Merge pull request #322 from SiriusXT/master

fix: Make the fullscreen button exit fullscreen when fullscreen

Author: SSShooter

src/plugin/toolBar.ts

@@ -25,7 +25,11 @@ function createToolBarRBContainer(mind: MindElixirInstance) {
   // toolBarRBContainer.appendChild(percentage)
   toolBarRBContainer.className = 'mind-elixir-toolbar rb'
   fc.onclick = () => {
-    mind.el.requestFullscreen()
+    if (document.fullscreenElement === mind.el) {
+      document.exitFullscreen()
+    } else {
+      mind.el.requestFullscreen()
+    }
   }
   gc.onclick = () => {
     mind.toCenter()