fixes #24

Asset/AssetManager.js

@@ -38,7 +38,7 @@
     jsOMS.Asset.AssetManager.prototype.registerLoadedAssets = function ()
     {
         const scripts = document.getElementsByTagName('script'),
-            length  = scripts.length;
+            length = !scripts ? 0 : scripts.length;
 
         for (let i = 0; i < length; i++) {
             this.assets[jsOMS.hash(scripts[i].src)] = scripts[i].src;
@@ -72,7 +72,11 @@
                 fileref.setAttribute('src', path);
 
                 if (typeof fileref !== 'undefined') {
-                    document.getElementsByTagName('head')[0].appendChild(fileref);
+                    const head = document.getElementsByTagName('head');
+
+                    if(head) {
+                        head[0].appendChild(fileref);
+                    }
                 }
 
                 this.assets[hash] = path;
@@ -83,7 +87,11 @@
                 fileref.setAttribute('href', path);
 
                 if (typeof fileref !== 'undefined') {
-                    document.getElementsByTagName('head')[0].appendChild(fileref);
+                    const head = document.getElementsByTagName('head');
+
+                    if(head) {
+                        head[0].appendChild(fileref);
+                    }
                 }
 
                 this.assets[hash] = path;

Autoloader.js

@@ -54,7 +54,7 @@
     jsOMS.Autoloader.initPreloaded = function ()
     {
         const scripts = document.getElementsByTagName('script'),
-            length  = scripts.length;
+            length  = !scripts ? 0 : scripts.length;
 
         for (let i = 0; i < length; i++) {
             /** global: URL */

UI/DragNDrop.js

@@ -52,7 +52,7 @@
             this.bindElement(id);
         } else {
             const elements = document.querySelectorAll('[draggable]'),
-                length = elements.length;
+                length = !elements ? 0 : elements.length;
 
             for (var i = 0; i < length; i++) {
                 if (typeof elements[i].getAttribute('id') !== 'undefined' && elements[i].getAttribute('id') !== null) {
@@ -75,6 +75,10 @@
         const element = document.getElementById(id);
         console.log(id);
 
+        if(!element) {
+            return;
+        }
+
         element.addEventListener('dragstart', function(event) {
             // todo: 
             console.log('drag start');

UI/Element/Input.js

@@ -57,7 +57,7 @@
         {
             /* Handle remote datalist/autocomplete input element */
             let listId, list;
-            if (typeof (listId = this.getAttribute('list')) !== 'undefined' && (list = document.getElementById(listId)).getAttribute('data-list-src') !== 'undefined') {
+            if (typeof (listId = this.getAttribute('list')) !== 'undefined' && (list = document.getElementById(listId)) && list.getAttribute('data-list-src') !== 'undefined') {
                 self.addRemoteDatalistOptions(this, list);
             }
 
@@ -72,6 +72,10 @@
             if (typeof (ref = this.getAttribute('data-ref')) !== 'undefined') {
                 let e = document.getElementById(ref);
 
+                if(!e) {
+                    return;
+                }
+
                 switch (e.tagName) {
                     case 'ul':
                         break;
@@ -85,7 +89,11 @@
         if (typeof (dataButton = input.getAttribute('data-button')) !== 'undefined') {
             this.app.inputManager.getKeyboardManager().bind(input, 13, function ()
             {
-                document.getElementById(dataButton).click();
+                const db = document.getElementById(dataButton);
+
+                if(db) {
+                    db.click();
+                }
             });
         }
     };

UI/FormManager.js

@@ -80,7 +80,7 @@
             this.bindForm(id);
         } else {
             const forms  = document.getElementsByTagName('form'),
-                length = forms.length;
+                length = !forms ? 0 : forms.length;
 
             for (var i = 0; i < length; i++) {
                 if (typeof forms[i].getAttribute('id') !== 'undefined' && forms[i].getAttribute('id') !== null && typeof this.ignore[forms[i].getAttribute('id')] === 'undefined') {

UI/Input.js

@@ -63,6 +63,10 @@
             if (typeof (ref = this.getAttribute('data-ref')) !== 'undefined') {
                 let e = document.getElementById(ref);
 
+                if(!e) {
+                    return;
+                }
+
                 switch (e.tagName) {
                     case 'ul':
                         break;
@@ -76,7 +80,11 @@
         if (typeof (dataButton = input.getAttribute('data-button')) !== 'undefined') {
             this.app.inputManager.getKeyboardManager().bind(input, 13, function ()
             {
-                document.getElementById(dataButton).click();
+                const db = document.getElementById(dataButton);
+
+                if(db) { 
+                    db.click();
+                }
             });
         }
     };

UI/Input/Mouse/MouseManager.js

@@ -62,7 +62,7 @@
         const self = this,
             e    = document.getElementById(element);
 
-        if (e === null) {
+        if (!e) {
             return;
         }
 

UI/Input/Touch/TouchManager.js

@@ -55,6 +55,10 @@
         const e    = document.getElementById(surface),
             self = this;
 
+        if(!e) {
+            return;
+        }
+
         e.addEventListener('touchstart', function (event)
         {
             const touch = this.changedTouches[0];

UI/TabManager.js

@@ -37,11 +37,16 @@
     jsOMS.UI.TabManager.prototype.bind = function (id)
     {
         if (typeof id !== 'undefined') {
-            this.bindElement(document.getElementById(id));
+            const e = document.getElementById(id);
-        } else {
-            var tabs = document.querySelectorAll('.tabview');
 
-            for (var i = 0; i < tabs.length; i++) {
+            if(e) {
+                this.bindElement();
+            }
+        } else {
+            var tabs = document.querySelectorAll('.tabview'),
+                length = !tabs ? 0 : tabs.length;
+
+            for (var i = 0; i < length; i++) {
                 this.bindElement(tabs[i]);
             }
         }

UI/TableManager.js

@@ -37,11 +37,16 @@
     jsOMS.UI.TableManager.prototype.bind = function (id)
     {
         if (typeof id !== 'undefined') {
-            this.bindElement(document.getElementById(id));
+            const e = document.getElementById(id);
-        } else {
-            const tables = document.querySelectorAll('.tables');
 
-            for (var i = 0; i < tables.length; i++) {
+            if(e) {
+                this.bindElement(e);
+            }
+        } else {
+            const tables = document.querySelectorAll('.tables'),
+                length = !tables ? 0 : tables.length;
+
+            for (var i = 0; i < length; i++) {
                 this.bindElement(tables[i]);
             }
         }

UI/UIManager.js

@@ -53,6 +53,10 @@
         } else {
             const tag = document.getElementById(id);
 
+            if(!tag) {
+                return;
+            }
+
             switch (tag.tagName) {
                 case 'form':
                     this.formManager.bind(id);

Uri/UriFactory.js

@@ -190,7 +190,13 @@
                 } else if (typeof jsOMS.Uri.UriFactory.uri[match] !== 'undefined') {
                     return jsOMS.Uri.UriFactory.uri[match];
                 } else if (match.indexOf('#') === 0) {
-                    return document.getElementById(match.substr(1)).value;
+                    const e = document.getElementById(match.substr(1));
+
+                    if(e) {
+                        return e.value;
+                    }
+
+                    return '';
                 } else if (match.indexOf('?') === 0) {
                     return jsOMS.Uri.Http.getUriQueryParameter(current.query, match.substr(1));
                 } else if (match.indexOf('/') === 0) {

Views/FormView.js

@@ -81,7 +81,13 @@
      */
     jsOMS.Views.FormView.prototype.getSubmit = function ()
     {
-        return document.getElementById(this.id).querySelectorAll('input[type=submit]');
+        const e = document.getElementById(this.id);
+
+        if(!e) {
+            return null;
+        }
+
+        return e.querySelectorAll('input[type=submit]');
     };
 
     /**
@@ -133,8 +139,13 @@
      */
     jsOMS.Views.FormView.prototype.getFormElements = function ()
     {
-        const form      = document.getElementById(this.id),
+        const form = document.getElementById(this.id)
-            selects   = form.getElementsByTagName('select'),
+
+        if(!form) {
+            return [];
+        }
+
+        const selects   = form.getElementsByTagName('select'),
             textareas = form.getElementsByTagName('textarea'),
             inputs    = form.getElementsByTagName('input'),
             external  = document.querySelectorAll('[form=' + this.id + ']');
@@ -235,13 +246,13 @@
     {
         let id = e.getAttribute('name');
 
-        if (id === null) {
+        if (!id) {
             id = e.getAttribute('id');
         } else {
             return id;
         }
 
-        if (id === null) {
+        if (!id) {
             id = e.getAttribute('type');
         } else {
             return id;
@@ -273,8 +284,14 @@
     {
         this.clean();
 
-        this.method = document.getElementById(this.id).attributes['method'].value;
+        const e = document.getElementById(this.id);
-        this.action = document.getElementById(this.id).action;
+
+        if(!e) {
+            return;
+        }
+
+        this.method = e.attributes['method'].value;
+        this.action = e.action;
 
         const elements = this.getFormElements(),
             length   = elements.length;