[devtools-snippet] add logGlobals.js

Author: 0xdevalias

devtools-snippets/logGlobals.js

@@ -0,0 +1,33 @@
+/*
+  log-globals
+  by Sindre Sorhus
+  https://github.com/sindresorhus/log-globals
+  MIT License
+*/
+(function () {
+  'use strict';
+
+  function getIframe() {
+    var el = document.createElement('iframe');
+    el.style.display = 'none';
+    document.body.appendChild(el);
+    var win = el.contentWindow;
+    document.body.removeChild(el);
+    return win;
+  }
+
+  function detectGlobals() {
+    var iframe = getIframe();
+    var ret = Object.create(null);
+
+    for (var prop in window) {
+      if (!(prop in iframe)) {
+        ret[prop] = window[prop];
+      }
+    }
+
+    return Object.keys(ret);
+  }
+
+  console.log(detectGlobals());
+})();