Created
June 22, 2016 03:01
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Transitioning the opacity of a hidden element
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| <!doctype html> | |
| <meta charset="utf-8"> | |
| <title>Example</title> | |
| <style> | |
| div { | |
| width: 100px; | |
| height: 100px; | |
| background: black; | |
| animation-duration: .5s; | |
| animation-fill-mode: forwards | |
| } | |
| .show { animation-name: show } | |
| .hide { animation-name: hide } | |
| @keyframes show { 0% { opacity: 0 } 100% { opacity: 1 } } | |
| @keyframes hide { 0% { opacity: 1 } 100% { opacity: 0 } } | |
| </style> | |
| <button>toggle</button> | |
| <div hidden></div> | |
| <script> | |
| { | |
| let button = document.querySelector("button"); | |
| let div = button.nextElementSibling; | |
| let open = false; | |
| button.addEventListener("click", () => { | |
| div.hidden = false; | |
| div.className = open ? "hide" : "show"; | |
| open = !open; | |
| }); | |
| div.addEventListener("animationend", () => { | |
| if (!open) div.hidden = true; | |
| }); | |
| } | |
| </script> |
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