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| (function () { | |
| function onLoad() { | |
| return function imageDefer() { | |
| var defer = document.getElementsByTagName('img'); | |
| (defer && defer.length < 0) && Object.keys(defer).forEach(function (i) { | |
| (defer[i].getAttribute('data-src')) && | |
| defer[i].setAttribute('src', defer[i].getAttribute('data-src')); | |
| }); | |
| } | |
| } | |
| // Init function inside window.onload | |
| window.onload = onLoad; | |
| })(); |
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| <!DOCTYPE html> | |
| <html > | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Image Defer</title> | |
| <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"> | |
| <style type="text/css"> | |
| .container { | |
| width: 50%; | |
| margin: 50px auto; | |
| } | |
| .container img { | |
| width: 100%; | |
| max-width: 100%; | |
| height: auto; | |
| margin-bottom: 25px; | |
| border-radius: 4px; | |
| } | |
| .container h1 { | |
| display: block; | |
| padding: 25px 0; | |
| text-align: center; | |
| border-bottom: 1px solid #ddd; | |
| } | |
| small { | |
| position: fixed; | |
| bottom: 20px; | |
| right: 20px; | |
| padding: 5px 10px; | |
| color: #fff; | |
| border-radius: 5px; | |
| background-color: #000; | |
| opacity: 0; | |
| -webkit-transition: opacity .5s ease-in; | |
| transition: opacity .5s ease-in; | |
| } | |
| small.fadeIn { | |
| opacity: 1; | |
| -webkit-transition: opacity .5s ease-in; | |
| transition: opacity .5s ease-in; | |
| } | |
| .pulsate { animation: pulse .5s infinite; } | |
| @keyframes pulse { | |
| 0% { opacity: 0.25; } | |
| 50% { opacity: 0.5; } | |
| 100% { opacity: 0.25; } | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class='container'> | |
| <h1>Image Defer</h1> | |
| <img class="pulsate" data-src='https://images.unsplash.com/photo-1502083728181-687546e77613' src="data:image/svg+xml,%3Csvg width='1024' height='512' viewBox='0 0 1024 512' xmlns='http://www.w3.org/2000/svg'%3E%3Ctitle%3ERectangle%3C/title%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath fill='%23E0E0E0' d='M0 0h1024v512H0z'/%3E%3Cpath d='M550.5 246c9.11 0 16.5-7.39 16.5-16.5s-7.39-16.5-16.5-16.5-16.5 7.39-16.5 16.5 7.39 16.5 16.5 16.5z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3Cpath d='M579.438 191H445.563c-5.328 0-9.563 4.333-9.563 9.654v111.692c0 5.32 4.235 9.654 9.563 9.654h133.875c5.327 0 9.562-4.333 9.562-9.654V200.654c0-5.32-4.235-9.654-9.563-9.654zm-35.21 67.445c-1.026-1.194-2.597-2.116-4.372-2.116-1.742 0-2.972.818-4.372 1.944l-6.386 5.39c-1.332.955-2.39 1.603-3.928 1.603-1.468 0-2.8-.545-3.756-1.398-.342-.308-.957-.888-1.47-1.4l-18.373-19.855c-1.365-1.57-3.414-2.558-5.702-2.558s-4.406 1.126-5.737 2.66l-43.2 52.06v-88.87c.34-2.32 2.15-3.99 4.472-3.99h122.16c2.358 0 4.27 1.74 4.407 4.093l.1 88.835-33.843-36.4z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3C/g%3E%3C/svg%3E"> | |
| <img class="pulsate" data-src='https://images.unsplash.com/photo-1502082553048-f009c37129b9' src="data:image/svg+xml,%3Csvg width='1024' height='512' viewBox='0 0 1024 512' xmlns='http://www.w3.org/2000/svg'%3E%3Ctitle%3ERectangle%3C/title%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath fill='%23E0E0E0' d='M0 0h1024v512H0z'/%3E%3Cpath d='M550.5 246c9.11 0 16.5-7.39 16.5-16.5s-7.39-16.5-16.5-16.5-16.5 7.39-16.5 16.5 7.39 16.5 16.5 16.5z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3Cpath d='M579.438 191H445.563c-5.328 0-9.563 4.333-9.563 9.654v111.692c0 5.32 4.235 9.654 9.563 9.654h133.875c5.327 0 9.562-4.333 9.562-9.654V200.654c0-5.32-4.235-9.654-9.563-9.654zm-35.21 67.445c-1.026-1.194-2.597-2.116-4.372-2.116-1.742 0-2.972.818-4.372 1.944l-6.386 5.39c-1.332.955-2.39 1.603-3.928 1.603-1.468 0-2.8-.545-3.756-1.398-.342-.308-.957-.888-1.47-1.4l-18.373-19.855c-1.365-1.57-3.414-2.558-5.702-2.558s-4.406 1.126-5.737 2.66l-43.2 52.06v-88.87c.34-2.32 2.15-3.99 4.472-3.99h122.16c2.358 0 4.27 1.74 4.407 4.093l.1 88.835-33.843-36.4z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3C/g%3E%3C/svg%3E"> | |
| <img class="pulsate" data-src='https://images.unsplash.com/photo-1452698325353-b90e60289e87' src="data:image/svg+xml,%3Csvg width='1024' height='512' viewBox='0 0 1024 512' xmlns='http://www.w3.org/2000/svg'%3E%3Ctitle%3ERectangle%3C/title%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath fill='%23E0E0E0' d='M0 0h1024v512H0z'/%3E%3Cpath d='M550.5 246c9.11 0 16.5-7.39 16.5-16.5s-7.39-16.5-16.5-16.5-16.5 7.39-16.5 16.5 7.39 16.5 16.5 16.5z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3Cpath d='M579.438 191H445.563c-5.328 0-9.563 4.333-9.563 9.654v111.692c0 5.32 4.235 9.654 9.563 9.654h133.875c5.327 0 9.562-4.333 9.562-9.654V200.654c0-5.32-4.235-9.654-9.563-9.654zm-35.21 67.445c-1.026-1.194-2.597-2.116-4.372-2.116-1.742 0-2.972.818-4.372 1.944l-6.386 5.39c-1.332.955-2.39 1.603-3.928 1.603-1.468 0-2.8-.545-3.756-1.398-.342-.308-.957-.888-1.47-1.4l-18.373-19.855c-1.365-1.57-3.414-2.558-5.702-2.558s-4.406 1.126-5.737 2.66l-43.2 52.06v-88.87c.34-2.32 2.15-3.99 4.472-3.99h122.16c2.358 0 4.27 1.74 4.407 4.093l.1 88.835-33.843-36.4z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3C/g%3E%3C/svg%3E"> | |
| <img class="pulsate" data-src='https://images.unsplash.com/photo-1437622368342-7a3d73a34c8f' src="data:image/svg+xml,%3Csvg width='1024' height='512' viewBox='0 0 1024 512' xmlns='http://www.w3.org/2000/svg'%3E%3Ctitle%3ERectangle%3C/title%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath fill='%23E0E0E0' d='M0 0h1024v512H0z'/%3E%3Cpath d='M550.5 246c9.11 0 16.5-7.39 16.5-16.5s-7.39-16.5-16.5-16.5-16.5 7.39-16.5 16.5 7.39 16.5 16.5 16.5z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3Cpath d='M579.438 191H445.563c-5.328 0-9.563 4.333-9.563 9.654v111.692c0 5.32 4.235 9.654 9.563 9.654h133.875c5.327 0 9.562-4.333 9.562-9.654V200.654c0-5.32-4.235-9.654-9.563-9.654zm-35.21 67.445c-1.026-1.194-2.597-2.116-4.372-2.116-1.742 0-2.972.818-4.372 1.944l-6.386 5.39c-1.332.955-2.39 1.603-3.928 1.603-1.468 0-2.8-.545-3.756-1.398-.342-.308-.957-.888-1.47-1.4l-18.373-19.855c-1.365-1.57-3.414-2.558-5.702-2.558s-4.406 1.126-5.737 2.66l-43.2 52.06v-88.87c.34-2.32 2.15-3.99 4.472-3.99h122.16c2.358 0 4.27 1.74 4.407 4.093l.1 88.835-33.843-36.4z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3C/g%3E%3C/svg%3E"> | |
| <img class="pulsate" data-src='https://images.unsplash.com/photo-1441260038675-7329ab4cc264' src="data:image/svg+xml,%3Csvg width='1024' height='512' viewBox='0 0 1024 512' xmlns='http://www.w3.org/2000/svg'%3E%3Ctitle%3ERectangle%3C/title%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath fill='%23E0E0E0' d='M0 0h1024v512H0z'/%3E%3Cpath d='M550.5 246c9.11 0 16.5-7.39 16.5-16.5s-7.39-16.5-16.5-16.5-16.5 7.39-16.5 16.5 7.39 16.5 16.5 16.5z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3Cpath d='M579.438 191H445.563c-5.328 0-9.563 4.333-9.563 9.654v111.692c0 5.32 4.235 9.654 9.563 9.654h133.875c5.327 0 9.562-4.333 9.562-9.654V200.654c0-5.32-4.235-9.654-9.563-9.654zm-35.21 67.445c-1.026-1.194-2.597-2.116-4.372-2.116-1.742 0-2.972.818-4.372 1.944l-6.386 5.39c-1.332.955-2.39 1.603-3.928 1.603-1.468 0-2.8-.545-3.756-1.398-.342-.308-.957-.888-1.47-1.4l-18.373-19.855c-1.365-1.57-3.414-2.558-5.702-2.558s-4.406 1.126-5.737 2.66l-43.2 52.06v-88.87c.34-2.32 2.15-3.99 4.472-3.99h122.16c2.358 0 4.27 1.74 4.407 4.093l.1 88.835-33.843-36.4z' fill='%23F6F6F6' fill-rule='nonzero'/%3E%3C/g%3E%3C/svg%3E"> | |
| </div> | |
| <small id="perfTime"></small> | |
| <script> | |
| const perfElement = document.getElementById('perfTime'); | |
| function deferImg() { | |
| const defer = document.getElementsByTagName('img'); | |
| Object.keys(defer).forEach((i) => { | |
| if (defer[i].getAttribute('data-src')) { | |
| defer[i].setAttribute('src', defer[i].getAttribute('data-src')) | |
| setTimeout(() => defer[i].classList.remove('pulsate'), 500) | |
| } | |
| }) | |
| } | |
| window.onload = () => { | |
| setTimeout(() => { | |
| deferImg(); | |
| var perfTime = 'Page Loaded in ' + (performance.now() / 1000).toFixed(2) + ' seconds'; | |
| console.info(perfTime); | |
| perfElement.innerHTML += perfTime; | |
| setTimeout(() => perfElement.classList.add('fadeIn'), 1000) | |
| }, 0) | |
| } | |
| </script> | |
| </body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html > | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Image Defer</title> | |
| <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"> | |
| <style type="text/css"> | |
| .container { | |
| width: 50%; | |
| margin: 50px auto; | |
| } | |
| .container img { | |
| width: 100%; | |
| max-width: 100%; | |
| height: auto; | |
| margin-bottom: 25px; | |
| border-radius: 4px; | |
| } | |
| .container h1 { | |
| display: block; | |
| padding: 25px 0; | |
| text-align: center; | |
| border-bottom: 1px solid #ddd; | |
| } | |
| small { | |
| position: fixed; | |
| bottom: 20px; | |
| right: 20px; | |
| padding: 5px 10px; | |
| color: #fff; | |
| border-radius: 5px; | |
| background-color: #000; | |
| opacity: 0; | |
| -webkit-transition: opacity .5s ease-in; | |
| transition: opacity .5s ease-in; | |
| } | |
| small.fadeIn { | |
| opacity: 1; | |
| -webkit-transition: opacity .5s ease-in; | |
| transition: opacity .5s ease-in; | |
| } | |
| .pulsate { animation: pulse .5s infinite; } | |
| @keyframes pulse { | |
| 0% { opacity: 0.25; } | |
| 50% { opacity: 0.5; } | |
| 100% { opacity: 0.25; } | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class='container'> | |
| <h1>No Defer</h1> | |
| <img src='https://images.unsplash.com/photo-1502083728181-687546e77613'> | |
| <img src='https://images.unsplash.com/photo-1502082553048-f009c37129b9'> | |
| <img src='https://images.unsplash.com/photo-1452698325353-b90e60289e87'> | |
| <img src='https://images.unsplash.com/photo-1437622368342-7a3d73a34c8f'> | |
| <img src='https://images.unsplash.com/photo-1441260038675-7329ab4cc264'> | |
| </div> | |
| <small id="perfTime"></small> | |
| <script> | |
| const perfElement = document.getElementById('perfTime'); | |
| function deferImg() { | |
| const defer = document.getElementsByTagName('img'); | |
| Object.keys(defer).forEach((i) => { | |
| if (defer[i].getAttribute('data-src')) { | |
| defer[i].setAttribute('src', defer[i].getAttribute('data-src')) | |
| setTimeout(() => defer[i].classList.remove('pulsate'), 500) | |
| } | |
| }) | |
| } | |
| window.onload = () => { | |
| setTimeout(() => { | |
| deferImg(); | |
| var perfTime = 'Page Loaded in ' + (performance.now() / 1000).toFixed(2) + ' seconds'; | |
| console.info(perfTime); | |
| perfElement.innerHTML += perfTime; | |
| setTimeout(() => perfElement.classList.add('fadeIn'), 1000) | |
| }, 0) | |
| } | |
| </script> | |
| </body> | |
| </html> |
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