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check if possible parent exists before checking if it contains another element

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ansuz
2016-02-29 15:27:11 +01:00
parent 67bdb8a65a
commit 5425699f43
1 changed files with 5 additions and 5 deletions
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www/common/treesome.js
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@@ -96,7 +96,7 @@ define([], function () {
// not being used internally, but is useful externally
tree.contains = function (el, root) {
return el && root.contains && root.contains(el);
return el && root && root.contains && root.contains(el);
};
var siblingCount = tree.siblingCount = function (el) {