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March 25, 2016 18:47
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Find ancestor element by class.
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| function findAncestor(el, cls) { | |
| if (el === document) { | |
| return false; | |
| } | |
| if (el.classList.contains(cls)) { | |
| return true; | |
| } | |
| return el.parentNode && findAncestor(el.parentNode, cls); | |
| } |
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