title: How to call this javascript function from WKWebView Swift?
body: <p>So I have this function on my site:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>function appQrHandlerSet(result) {
      jQuery(function() {
          jQuery('#readed_qr_url').val(result.url);
          jQuery(this).getLayerForm('#qr_handler_layer');
              });      
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p>From the iOS app, I have to call this function and pass a JSON to it, how can I achieve that?
  I've been trying to make it work for 3 days now, but I gave up because something is not working right.</p>
  
  <p>Thanks in advance!</p>