block-in-inline-margin-collapses-through-multiple-floats-ref.html

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<!DOCTYPE html>

<title>CSS Reference</title>

<style>

.container { width: 200px; }

.first { width: 200px; height: 20px; margin-bottom: 40px; background: blue; }

.float-a { float: left; width: 50px; height: 30px; background: yellow; }

.float-b { float: right; width: 50px; height: 30px; background: orange; }

.second { width: 200px; height: 20px; background: blue; }

</style>

<p>Two blue rectangles 40px apart; yellow and orange floats sit between them.</p>

<div class="container">

    <div class="first"></div>

    <div class="float-a"></div>

    <div class="float-b"></div>

    <div class="second"></div>

</div>