fix: Fix fullscreen functionality in mobile.html

packages/artplayer/src/player/fullscreenMix.js

@@ -35,37 +35,18 @@ export default function fullscreenMix(art) {
         });
     };
 
-    const requestFullscreen =
-        $video.requestFullscreen ||
-        $video.mozRequestFullScreen ||
-        $video.webkitRequestFullscreen ||
-        $video.msRequestFullscreen;
-
-    const exitFullscreen =
-        document.exitFullscreen ||
-        document.mozCancelFullScreen ||
-        document.webkitExitFullscreen ||
-        document.msExitFullscreen;
-
-    const isFullscreenEnabled =
-        document.fullscreenEnabled ||
-        document.webkitFullscreenEnabled ||
-        document.mozFullScreenEnabled ||
-        document.msFullscreenEnabled ||
-        $video.webkitSupportsFullscreen;
-
     const webkitScreenfull = (art) => {
         def(art, 'fullscreen', {
             get() {
-                return document.fullscreenElement || $video.webkitDisplayingFullscreen;
+                return $video.webkitDisplayingFullscreen;
             },
             set(value) {
                 if (value) {
                     art.state = 'fullscreen';
-                    requestFullscreen.call($video);
+                    $video.webkitEnterFullscreen();
                     art.emit('fullscreen', true);
                 } else {
-                    exitFullscreen.call(document);
+                    $video.webkitExitFullscreen();
                     art.emit('fullscreen', false);
                 }
                 art.emit('resize');
@@ -76,7 +57,7 @@ export default function fullscreenMix(art) {
     art.once('video:loadedmetadata', () => {
         if (screenfull.isEnabled) {
             nativeScreenfull(art);
-        } else if (isFullscreenEnabled) {
+        } else if (document.fullscreenEnabled || $video.webkitSupportsFullscreen) {
             webkitScreenfull(art);
         } else {
             def(art, 'fullscreen', {