0
0
mirror of https://github.com/twbs/bootstrap.git synced 2024-12-04 16:24:22 +01:00
Bootstrap/docs/4.1/layout/utilities-for-layout.md

26 lines
2.0 KiB
Markdown
Raw Normal View History

---
layout: docs
title: Utilities for layout
2017-05-28 07:12:00 +02:00
description: For faster mobile-friendly and responsive development, Bootstrap includes dozens of utility classes for showing, hiding, aligning, and spacing content.
group: layout
2017-05-28 07:12:00 +02:00
toc: true
---
## Changing `display`
Use our [display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display/) for responsively toggling common values of the `display` property. Mix it with our grid system, content, or components to show or hide them across specific viewports.
2017-03-05 20:03:35 +01:00
## Flexbox options
Bootstrap 4 is built with flexbox, but not every element's `display` has been changed to `display: flex` as this would add many unnecessary overrides and unexpectedly change key browser behaviors. Most of [our components]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/alerts/) are built with flexbox enabled.
2017-03-05 20:03:35 +01:00
Should you need to add `display: flex` to an element, do so with `.d-flex` or one of the responsive variants (e.g., `.d-sm-flex`). You'll need this class or `display` value to allow the use of our extra [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flex/) for sizing, alignment, spacing, and more.
2017-03-05 20:03:35 +01:00
## Margin and padding
Use the `margin` and `padding` [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/) to control how elements and components are spaced and sized. Bootstrap 4 includes a five-level scale for spacing utilities, based on a `1rem` value default `$spacer` variable. Choose values for all viewports (e.g., `.mr-3` for `margin-right: 1rem`), or pick responsive variants to target specific viewports (e.g., `.mr-md-3` for `margin-right: 1rem` starting at the `md` breakpoint).
2017-03-05 20:03:35 +01:00
## Toggle `visibility`
2017-03-05 20:03:35 +01:00
When toggling `display` isn't needed, you can toggle the `visibility` of an element with our [visibility utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/visibility/). Invisible elements will still affect the layout of the page, but are visually hidden from visitors.