Prefix JSEvent_ function has JS-only library functions. NFC (#16905)

This avoids having to use the `_` prefix when calling them.

It also prevents them polluting the native symbol address space.

Author: sbc100

src/library_html5.js

@@ -1214,11 +1214,11 @@ var LibraryHTML5 = {
     return {{{ cDefine('EMSCRIPTEN_RESULT_SUCCESS') }}};
   },
 
-  JSEvents_requestFullscreen__deps: ['$JSEvents', 'JSEvents_resizeCanvasForFullscreen'],
-  JSEvents_requestFullscreen: function(target, strategy) {
+  $JSEvents_requestFullscreen__deps: ['$JSEvents', '$JSEvents_resizeCanvasForFullscreen'],
+  $JSEvents_requestFullscreen: function(target, strategy) {
     // EMSCRIPTEN_FULLSCREEN_SCALE_DEFAULT + EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_NONE is a mode where no extra logic is performed to the DOM elements.
     if (strategy.scaleMode != {{{ cDefine('EMSCRIPTEN_FULLSCREEN_SCALE_DEFAULT') }}} || strategy.canvasResolutionScaleMode != {{{ cDefine('EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_NONE') }}}) {
-      _JSEvents_resizeCanvasForFullscreen(target, strategy);
+      JSEvents_resizeCanvasForFullscreen(target, strategy);
     }
 
     if (target.requestFullscreen) {
@@ -1254,8 +1254,8 @@ var LibraryHTML5 = {
     return {{{ cDefine('EMSCRIPTEN_RESULT_SUCCESS') }}};
   },
 
-  JSEvents_resizeCanvasForFullscreen__deps: ['$registerRestoreOldStyle', '$getCanvasElementSize', '$setLetterbox', '$setCanvasElementSize', '$getBoundingClientRect'],
-  JSEvents_resizeCanvasForFullscreen: function(target, strategy) {
+  $JSEvents_resizeCanvasForFullscreen__deps: ['$registerRestoreOldStyle', '$getCanvasElementSize', '$setLetterbox', '$setCanvasElementSize', '$getBoundingClientRect'],
+  $JSEvents_resizeCanvasForFullscreen: function(target, strategy) {
     var restoreOldStyle = registerRestoreOldStyle(target);
     var cssWidth = strategy.softFullscreen ? innerWidth : screen.width;
     var cssHeight = strategy.softFullscreen ? innerHeight : screen.height;
@@ -1533,7 +1533,7 @@ var LibraryHTML5 = {
   },
 
   // https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Using_full_screen_mode  
-  $doRequestFullscreen__deps: ['$JSEvents', '$setLetterbox', 'emscripten_set_canvas_element_size', 'emscripten_get_canvas_element_size', '$getCanvasElementSize', '$setCanvasElementSize', 'JSEvents_requestFullscreen', '$findEventTarget'],
+  $doRequestFullscreen__deps: ['$JSEvents', '$setLetterbox', 'emscripten_set_canvas_element_size', 'emscripten_get_canvas_element_size', '$getCanvasElementSize', '$setCanvasElementSize', '$JSEvents_requestFullscreen', '$findEventTarget'],
   $doRequestFullscreen: function(target, strategy) {
     if (!JSEvents.fullscreenEnabled()) return {{{ cDefine('EMSCRIPTEN_RESULT_NOT_SUPPORTED') }}};
 #if !DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR
@@ -1563,15 +1563,15 @@ var LibraryHTML5 = {
     // Queue this function call if we're not currently in an event handler and the user saw it appropriate to do so.
     if (!canPerformRequests) {
       if (strategy.deferUntilInEventHandler) {
-        JSEvents.deferCall(_JSEvents_requestFullscreen, 1 /* priority over pointer lock */, [target, strategy]);
+        JSEvents.deferCall(JSEvents_requestFullscreen, 1 /* priority over pointer lock */, [target, strategy]);
         return {{{ cDefine('EMSCRIPTEN_RESULT_DEFERRED') }}};
       } else {
         return {{{ cDefine('EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED') }}};
       }
     }
 #endif
 
-    return _JSEvents_requestFullscreen(target, strategy);
+    return JSEvents_requestFullscreen(target, strategy);
   },
 
   emscripten_request_fullscreen__deps: ['$doRequestFullscreen'],
@@ -1612,7 +1612,7 @@ var LibraryHTML5 = {
     return doRequestFullscreen(target, strategy);
   },
 
-  emscripten_enter_soft_fullscreen__deps: ['$JSEvents', '$setLetterbox', '$hideEverythingExceptGivenElement', '$restoreOldWindowedStyle', '$registerRestoreOldStyle', '$restoreHiddenElements', '$currentFullscreenStrategy', '$softFullscreenResizeWebGLRenderTarget', '$getCanvasElementSize', '$setCanvasElementSize', 'JSEvents_resizeCanvasForFullscreen', '$findEventTarget'],
+  emscripten_enter_soft_fullscreen__deps: ['$JSEvents', '$setLetterbox', '$hideEverythingExceptGivenElement', '$restoreOldWindowedStyle', '$registerRestoreOldStyle', '$restoreHiddenElements', '$currentFullscreenStrategy', '$softFullscreenResizeWebGLRenderTarget', '$getCanvasElementSize', '$setCanvasElementSize', '$JSEvents_resizeCanvasForFullscreen', '$findEventTarget'],
   emscripten_enter_soft_fullscreen__proxy: 'sync',
   emscripten_enter_soft_fullscreen__sig: 'iii',
   emscripten_enter_soft_fullscreen: function(target, fullscreenStrategy) {
@@ -1635,7 +1635,7 @@ var LibraryHTML5 = {
         softFullscreen: true
     };
 
-    var restoreOldStyle = _JSEvents_resizeCanvasForFullscreen(target, strategy);
+    var restoreOldStyle = JSEvents_resizeCanvasForFullscreen(target, strategy);
 
     document.documentElement.style.overflow = 'hidden';  // Firefox, Chrome
     document.body.scroll = "no"; // IE11
@@ -1682,14 +1682,14 @@ var LibraryHTML5 = {
     return {{{ cDefine('EMSCRIPTEN_RESULT_SUCCESS') }}};
   },
 
-  emscripten_exit_fullscreen__deps: ['$JSEvents', '$currentFullscreenStrategy', 'JSEvents_requestFullscreen', '$specialHTMLTargets'],
+  emscripten_exit_fullscreen__deps: ['$JSEvents', '$currentFullscreenStrategy', '$JSEvents_requestFullscreen', '$specialHTMLTargets'],
   emscripten_exit_fullscreen__proxy: 'sync',
   emscripten_exit_fullscreen__sig: 'i',
   emscripten_exit_fullscreen: function() {
     if (!JSEvents.fullscreenEnabled()) return {{{ cDefine('EMSCRIPTEN_RESULT_NOT_SUPPORTED') }}};
 #if HTML5_SUPPORT_DEFERRING_USER_SENSITIVE_REQUESTS
     // Make sure no queued up calls will fire after this.
-    JSEvents.removeDeferredCalls(_JSEvents_requestFullscreen);
+    JSEvents.removeDeferredCalls(JSEvents_requestFullscreen);
 #endif
 
     var d = specialHTMLTargets[{{{ cDefine('EMSCRIPTEN_EVENT_TARGET_DOCUMENT') }}}];