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| 1 | +<!doctype html> |
| 2 | +<html> |
| 3 | + <head> |
| 4 | + <meta charset="utf-8"> |
| 5 | + <title>Mosaic</title> |
| 6 | + <style> |
| 7 | +#root {margin:auto;max-width:600px;width:100%;} |
| 8 | +.slice {animation:enter 1s;animation-fill-mode:forwards;background-image:url(flowers.jpg);height:60px;float:left;opacity:0;width:60px;} |
| 9 | +.slice:nth-child(10n) {clear:right;} |
| 10 | +.exit {animation:exit 1s;} |
| 11 | + |
| 12 | +@keyframes enter { |
| 13 | + from {opacity:0;transform:rotate(-90deg) scale(0);} |
| 14 | + to {opacity:1;transform:rotate(0) scale(1);} |
| 15 | +} |
| 16 | +@keyframes exit { |
| 17 | + from {opacity:1;transform:rotate(0) scale(1);} |
| 18 | + to {opacity:0;transform:rotate(90deg) scale(0);} |
| 19 | +} |
| 20 | + </style> |
| 21 | + </head> |
| 22 | + <body> |
| 23 | + <div id="root"></div> |
| 24 | + <script src="../../mithril.js"></script> |
| 25 | + <script src="../../stream/stream.js"></script> |
| 26 | + <script> |
| 27 | +var root = document.getElementById("root") |
| 28 | + |
| 29 | +const range = (start, end) => { |
| 30 | + let full = [] |
| 31 | + for (let i = start; i < end; i++) full.push(i) |
| 32 | + return full |
| 33 | +} |
| 34 | + |
| 35 | +const exit = vnode => { |
| 36 | + vnode.dom.classList.add("exit") |
| 37 | + return new Promise(function(resolve) { |
| 38 | + setTimeout(resolve, 1000) |
| 39 | + }) |
| 40 | +} |
| 41 | + |
| 42 | +const backgroundPosition = step => i => |
| 43 | + // X |
| 44 | + (i % step * (step+1)) + "% " |
| 45 | + // Y |
| 46 | + + (Math.floor(i / step) * (step+1)) + "%" |
| 47 | + |
| 48 | +// actions -> state -> vnode |
| 49 | +const view = exit => cells => |
| 50 | + m(".container", cells.map(i => |
| 51 | + m(".slice", { |
| 52 | + style: {backgroundPosition: backgroundPosition(10)(i)}, |
| 53 | + onbeforeremove: exit |
| 54 | + }) |
| 55 | + )) |
| 56 | + |
| 57 | +// delayed alternate array[0] and array[1] and pipe into actions stream |
| 58 | +const alternate = delay => array => actions => { |
| 59 | + let i = 1 |
| 60 | + setInterval(() => actions(array[i = 1 - i]), delay) |
| 61 | + return actions |
| 62 | +} |
| 63 | + |
| 64 | +// prepare stream alternating between empty and full |
| 65 | +alternate(2000)([[], range(0, 10 * 10)])(m.stream()) |
| 66 | + // pipe state stream into view |
| 67 | + .map(view(exit)) |
| 68 | + // pipe view stream into render |
| 69 | + .map(vnode => m.render(root, vnode)) |
| 70 | + |
| 71 | + </script> |
| 72 | + </body> |
| 73 | +</html> |
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