export default function polyfillNodeListForEach ( ) { if ( "NodeList" in window && ! NodeList . prototype . forEach ) { NodeList . prototype . forEach = function ( callback , thisArg ) { thisArg = thisArg || window ; for ( let i = 0 ; i < this . length ; i ++ ) { callback . call ( thisArg , this [ i ] , i , this ) ; } } ; } }