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andreasvirkus/firstAncestor.js

Created July 11, 2019 06:38
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firstAncestor.js
const firstAncestor = (el, tagName) => {
while(el = el.parentNode && (el.tagName !== tagName.toUpperCase()))
return el
}
// Usage
var child = document.getElementById('child')
firstAncestor(child, 'div'); //<div id="parent">
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