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Forked from 140bytes/LICENSE.txt
Last active October 6, 2015 14:18
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get offset of element

140byt.es

A tweet-sized, fork-to-play, community-curated collection of JavaScript.

How to play

  1. Click the Fork button above to fork this gist.
  2. Modify all the files to according to the rules below.
  3. Save your entry and tweet it up!

Keep in mind that thanks to the awesome sensibilities of the GitHub team, gists are just repos. So feel free to clone yours and work locally for a more comfortable environment, and to allow commit messages.

Rules

All entries must exist in an index.js file, whose contents are

  1. an assignable, valid Javascript expression, that
  2. contains no more than 140 bytes, and
  3. does not leak to the global scope.

All entries must also be licensed under a license as or more permitting than the MIT license.

For more information

The 140byt.es site hasn't launched yet, but for now follow @140bytes on Twitter.

To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.

140byt.es is brought to you by Jed Schmidt. It was inspired by work from Thomas Fuchs and Dustin Diaz.

function(){
/* Rules:
(1) anonymous function // make sure
(2) may be self-executing // to annotate
(3) <=140 bytes // your code
(4) no globals // so everyone
(5) MIT license // can learn
(6) have a good time! // from it!
*/}
function(){/*Rules: (1) anonymous function (2) may be self-executing (3) <=140 bytes (4) no globals (5) MIT license (6) have a good time!*/}
Copyright (c) 2011 YOUR_NAME_HERE, YOUR_URL_HERE
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.
{
// [REQUIRED] A name for your library.
// This must match /^[a-z_]\w*$/i
"name": "140bytes",
// [OPTIONAL] A description of your library, phrased as a verb predicate.
// The gist description is used by default.
"description": "Explain the 140byt.es rules.",
// [OPTIONAL] Up to 5 keywords used for indexing.
"keywords": [
"140bytes",
"master",
"rules"
]
}
@atk
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atk commented Jun 28, 2012

Why not both in one function?

function(a,x,y){for(x=y=0;a;a=a.offsetParent)x+=(a.offsetLeft||0),y+=(a.offsetTop||0);return{left:x,top:y}}

Anyway, the offset method is not very precise in some browsers (especially in Quirks mode). A better way to go (if available) is to use getBoundingClientRect, though this results in relative positions to the visible browser window.

@williammalo
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Author

@atk
:D I made it one function that returns an object. Thanks for the Idea!
I originally did this as part of a "smooth scrolling to hashlink" script.
... I could make it a prototype and the function would be hidden in a getter, so you could do:

document.getElementById("foo").x
document.getElementById("foo").y

it would be a much simpler syntax but the code would be longer...

@atk
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atk commented Jun 28, 2012

This reminds me too much of the ambigious old actionscript syntax... I'll rather take the object, thanks.

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