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cat draggin'
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| /** | |
| * cat draggin' | |
| */ | |
| html, | |
| body | |
| { | |
| min-height: 100%; | |
| min-width: 100%; | |
| margin: 0; padding: 0; | |
| } | |
| div | |
| { | |
| font-size: 5em; | |
| width: 2em; height: 2em; line-height: 2.25em; | |
| text-align: center; | |
| border: black dashed thin; | |
| border-radius: 1em; | |
| position: absolute; | |
| top: 0; left: 0; | |
| cursor: pointer; | |
| } |
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| <div>😸</div> |
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| var el = document.getElementsByTagName('div')[0], | |
| elSize = el.offsetWidth; | |
| function grab (event) | |
| { | |
| var rect = event.target.getBoundingClientRect(); | |
| // cross-browser offsetX, offsetY | |
| // source: http://www.jacklmoore.com/notes/mouse-position/ | |
| el.dataset.grabbedX = event.clientX - rect.left; // offsetX | |
| el.dataset.grabbedY = event.clientY - rect.top; // offsetY | |
| event.preventDefault(); | |
| } | |
| function letGo (event) | |
| { | |
| delete el.dataset.grabbedX; | |
| delete el.dataset.grabbedY; | |
| } | |
| function drag (x, y) | |
| { | |
| delete el.dataset.queued; | |
| el.style.top = Math.min( | |
| window.innerHeight - elSize, | |
| Math.max(0, y) | |
| ) + 'px'; | |
| el.style.left = Math.min( | |
| window.innerWidth - elSize, | |
| Math.max(0, x) | |
| ) + 'px'; | |
| } | |
| function dragPerhaps (event) | |
| { | |
| event.preventDefault(); | |
| if (!el.dataset.queued && el.dataset.grabbedX) | |
| { | |
| el.dataset.queued = true; | |
| window.requestAnimationFrame(drag.bind( | |
| drag, | |
| event.pageX - el.dataset.grabbedX, | |
| event.pageY - el.dataset.grabbedY | |
| )); | |
| } | |
| } | |
| el.addEventListener('mousedown', grab); | |
| document.addEventListener('mouseup', letGo); | |
| document.addEventListener('mousemove', dragPerhaps); |
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| <head> | |
| <link rel="stylesheet" type="text/css" href=./dabblet.css> | |
| </head> | |
| <body> | |
| <div>😸</div> | |
| <script src=./dabblet.js></script> | |
| </body> |
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| {"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"} |
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