diff --git a/example/tests/gm_menu_test.js b/example/tests/gm_menu_test.js
new file mode 100644
index 000000000..216015dfb
--- /dev/null
+++ b/example/tests/gm_menu_test.js
@@ -0,0 +1,225 @@
+// ==UserScript==
+// @name         GM_registerMenuCommand Example
+// @namespace    http://tampermonkey.net/
+// @version      1.0
+// @description  Simple demo for GM_registerMenuCommand
+// @match        *://*/*
+// @grant        GM_registerMenuCommand
+// @grant        GM_unregisterMenuCommand
+// ==/UserScript==
+
+(async function () {
+  'use strict';
+
+  const checkSubFrameIdSequence = false;
+
+  const intervalChanging = false;
+
+  const skipClickCheck = false;
+
+  let myResolve = () => { };
+  const waitNext = async () => {
+    await new Promise((resolve) => {
+      myResolve = () => { setTimeout(resolve, 50) };
+    });
+  };
+
+  const waitActions = async (...messages) => {
+    if (skipClickCheck) return;
+    messages = messages.flat();
+    for (const message of messages) {
+      console.log(message);
+      await waitNext();
+    }
+  };
+
+  const isInSubFrame = () => {
+
+    try {
+      return window.top !== window;
+    } catch {
+      return true;
+    }
+  }
+
+  if (intervalChanging) {
+    // TM: 在打开菜单时，显示会不断改变
+    let i = 1000;
+    let p = 0;
+    setInterval(() => {
+      if (p) GM_unregisterMenuCommand(p);
+      i++;
+      GM_registerMenuCommand(`interval-m-${i}`, () => { console.log(`${i}`); }, {id: "m"});
+      p = GM_registerMenuCommand(`interval-n-${i}`, () => { console.log(`${i}`); });
+    }, 1000);
+    // return;
+  }
+  if (checkSubFrameIdSequence) {
+    const key = Math.floor(Math.random() * 99999 + 99999).toString();
+
+    let arr = [];
+    arr.push(
+      GM_registerMenuCommand("test", () => { console.log(`${key}-1`); }),
+      GM_registerMenuCommand("test", () => { console.log(`${key}-2`); }),
+      GM_registerMenuCommand("test", () => { console.log(`${key}-3`); })
+    );
+    if (isInSubFrame()) {
+      arr.push(GM_registerMenuCommand("test-sub", () => { console.log(`${key}-sub`); }));
+    } else {
+      arr.push(GM_registerMenuCommand("test-main", () => { console.log(`${key}-main`); }));
+    }
+    arr.push(GM_registerMenuCommand(`test-${location.origin}`, () => { console.log(`${key}-origin`); }));
+    console.log(`checkSubFrameIdSequence (key=${key}, frame=${isInSubFrame()})`, arr.join("..."));
+    // return;
+  }
+
+  let obj1 = { id: "abc" };
+
+  const r01 = GM_registerMenuCommand("MenuReg abc-1", () => {
+
+    console.log("abc-1");
+    myResolve();
+  }, obj1);
+
+  const r02 = GM_registerMenuCommand("MenuReg abc-2", () => {
+
+    console.log("abc-2");
+    myResolve();
+  }, obj1);
+
+  console.log("abc-1 id === abc", r01 === "abc");
+  console.log("abc-2 id === abc", r02 === "abc");
+
+  // there shall be only "MenuReg abc-2" in the menu.
+  await waitActions("There shall be only 'MenuReg abc-2'. Click it to continue.");
+
+  GM_registerMenuCommand("MenuReg abc-1", () => {
+
+    console.log("abc-1.abd");
+    myResolve();
+  }, { id: "abd" });
+
+  GM_registerMenuCommand("MenuReg abc-2", () => {
+
+    console.log("abc-2.abe");
+    myResolve();
+  }, { id: "abe" });
+
+
+  // there shall be only "MenuReg abc-1" and "MenuReg abc-2" in the menu.
+  await waitActions("There shall be 'MenuReg abc-2' and 'MenuReg abc-1'. Click either them to continue.");
+
+
+  GM_registerMenuCommand("MenuReg abc-2", () => {
+
+    console.log("abc-2.abf");
+    myResolve();
+  }, { id: "abf", accessKey: "h" });
+
+  // there shall be only "MenuReg abc-1" and "MenuReg abc-2" in the menu.
+  await waitActions("There shall be 'MenuReg abc-2', 'MenuReg abc-1' and 'MenuReg abc-2 (H)'. Click either them to continue.");
+
+  GM_unregisterMenuCommand("abc");
+  GM_unregisterMenuCommand("abd");
+  GM_unregisterMenuCommand("abe");
+  GM_unregisterMenuCommand("abf");
+
+
+
+  const p10 = GM_registerMenuCommand("MenuReg D-23", () => {
+
+    console.log(110);
+    myResolve();
+  }, "b");
+
+
+  const p20 = GM_registerMenuCommand("MenuReg D-23", () => {
+
+    console.log(120);
+    myResolve();
+  }, "b");
+
+  console.log("p10 === 1", p10 === 1);
+  console.log("p20 === 2", p20 === 2);
+
+  // MenuReg D-23 clicking shall give both 110 and 120
+  await waitActions("Click [MenuReg D-23] -> 110, 120");
+
+
+  const p30 = GM_registerMenuCommand("MenuReg D-26", () => {
+
+    console.log(130);
+    myResolve();
+  }, { id: "2" });
+  console.log("p30 === '2'", p30 === "2");
+
+  // MenuReg D-23 clicking shall give 110
+  // MenuReg D-26 clicking shall give 130
+
+  await waitActions("Click [MenuReg D-23] -> 110", "Click [MenuReg D-26] -> 130");
+
+
+  const p32 = GM_registerMenuCommand("MenuReg D-26", () => {
+
+    console.log(210);
+    myResolve();
+  }, { id: 2 });
+  console.log("p32 === 2", p32 === 2);
+
+  // MenuReg D-23 clicking shall give 110
+  // MenuReg D-26 clicking shall give 210
+
+  await waitActions("Click [MenuReg D-23] -> 110", "Click [MenuReg D-26] -> 210");
+
+
+  const p33 = GM_registerMenuCommand("MenuReg D-26", () => {
+
+    console.log(220);
+    myResolve();
+  }, { id: 3 });
+  console.log("p33 === 3", p33 === 3);
+
+  // MenuReg D-23 clicking shall give 110
+  // MenuReg D-26 clicking shall give 210 220
+
+  await waitActions("Click [MenuReg D-23] -> 110", "Click [MenuReg D-26] -> 210, 220");
+
+
+
+  const p34 = GM_registerMenuCommand("MenuReg D-26", () => {
+
+    console.log(230);
+    myResolve();
+  }, { id: "4" });
+  console.log("p34 === '4'", p34 === "4");
+
+  // MenuReg D-23 clicking shall give 110
+  // MenuReg D-26 clicking shall give 210 220 230
+  await waitActions("Click [MenuReg D-23] -> 110", "Click [MenuReg D-26] -> 210, 220, 230");
+
+  GM_unregisterMenuCommand("4");
+
+
+  // MenuReg D-23 clicking shall give 110
+  // MenuReg D-26 clicking shall give 210 220
+  await waitActions("Click [MenuReg D-23] -> 110", "Click [MenuReg D-26] -> 210, 220");
+
+
+
+  const p40 = GM_registerMenuCommand("MenuReg D-40", () => {
+
+    console.log(601);
+  });
+
+  const p50 = GM_registerMenuCommand("MenuReg D-50", () => {
+
+    console.log(602);
+  });
+  console.log("p40, p50", [p40, p50]); // TM gives 3&4
+
+
+
+})().finally(() => {
+  console.log("finish");
+});
+