Created
March 20, 2017 17:29
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> | |
| <meta name="author" content="" /> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>Box Style Change</title> | |
| <style> | |
| html, body { | |
| background: #ECECEC; | |
| } | |
| body .box-container div{ | |
| display: inline-block; | |
| width: 40px; | |
| height: 40px; | |
| background: #FFF; | |
| box-shadow: 0 1px 1px rgba(0,0,0,0.3); | |
| margin: 5px; | |
| position: relative; | |
| will-change: background-color; | |
| } | |
| body .box-container div.box { | |
| background-color: #777; | |
| } | |
| button { | |
| margin: 0 auto; | |
| padding: 20px; | |
| background: #CC0000; | |
| font-size: 20px; | |
| border: none; | |
| border-radius: 3px; | |
| box-shadow: 0 1px 1px rgba(0,0,0,0.3); | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <button>Click me</button> | |
| <main> | |
| <div class="box-container"> | |
| </div> | |
| </main> | |
| <script> | |
| var container = document.querySelector('.box-container'); | |
| var button = document.querySelector('button'); | |
| for (var i = 0; i < 3000; i++) { | |
| var div = document.createElement('div'); | |
| div.index = i; | |
| container.appendChild(div); | |
| } | |
| button.addEventListener('click', function() { | |
| document.querySelectorAll(".box-container div:nth-child(2n)").forEach( (ele) => ele.classList.toggle('box')); | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
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