Bootstrap Grid System

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Questions and Answers

You need to create a layout where, on small screens, content takes up the full width, but on medium screens and larger, it's centered with a maximum width. Which combination of Bootstrap classes should you use?

  • `.container` for small screens and `.container-fluid` for larger screens
  • `.container-fluid` only
  • `.container` only
  • `.container-fluid` for small screens and `.container` for larger screens (correct)

You want to display three columns in a row on large screens, but have them stack vertically on small screens. Which combination of column classes would achieve this?

  • `.col-lg-4`
  • `.col-sm-12 col-lg-4` (correct)
  • `.col-sm-4`
  • `.col-4`

You have a row with three columns. You want the second column to be visually placed last, but maintain its original position in the HTML structure for SEO purposes. Which class should you apply to the second column?

  • `.col-auto`
  • `.align-self-end`
  • `.offset-3`
  • `.order-last` (correct)

Assume you have a row with two columns. You want the columns to have equal spacing between them and the edges of their row using the gutter classes. Which approach is most efficient?

<p>Using the <code>.g-*</code> classes on the row to define horizontal and vertical gutters. (B)</p> Signup and view all the answers

To ensure your layout adapts well to a range of devices, which sequence of breakpoints should you consider when defining column widths?

<p>Starting with <code>.col-*</code> for default behavior, then progressively enhancing with <code>.col-sm-*</code>, <code>.col-md-*</code>, and <code>.col-lg-*</code>. (B)</p> Signup and view all the answers

You have a form with labels and input fields arranged in columns within a Bootstrap grid. What is general best approach to vertically align the labels with the input fields, especially when the labels have varying text lengths?

<p>Use <code>.align-items-center</code> on the row. (D)</p> Signup and view all the answers

You want to create a grid layout using Bootstrap's .d-grid class. How can you control the number of columns in the grid?

<p>By using the <code>grid-template-columns</code> CSS property directly on the grid container. (C)</p> Signup and view all the answers

How can you control the wrapping behavior of columns within a Bootstrap row, preventing them from wrapping to the next line even if the total column count exceeds 12?

<p>By using flexbox utilities like <code>.flex-nowrap</code> on the row. (B)</p> Signup and view all the answers

If you have a column defined with .col-md-6 and you want it to take up the full width on extra-small screens, what additional class(es) do you need?

<p><code>.col-12</code> (D)</p> Signup and view all the answers

You are using .col-auto for a column, but the content within that column is minimal, resulting in a very narrow column. How do you ensure a minimum width for the column while still allowing it to grow based on its content?

<p>Apply a <code>min-width</code> CSS property to the column directly. (B)</p> Signup and view all the answers

Flashcards

Bootstrap Grid System

Bootstrap divides the viewport into 12 columns, allowing for flexible and responsive layouts.

.container class

Centers content and sets a maximum width for the container.

.container-fluid class

Creates a full-width container that spans the entire viewport width.

.row class

Class that creates horizontal groups of columns in Bootstrap.

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.col-* classes

Classes that define the widths of columns within a row.

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xs breakpoint

Breakpoints in Bootstrap that create responsive designs for extra-small screens (phones).

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sm breakpoint

Breakpoints in Bootstrap that create responsive designs for small screens (tablets).

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md breakpoint

Breakpoints in Bootstrap that create responsive designs for medium screens (desktops).

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Responsive Design

Layout adjusts automatically based on the screen size.

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Column wrapping

The extra columns wrap to the next line.

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Study Notes

Bootstrap Grid System Overview

  • Bootstrap's grid system provides a flexible layout structure using 12 columns.
  • Layouts adapt to different screen sizes using responsive design principles.

Key Classes

  • .container centers content and sets a maximum width.
  • .container-fluid creates a full-width container.
  • .row creates horizontal groups of columns.
  • .col-* defines column widths across different screen sizes.
  • .g-* adds spacing (gutters) between columns.
  • .offset-* shifts columns to the right.
  • .order-* changes the visual order of columns.
  • .align-items-* aligns columns vertically.
  • .col-auto sizes columns based on content.
  • .row-cols-* defines the number of columns within each row.
  • .d-grid creates a CSS grid layout.

Breakpoints

  • xs applies to extra-small screens (phones).
  • sm applies to small screens (tablets).
  • md applies to medium screens (desktops).
  • lg applies to large screens (larger desktops).
  • xl applies to extra-large screens (very large desktops).

Important Behaviors

  • If a row exceeds 12 columns, the extra columns wrap to the next line.
  • The * in classes like col-md-* represents the number of columns to span.
  • .col makes all columns within a row have equal width.

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