HTML elements using element selectors.

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Breakpoints

Widths that determine how a responsive layout behaves across different device or viewport sizes in Bootstrap.

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Containers in Bootstrap

Fundamental building blocks of Bootstrap that contain, pad, and align content within a given device or viewport.

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Bootstrap Grid System

The Bootstrap Grid System is used for layout, specifically Responsive Layouts.

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Gutters

Padding between columns, used to responsively space and align content in the Bootstrap grid system.

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.text-primary

Applying blue color (#007bff) on text.

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.fw-bold

Setting font-weight of an element to bold.

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.border

Add a border on all sides of an element.

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.shadow

Add a shadow to an element.

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.w-25

Set the width

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.align-middle

Aligns the element in the middle of the parent element.

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.position-relative

Position an element relative.

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.d-{breakpoint}-none

Hide an element completely.

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.d-{breakpoint}-inline

Force an element to generate an inline-level box.

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Flex display

Applies display utilities to create a flexbox container and transform direct children elements to flex items.

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.user-select-all

Entire text selected when clicked by the user.

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.opacity-50

Sets the opacity to 0.5.

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.overflow-auto

Automatically gives vertical scrollbar for content overflow.

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.invisible

Hides element. Takes up space.

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Study Notes

  • Bootstrap is a tool collection that is free and open-source
  • Intended for creating responsive web applications
  • Is the most popular HTML, CSS, and JavaScript framework
  • Facilitates developing responsive, mobile-first websites
  • Solves cross-browser compatibility issues
  • Websites are compatible with all browsers and screen sizes
  • Created By Mark Otto and Jacob Thornton of Twitter and later declared open-source

Why Use Bootstrap

  • It enables faster and easier web development
  • Creates platform-independent web pages
  • Creates responsive web pages
  • Is designed to be responsive to mobile devices
  • Is available for free at www.getbootstrap.com

Downloading Bootstrap

  • Get it at http://getbootstrap.com
  • Can get Compiled CSS & JS, Source Code
  • Allows including with package managers like npm, RubyGems
  • Can also load it directly through a Content Delivery Network (CDN).

Important information about HTML

  • After downloading, load the CSS and JS files in the downloaded folder into the web page
  • To load downloaded Bootstrap, extract the ZIP
  • Copy the CSS and JS folders and paste them in the project folder
  • Load by using link and script tags, ideally CSS should be loaded in the head section, and JS just before the end body tag.
  • To load CDN Bootstrap:
  • It isn't necessary to download anything, just load Bootstrap from a Content Delivery Network

Breakpoints

  • Breakpoints determine how a responsive layout behaves across devices or viewport sizes
  • Breakpoints are key for responsive design
  • Breakpoints control when a layout adapts at a particular viewport or device size.
  • Below are the Available Breakpoints for Bootstrap.
  • Extra small has no class infix and is less than 576px.

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