Answers for "how to make copy function in javascript"

copyWithin JavaScript

copyWithin(target); //target where to copy the sequence to
copyWithin(target, start); //copy to index target all elems at index start to end
copyWithin(target, start, end); //copy to index of target elem at index of start

javascript copy clipboard

<a href="' + artworkUrl + '" onclick="copyURI(event)">Copy cover URL</a>