diff --git a/ghu.js b/ghu.js
index 994e2156..9bef5e0a 100644
--- a/ghu.js
+++ b/ghu.js
@@ -69,7 +69,7 @@ ghu.task('build:scripts', runtime => {
     return read(`${SRC}/_h5ai/public/js/scripts.js`)
         .then(newerThan(mapper, `${SRC}/_h5ai/public/js/**`))
         .then(webpack(webpackConfig, {showStats: true}))
-        .then(wrap('\n\n// @include "vendor/*"\n\n'))
+        .then(wrap('\n\n// @include "global.js"\n\n'))
         .then(includeit())
         .then(ife(() => runtime.args.production, uglify()))
         .then(wrap(runtime.commentJs))
diff --git a/src/_h5ai/private/php/pages/page.tpl.jade b/src/_h5ai/private/php/pages/page.tpl.jade
index a42951af..9a7526b1 100644
--- a/src/_h5ai/private/php/pages/page.tpl.jade
+++ b/src/_h5ai/private/php/pages/page.tpl.jade
@@ -5,7 +5,6 @@ doctype html
 html(class='no-js', lang='en')
 
     head
-        <!--[if lt IE 10]><meta id='no-browser'><![endif]-->
         meta(charset='utf-8')
         meta(http-equiv='x-ua-compatible', content='ie=edge')
         title #{title}
diff --git a/src/_h5ai/public/js/global.js b/src/_h5ai/public/js/global.js
new file mode 100644
index 00000000..020b63b5
--- /dev/null
+++ b/src/_h5ai/public/js/global.js
@@ -0,0 +1,45 @@
+(function check(win) {
+    /* eslint-disable func-names,no-console,no-var */
+
+    if (typeof win !== 'object' || win.window !== win || !win.document) {
+        throw new Error('no-window');
+    }
+
+    var noBrowser = 'no-browser';
+    var docEl = win.document.documentElement;
+    docEl.className = '';
+
+    function assert(msg, expr) {
+        if (!expr) {
+            docEl.className = noBrowser;
+            throw new Error(noBrowser + ': ' + msg);
+        }
+        win.console.log('checked: ' + msg);
+    }
+
+    assert('console', win.console && typeof win.console.log === 'function');
+    assert('assign', win.Object && typeof win.Object.assign === 'function');
+    assert('promise', win.Promise && typeof win.Promise === 'function');
+    assert('history', win.history && typeof win.history.pushState === 'function');
+
+    assert('canvas', (function () {
+        var elem = win.document.createElement('canvas');
+        return elem.getContext && elem.getContext('2d');
+    }()));
+
+    assert('storage', (function () {
+        var key = '#test#';
+        try {
+            win.localStorage.setItem(key, key);
+            win.localStorage.removeItem(key);
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }()));
+
+    /* eslint-enable no-var */
+}(this));
+
+
+// @include "vendor/*.js"
diff --git a/src/_h5ai/public/js/lib/core/modernizr.js b/src/_h5ai/public/js/lib/core/modernizr.js
index abbc14b2..1ce99cdd 100644
--- a/src/_h5ai/public/js/lib/core/modernizr.js
+++ b/src/_h5ai/public/js/lib/core/modernizr.js
@@ -1,25 +1,5 @@
-const win = require('../win');
-
-const hasCanvas = (() => {
-    const elem = win.document.createElement('canvas');
-    return !!(elem.getContext && elem.getContext('2d'));
-})();
-
-const hasHistory = !!(win.history && win.history.pushState);
-
-const hasLocalStorage = (() => {
-    const key = '#test#';
-    try {
-        win.localStorage.setItem(key, key);
-        win.localStorage.removeItem(key);
-        return true;
-    } catch (e) {
-        return false;
-    }
-})();
-
 module.exports = {
-    canvas: hasCanvas,
-    history: hasHistory,
-    localstorage: hasLocalStorage
+    canvas: true,
+    history: true,
+    localstorage: true
 };
diff --git a/src/_h5ai/public/js/lib/win.js b/src/_h5ai/public/js/lib/win.js
index e6798665..c131bc06 100644
--- a/src/_h5ai/public/js/lib/win.js
+++ b/src/_h5ai/public/js/lib/win.js
@@ -1,23 +1,5 @@
-const win = window; // eslint-disable-line no-undef
+const win = module.exports = global.window;
 
 if (typeof win !== 'object' || win.window !== win || !win.document) {
     throw new Error('no-window');
 }
-
-const noBrowser = 'no-browser';
-const doc = win.document;
-const docEl = doc.documentElement;
-docEl.className = '';
-
-function assert(expr, hint) {
-    if (!expr) {
-        docEl.className = noBrowser;
-        throw new Error(`${noBrowser}: ${hint}`);
-    }
-}
-
-assert(!doc.getElementById(noBrowser), 'ie<10');
-assert(typeof Object.assign === 'function', 'assign');
-assert(typeof Promise === 'function', 'promise');
-
-module.exports = win;