Bringing back the screensaver! It would support IE but I ran out of bytes. This requires an absolutely positioned element in order to work (as the collision box).
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Screensaver
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function( | |
a, //References an absolutely positioned collision box style property | |
b, //The width to use for the collision box | |
c, //The height to use for the collision box | |
d, //Starting x coordinate and placeholder for x coordinate of the box | |
e, //Starting y coordinate and placeholder for x coordinate of the box | |
j //Interval to redraw the box | |
){function h(){ //Redraw the box | |
a.left= //Set the x coordinate | |
(d+= //by adding or subtracting it to the current x coordinate | |
b*= //by adding or subtracting the box width | |
d<0|d>innerWidth?-1:1) //by checking if it is still inside the viewport and multiplying in the appropriate direction | |
+'px'; //and then setting the coordinate to the style property | |
a.top= //Set the y coordinate | |
(e+= //by adding or subtracting it to the current y coordinate | |
c*= //by adding or subtracting the box height | |
e<0|e>innerHeight?-1:1) //by checking if it is still inside the viewport and multiplying in the appropriate direction | |
+'px' //and then setting the coordinate to the style property | |
}setInterval(h,j) //and then calling a redraw to move the box at the given interval | |
} |
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<html> | |
<body> | |
<div id="ScreenSaver" style="position:absolute;"> | |
<img width="100" height="100" alt="" src="http://mied.la/images/ss140.gif"> | |
<p>My Screensaver</p> | |
</div> | |
<script> | |
var showScreenSaver = function(a,b,c,d,e,j){function h(){a.left=(d+=b*=d<0|d>innerWidth?-1:1)+'px';a.top=(e+=c*=e<0|e>innerHeight?-1:1)+'px'}setInterval(h,j)} | |
showScreenSaver(document.getElementById('ScreenSaver').style, 100, 100, 100, 100, 350); | |
</script> | |
</body> | |
</html> |
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function(a,b,c,d,e,j){function h(){a.left=(d+=b*=d<0|d>innerWidth?-1:1)+'px';a.top=(e+=c*=e<0|e>innerHeight?-1:1)+'px'}setInterval(h,j)} |
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Copyright (c) 2011 Brian Miedlar, mied.la | |
Permission is hereby granted, free of charge, to any person obtaining | |
a copy of this software and associated documentation files (the | |
"Software"), to deal in the Software without restriction, including | |
without limitation the rights to use, copy, modify, merge, publish, | |
distribute, sublicense, and/or sell copies of the Software, and to | |
permit persons to whom the Software is furnished to do so, subject to | |
the following conditions: | |
The above copyright notice and this permission notice shall be | |
included in all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | |
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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{ | |
"name": "Screensaver", | |
"description": "Moving an element around the screen as expected in a simple screensaver", | |
"keywords": [ | |
"screensaver" | |
] | |
} |
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