<p></p>
<p dir="auto">We have a file with many libraries (jQuery and co). If one of the code uses for example arrow-functions this whole file will brake in Safari 9 and IE11. Thats why you see problems with <code class="notranslate">$(document)</code> because <code class="notranslate">$</code> is jQuery.<br>
<a href="https://caniuse.com/arrow-functions" rel="nofollow">https://caniuse.com/arrow-functions</a></p>
<p dir="auto">The code uses some modern stuff. So tuning some stuff will probably a bottomless pit.</p>

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