Add bookmarkOutput

srcjs/output_binding_bookmark.js

@@ -0,0 +1,20 @@
+var bookmarkOutputBinding = new OutputBinding();
+$.extend(bookmarkOutputBinding, {
+  find: function(scope) {
+    return $(scope).find('.shiny-bookmark-output');
+  },
+  renderValue: function(el, data) {
+    const $el = $(el);
+    const $button = $el.find('button');
+
+    // Initialize clipboardjs for this element, one time only
+    if (!$button.data('clipboard-initialized')) {
+      new Clipboard($button[0]);
+      $button.data('clipboard-initialized', true);
+    }
+
+    $el.find('input')[0].value = location.protocol + '//' + location.host +
+      location.pathname + '?' + data;
+  }
+});
+outputBindings.register(bookmarkOutputBinding, 'shiny.bookmarkOutput');