hello world.
Created
November 28, 2014 02:23
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hello world.
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<canvas id="main"></canvas> |
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(function(win, doc) { | |
"use strict"; | |
var main = doc.getElementById("main"), | |
mainCtx = main.getContext("2d"), | |
sub = doc.createElement("canvas"), | |
subCtx = sub.getContext("2d"), | |
i = 0, | |
WIDTH = 250, | |
HEIGHT = 50, | |
SIZE = 5, | |
INTERVAL = 5; | |
main.width = sub.width = WIDTH; | |
main.height = sub.height = HEIGHT; | |
build(0); | |
setInterval(function() { | |
main.width = WIDTH; | |
mainCtx.font = "30px AvenirNext-Heavy"; | |
mainCtx.fillText("HELLO WORLD.", 0, 30); | |
mainCtx.globalCompositeOperation = "destination-in"; | |
mainCtx.drawImage(sub, 0, 0); | |
}, 1000 / 24); | |
function build(i) { | |
var height = HEIGHT / SIZE, | |
max = (i + 1 < height) ? (i + 1) : height; | |
(function setRect(j) { | |
if (j < max) { | |
subCtx.rect((i -j) * SIZE, j * SIZE, SIZE, SIZE); | |
subCtx.fill(); | |
setTimeout(function() { | |
setRect(++j); | |
}, INTERVAL); | |
} else { | |
if ((i - HEIGHT / SIZE) * SIZE < win.innerWidth) { | |
build(++i); | |
} | |
} | |
})(0); | |
} | |
})(this, document); |
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@import "compass/css3"; | |
body { | |
background: #e3e3e3; | |
} | |
#main { | |
position: absolute; | |
top: 50%; left: 50%; | |
margin: -15px -125px; | |
width: 250px; height: 50px; | |
} |
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