dededededededededededede

extension/fullscreen/extension.json

+{
+  "id": "fullscreen",
+  "version": "1.0.0",
+  "name": "全屏按钮",
+  "author": "DeQxJ00",
+  "description": "里宝牌来一个好吗？秋梨膏！",
+  "preview": "10.png",
+  "entry": "script.js"
+}

extension/fullscreen/script.js

+(function() {
+    'use strict';
+
+    class Majfullscreen{
+        constructor() {
+            this.appendFullscreenButton();
+        }
+        launchFullscreen(element) {
+            if(element.requestFullscreen) {
+                element.requestFullscreen();
+            } else if(element.mozRequestFullScreen) {
+                element.mozRequestFullScreen();
+            } else if(element.msRequestFullscreen){
+                element.msRequestFullscreen();
+            } else if(element.webkitRequestFullscreen) {
+                element.webkitRequestFullScreen();
+            }
+        }
+
+        exitFullscreen() {
+            if (document.exitFullscreen) {
+                document.exitFullscreen();
+            } else if (document.msExitFullscreen) {
+                document.msExitFullscreen();
+            } else if (document.mozCancelFullScreen) {
+                document.mozCancelFullScreen();
+            } else if (document.webkitExitFullscreen) {
+                document.webkitExitFullscreen();
+            }
+        }
+
+        appendFullscreenButton() {
+
+            const b = document.createElement("button");
+            b.innerText = "全屏";
+            b.style.position = "absolute";
+            b.style.bottom = "0px";
+              if(window.helper){
+                     b.style.right = "70px";
+            }else{
+                   b.style.right = "0px";
+            }
+            b.style.zIndex = 1002;
+            b.addEventListener("click", () => {
+                if (document.fullscreenElement) {
+                    this.exitFullscreen();
+                } else {
+                    this.launchFullscreen(document.documentElement);
+                }
+            });
+            document.body.appendChild(b);
+            console.log("全屏按钮添加成功");
+        }
+    }
+
+    window.Majfullscreen = Majfullscreen;
+    window.majfullscreen = new Majfullscreen();
+
+})();
\ No newline at end of file