stub out flexbox layout docs
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- title: Viewports
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- title: Print
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- title: Test cases
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- title: Flexbox
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- title: Components
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pages:
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---
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layout: page
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title: Flexbox
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---
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Flexbox support has finally come to Bootstrap. Opt-in to the new CSS layout styles with the flick of a variable or the swap of a stylesheet.
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## What's included
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Flexbox support is available for a number of Bootstrap's components:
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- The entire grid system (mixins and predefined classes), which switch from `float`s to `display: flex;`.
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- Input groups, which move from `display: table;` to `display: flex;`.
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- The media component moves from `display: table;` and a number of hacky styles to a simple `display: flex;`.
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Vendor prefixes are provided in our compiled CSS with Autoprefixer via Grunt.
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## Why flexbox?
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In a nutshell, flexbix provides simpler and more flexible layout options in CSS. More specifically, it provides:
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- Easy vertical alignment of content within a parent element.
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- Easy reordering of content across devices and screen resolutions with the help of media queries.
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- Easy CSS-only equal height columns for your grid-based layouts.
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All these things are possible outside flexbox, but typically require extra hacks and workarounds to do right.
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## How it works
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If you're familiar with modifying variables in Sass—or any other CSS preprocessor—you'll be right at home to move into flexbox mode.
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1. Open the `_variables.scss` file and find the `$enable-flex` variable.
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2. Change it from `false` to `true`.
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3. Recompile, and done!
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Alternatively, if you don't need the source Sass files, you may swap the default Bootstrap compiled CSS with the compiled flexbox variation. [Head to the download page](/getting-started/download) for more information.
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## Browser support
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Enabling flexbox means **reduced browser and device support:**
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- Internet Explorer 9 and below do not support flexbox.
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- Internet Explorer 10 has a few known quirks.
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Please be extra conscious of your user base when enabling flexbox in your project.
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