A small snippet to determine if a node is child of any one of a selection of nodes.
isChildOf(node, selection) // -> true/false
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Check if node is child of a selection of nodes
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| function( | |
| t, // target | |
| s, // selected nodes | |
| p, // placeholder for target/parents | |
| i, // counter | |
| o // placeholder for "ownerDocument" | |
| ){ | |
| // iterate over selection | |
| for (i = 0; i < s.length; i++) | |
| for( | |
| // check if the selected node is in the same DOM as the target, | |
| // otherwise set p to false to stop this loop from iterating the parentNodes | |
| p = t[o='ownerDocument'] === s[i][o] && t; | |
| p; // continue iteration as long as parentNodes are present | |
| p = p.parentNode) | |
| // found a match? return true | |
| if (p === s[i]) | |
| return!0; | |
| // nothing found? return false | |
| return!1 | |
| } |
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| function(t,s,p,i,o){for(i=0;i<s.length;i++)for(p=t[o='ownerDocument']===s[i][o]&&t;p;p=p.parentNode)if(p===s[i])return!0;return!1} |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 Alex Lohr (formerly Kloss) alexthkloss@web.de | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
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| { | |
| "name": "isChildOf", | |
| "description": "Check if node is child of a selection of nodes", | |
| "keywords": [ | |
| "node", | |
| "child", | |
| "selection", | |
| "DOM" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <title>Foo</title> | |
| <div>Expected value: <b>true</b></div> | |
| <div>Actual value: <b id="ret"></b></div> | |
| <script> | |
| // write a small example that shows off the API for your example | |
| // and tests it in one fell swoop. | |
| var myFunction = function(t,s,p,i,o){for(i=0;i<s.length;i++)for(p=t[o='ownerDocument']===s[i][o]&&t;p;p=p.parentNode)if(p===s[i])return!0;return!1} | |
| document.getElementById( "ret" ).innerHTML = myFunction(document.getElementById( "ret" ), document.getElementsByTagName('div')); | |
| </script> |
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