Get off off rails-assets

Just moving the things we currently use (and should drop in the ASAP) to vendor/assets

vendor/assets/javascripts/holderjs/src/lib/dom.js

@@ -0,0 +1,62 @@
+/**
+ * Generic new DOM element function
+ *
+ * @param tag Tag to create
+ * @param namespace Optional namespace value
+ */
+exports.newEl = function(tag, namespace) {
+    if (!global.document) return;
+
+    if (namespace == null) {
+        return global.document.createElement(tag);
+    } else {
+        return global.document.createElementNS(namespace, tag);
+    }
+};
+
+/**
+ * Generic setAttribute function
+ *
+ * @param el Reference to DOM element
+ * @param attrs Object with attribute keys and values
+ */
+exports.setAttr = function (el, attrs) {
+    for (var a in attrs) {
+        el.setAttribute(a, attrs[a]);
+    }
+};
+
+/**
+ * Creates a XML document
+ * @private
+ */
+exports.createXML = function() {
+    if (!global.DOMParser) return;
+    return new DOMParser().parseFromString('<xml />', 'application/xml');
+};
+
+/**
+ * Converts a value into an array of DOM nodes
+ *
+ * @param val A string, a NodeList, a Node, or an HTMLCollection
+ */
+exports.getNodeArray = function(val) {
+    var retval = null;
+    if (typeof(val) == 'string') {
+        retval = document.querySelectorAll(val);
+    } else if (global.NodeList && val instanceof global.NodeList) {
+        retval = val;
+    } else if (global.Node && val instanceof global.Node) {
+        retval = [val];
+    } else if (global.HTMLCollection && val instanceof global.HTMLCollection) {
+        retval = val;
+    } else if (val instanceof Array) {
+        retval = val;
+    } else if (val === null) {
+        retval = [];
+    }
+
+    retval = Array.prototype.slice.call(retval);
+
+    return retval;
+};