1 files changed, 31 insertions, 0 deletions
diff --git a/javascript/videojs/src/js/control-bar/volume-control/check-volume-support.js b/javascript/videojs/src/js/control-bar/volume-control/check-volume-support.js
new file mode 100644
index 0000000..88f287b
--- /dev/null
+++ b/javascript/videojs/src/js/control-bar/volume-control/check-volume-support.js
@@ -0,0 +1,31 @@
+/** @import Component from '../../component' */
+/** @import Player from '../../player' */
+
+/**
+ * Check if volume control is supported and if it isn't hide the
+ * `Component` that was passed  using the `vjs-hidden` class.
+ *
+ * @param {Component} self
+ *        The component that should be hidden if volume is unsupported
+ *
+ * @param {Player} player
+ *        A reference to the player
+ *
+ * @private
+ */
+const checkVolumeSupport = function(self, player) {
+  // hide volume controls when they're not supported by the current tech
+  if (player.tech_ && !player.tech_.featuresVolumeControl) {
+    self.addClass('vjs-hidden');
+  }
+
+  self.on(player, 'loadstart', function() {
+    if (!player.tech_.featuresVolumeControl) {
+      self.addClass('vjs-hidden');
+    } else {
+      self.removeClass('vjs-hidden');
+    }
+  });
+};
+
+export default checkVolumeSupport;