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<!DOCTYPE html PUBLIC "-//W3C//DTD//XHTML 1.0 Strict//EN" "">
<html xmlns="">
<title>CSS Test: An element with the 'display' property set to 'flex' establishes a new block-level flex container</title>
<link rel="author" title="Microsoft" href="" />
<link rel="help" href="" />
<link rel="match" href="reference/align-content-001-ref.html" />
<meta name="assert" content="This test checks that an element with 'display' property set to 'flex' establishes a new block-level flex container." />
<style type="text/css">
background-color: red;
display: flex;
height: 100px;
width: 300px;
div div
background-color: green;
width: 150px;
<p>Test passes if there is no red visible on the page.</p>
<div id="flexbox">