Usually, the background image scrolls together with the content of the block. This can be clearly seen in the mini-browser. Scroll down in the window and watch how the background moves upwards.
With the background-attachment property, the background can be locked in place and will not move when you scroll.
The property value is:
- scroll – The background scrolls along with the content. This is the default value.
- fixed – The background does not scroll. It is fixed in one place.
This is a case where it is easier to show than to offer an explanation: complete the assignment and watch how the background behavior changes as you scroll.
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The background-color Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-image">2. The background-image Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-repeat">3. The background-repeat Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-position">4. The background-position Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-position-2">5. A Little More on background-position</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/advanced-styling/backgrounds/background-attachment">6. The background-attachment Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/background-property">7. The background Property</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/summary-1">8. Summary of “Backgrounds: An Introduction. Part 1”</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/challenge-1">9. Challenge: Cat Comics</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/jpeg-format">10. JPEG format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/png-8-format">11. The PNG-8 Format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/png-24-format">12. PNG-24 format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/gif-format">13. The GIF Format</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/multiple-backgrounds">14. Multiple backgrounds</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/repeating-backgrounds">15. Effects with a Repeating Background</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/sprites">16. Sprites</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/summary-2">17. Summary of “Backgrounds: An Introduction. Part 2”</a></li><li class="main-nav__course-contents-item"><a href="/courses/advanced-styling/backgrounds/challenge-2">18. 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2.334.725-.13.837-1.46.93-2.13h.112c.937.492 1.647 1.33 1.98 2.334-.388.176-.793.31-1.21.4zm18.365-2.864c-1.104-.145-2.215-.232-3.33-.26-.546-.01-1.093.05-1.626.176-1.166.483-2.08 1.425-2.53 2.604l-.158.79 1.795.623c.558.153 1.132.24 1.71.26h.28c3.245-.177 4.137-3.72 4.137-3.72l.084-.353zm-1.264 1.86c-.54 1.394-2.882 1.646-2.966 1.646-.517-.02-1.03-.11-1.525-.26-.186-.085-.633-.26-1.08-.43.374-.966 1.117-1.746 2.065-2.165 0 .68.158 1.953.81 2.083.65.13.613-1.535.566-2.26.934.005 1.865.064 2.79.177-.11.316-.473.65-.66 1.17z" fill="#151841"/><path d="M19.26 39.27c.535 1.362 1.56 2.473 2.874 3.115.534.312 1.204-.07 1.207-.69.002-.285-.15-.55-.397-.695-.918-.46-1.65-1.222-2.073-2.158-.344-.957-1.972-.52-1.61.428zm29.45 3.125c1.083-.59 2.01-1.428 2.706-2.446.3-.556-.112-1.228-.743-1.21-.293.007-.56.17-.698.428-.568.776-1.306 1.412-2.158 1.86-.394.23-.517.742-.27 1.125.263.376.773.482 1.163.242z" fill="#EFA75B" stroke-width="13"/><path d="M16.025 32.436c1.525-1.386 2.427-4.408 2.79-6.835-.084.354 2.613.43 4.138-1.208 1.078-1.125.446-2-.186-3.375-1.71-3.552-4.585-6.323-7.384-8.918-.716-.69-1.44-2.428-2.706-2-.995.353-.93 3.2-.716 4.073 1.09 7.448 4.065 18.263 4.065 18.263zm37.372-.78c-1.704-1.826-2.822-4.12-3.208-6.585 0 .354-2.614.354-4.056-1.29-.995-1.127-.362-1.86.363-3.117 1.86-3.198 4.863-5.718 7.746-8.136.81-.604 1.627-1.47 2.79-.93.994.428.715 2.334.548 3.115-1.083 5.72-2.48 11.376-4.183 16.943z" fill="#FFF"/><path d="M53.564 20.422c-1.98.51-4.138 1.636-5.105 3.487-.43-2.196 1.645-4.65 3.393-5.832.333-.21.312-.703-.037-.886-.162-.085-.357-.076-.512.022-2.157 1.562-4.417 4.5-3.784 7.188.076.262.354.41.614.325l-.075.28c-.085.603.93.864.994.26.446-2.158 2.706-3.376 4.77-3.897.372-.076.522-.526.27-.81-.133-.15-.342-.204-.53-.138zM17.457 18.06c-.55-.354-.995.428-.55.865 1.433 1.004 3.182 3.05 3.395 4.956-.93-1.86-3.05-2.975-5.105-3.486-.386-.005-.633.41-.445.747.042.076.103.14.176.184 2.073.52 4.324 1.73 4.77 3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">The background-attachment Property</h1><div class="course-theory__content-text"><p>Usually, the background image scrolls together with the content of the block. This can be clearly seen in the mini-browser. Scroll down in the window and watch how the background moves upwards.</p><p>With the <code>background-attachment</code> property, the background can be locked in place and will not move when you scroll.</p><p>The property value is:</p><ul><li><code>scroll</code> – The background scrolls along with the content. This is the default value.</li><li><code>fixed</code> – The background does not scroll. It is fixed in one place.</li></ul><p>This is a case where it is easier to show than to offer an explanation: complete the assignment and watch how the background behavior changes as you scroll.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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<html lang="en">
<head>
<meta charset="utf-8">
<title>The background-attachment Property</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="block"></div>
<div class="block"></div>
<div class="block"></div>
<div class="block"></div>
</body>
</html>
</div></div><div class="js--editor course-editor course-layout__editor course-editor--hidden" id="" data-tab="css" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">CSS</span><button class="course-editor__label-item course-editor__label-item--interactive hidden js--editor__unsplit-button course-editor__label-item--simple" title="No split" type="button"><svg width="7" height="10" viewBox="0 0 7 10" xmlns="http://www.w3.org/2000/svg"><g stroke="currentColor" fill="none" fill-rule="evenodd"><path stroke-linecap="round" d="M.6 3.503L3.443.518l2.842 2.985"></path><path d="M3.5 1.5v7.16" stroke-linecap="square"></path></g></svg></button></span><div class="course-editor__item" id="css-editor">body {
background-color: black;
background-image: url("moon.jpg");
background-position: 50% 0;
background-repeat: no-repeat;
}
.block {
width: 192px;
height: 256px;
margin: 20px auto;
background-color: #34495e;
background-repeat: no-repeat;
background-position: 50% 50%;
border-radius: 5px;
}
.block:nth-child(1) {
background-image: url("cat_clean.png");
}
.block:nth-child(2) {
background-image: url("cat_fight.png");
}
.block:nth-child(3) {
background-image: url("cat_hiss.png");
}
.block:nth-child(4) {
background-image: url("cat_poo.png");
}
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