Skip to content

Instantly share code, notes, and snippets.

@nolanlawson

nolanlawson/adblock_256x256.png

Last active May 2, 2018 22:06
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save nolanlawson/70d9bbb5887b540164aea8dfacbc3b23 to your computer and use it in GitHub Desktop.
Save nolanlawson/70d9bbb5887b540164aea8dfacbc3b23 to your computer and use it in GitHub Desktop.
Download ZIP
Lazy loading images demo with IntersectionObserver
Raw
index.html
<!doctype html>
<html lang="en">
<head>
<title>Lazy image loading demo</title>
<style>
img {
display: block;
margin: 0 auto;
padding: 20px;
}
body {
max-width: 600px;
margin: 0 auto;
padding: 20px;
}
</style>
</head>
<body>
<h1>Lazy image loading demo</h1>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute
irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. </p>
<img data-src="amazon-internet_256x256.png" width="256" height="256" />
<img data-src="android-webview-beta_256x256.png" width="256" height="256" />
<img data-src="avant_256x256.png" width="256" height="256" />
<img data-src="beaker_256x256.png" width="256" height="256" />
<img data-src="blisk_256x256.png" width="256" height="256" />
<img data-src="brave_256x256.png" width="256" height="256" />
<img data-src="browser.html_256x256.png" width="256" height="256" />
<img data-src="cent_256x256.png" width="256" height="256" />
<img data-src="chrome_256x256.png" width="256" height="256" />
<img data-src="chrome-beta_256x256.png" width="256" height="256" />
<img data-src="chrome-canary_256x256.png" width="256" height="256" />
<img data-src="chrome-dev_256x256.png" width="256" height="256" />
<img data-src="chromium_256x256.png" width="256" height="256" />
<img data-src="cm_256x256.png" width="256" height="256" />
<img data-src="crusta_256x256.png" width="256" height="256" />
<img data-src="dolphin_256x256.png" width="256" height="256" />
<img data-src="dolphin-zero_256x256.png" width="256" height="256" />
<img data-src="dooble_256x256.png" width="256" height="256" />
<img data-src="edge_256x256.png" width="256" height="256" />
<img data-src="edge-tile_256x256.png" width="256" height="256" />
<img data-src="firefox_256x256.png" width="256" height="256" />
<img data-src="firefox-beta_256x256.png" width="256" height="256" />
<img data-src="firefox-developer-edition_256x256.png" width="256" height="256" />
<img data-src="firefox-nightly_256x256.png" width="256" height="256" />
<img data-src="icab-mobile_256x256.png" width="256" height="256" />
<img data-src="icecat_256x256.png" width="256" height="256" />
<img data-src="jsdom_256x256.png" width="256" height="256" />
<img data-src="lightning_256x256.png" width="256" height="256" />
<img data-src="maxthon_256x256.png" width="256" height="256" />
<img data-src="mihtool_256x256.png" width="256" height="256" />
<img data-src="min_256x256.png" width="256" height="256" />
<img data-src="netsurf_256x256.png" width="256" height="256" />
<img data-src="nw.js_256x256.png" width="256" height="256" />
<img data-src="onion_256x256.png" width="256" height="256" />
<img data-src="opera_256x256.png" width="256" height="256" />
<img data-src="opera-beta_256x256.png" width="256" height="256" />
<img data-src="opera-developer_256x256.png" width="256" height="256" />
<img data-src="opera-mini_256x256.png" width="256" height="256" />
<img data-src="opera-mini-beta_256x256.png" width="256" height="256" />
<img data-src="opera-neon_256x256.png" width="256" height="256" />
<img data-src="opera-touch_256x256.png" width="256" height="256" />
<img data-src="orbitum_256x256.png" width="256" height="256" />
<img data-src="otter_256x256.png" width="256" height="256" />
<img data-src="pale-moon_256x256.png" width="256" height="256" />
<img data-src="polarity_256x256.png" width="256" height="256" />
<img data-src="puffin_256x256.png" width="256" height="256" />
<img data-src="qupzilla_256x256.png" width="256" height="256" />
<img data-src="qutebrowser_256x256.png" width="256" height="256" />
<img data-src="safari_256x256.png" width="256" height="256" />
<img data-src="safari-ios_256x256.png" width="256" height="256" />
<img data-src="safari-technology-preview_256x256.png" width="256" height="256" />
<img data-src="samsung-internet_256x256.png" width="256" height="256" />
<img data-src="samsung-internet-beta_256x256.png" width="256" height="256" />
<img data-src="seamonkey_256x256.png" width="256" height="256" />
<img data-src="silk_256x256.png" width="256" height="256" />
<img data-src="sogou-mobile_256x256.png" width="256" height="256" />
<img data-src="tob_256x256.png" width="256" height="256" />
<img data-src="tor_256x256.png" width="256" height="256" />
<img data-src="uc_256x256.png" width="256" height="256" />
<img data-src="uc-mini_256x256.png" width="256" height="256" />
<img data-src="v8_256x256.png" width="256" height="256" />
<img data-src="v8-ignition_256x256.png" width="256" height="256" />
<img data-src="v8-turbofan_256x256.png" width="256" height="256" />
<img data-src="yandex_256x256.png" width="256" height="256" />
<img data-src="yandex-alpha_256x256.png" width="256" height="256" />
<img data-src="yandex-beta_256x256.png" width="256" height="256" />
<img data-src="yandex-lite_256x256.png" width="256" height="256" />
<script>
(() => {
let images = document.querySelectorAll('img')
let observer = new IntersectionObserver(entries => {
for (let entry of entries) {
if (entry.isIntersecting) {
let src = entry.target.getAttribute('data-src')
entry.target.setAttribute('src', src)
}
}
})
for (let image of images) {
observer.observe(image)
}
})()
</script>
</body>
</html>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment