Moving to node_modules folder to make easier to upgrade

trying to move from Bootstrap 3 to Bootstrap 5

node_modules/min-document/dom-fragment.js

@@ -0,0 +1,28 @@
+var DOMElement = require("./dom-element.js")
+
+module.exports = DocumentFragment
+
+function DocumentFragment(owner) {
+    if (!(this instanceof DocumentFragment)) {
+        return new DocumentFragment()
+    }
+
+    this.childNodes = []
+    this.parentNode = null
+    this.ownerDocument = owner || null
+}
+
+DocumentFragment.prototype.type = "DocumentFragment"
+DocumentFragment.prototype.nodeType = 11
+DocumentFragment.prototype.nodeName = "#document-fragment"
+
+DocumentFragment.prototype.appendChild  = DOMElement.prototype.appendChild
+DocumentFragment.prototype.replaceChild = DOMElement.prototype.replaceChild
+DocumentFragment.prototype.removeChild  = DOMElement.prototype.removeChild
+
+DocumentFragment.prototype.toString =
+    function _DocumentFragment_toString() {
+        return this.childNodes.map(function (node) {
+            return String(node)
+        }).join("")
+    }