Moving to node_modules folder to make easier to upgrade

trying to move from Bootstrap 3 to Bootstrap 5

node_modules/infinite-scroll/js/button.js

@@ -0,0 +1,81 @@
+// button
+( function( window, factory ) {
+  // universal module definition
+  if ( typeof module == 'object' && module.exports ) {
+    // CommonJS
+    module.exports = factory(
+        window,
+        require('./core'),
+        require('fizzy-ui-utils'),
+    );
+  } else {
+    // browser global
+    factory(
+        window,
+        window.InfiniteScroll,
+        window.fizzyUIUtils,
+    );
+  }
+
+}( window, function factory( window, InfiniteScroll, utils ) {
+
+// -------------------------- InfiniteScrollButton -------------------------- //
+
+class InfiniteScrollButton {
+  constructor( element, infScroll ) {
+    this.element = element;
+    this.infScroll = infScroll;
+    // events
+    this.clickHandler = this.onClick.bind( this );
+    this.element.addEventListener( 'click', this.clickHandler );
+    infScroll.on( 'request', this.disable.bind( this ) );
+    infScroll.on( 'load', this.enable.bind( this ) );
+    infScroll.on( 'error', this.hide.bind( this ) );
+    infScroll.on( 'last', this.hide.bind( this ) );
+  }
+
+  onClick( event ) {
+    event.preventDefault();
+    this.infScroll.loadNextPage();
+  }
+
+  enable() {
+    this.element.removeAttribute('disabled');
+  }
+
+  disable() {
+    this.element.disabled = 'disabled';
+  }
+
+  hide() {
+    this.element.style.display = 'none';
+  }
+
+  destroy() {
+    this.element.removeEventListener( 'click', this.clickHandler );
+  }
+
+}
+
+// -------------------------- InfiniteScroll methods -------------------------- //
+
+// InfiniteScroll.defaults.button = null;
+
+InfiniteScroll.create.button = function() {
+  let buttonElem = utils.getQueryElement( this.options.button );
+  if ( buttonElem ) {
+    this.button = new InfiniteScrollButton( buttonElem, this );
+  }
+};
+
+InfiniteScroll.destroy.button = function() {
+  if ( this.button ) this.button.destroy();
+};
+
+// --------------------------  -------------------------- //
+
+InfiniteScroll.Button = InfiniteScrollButton;
+
+return InfiniteScroll;
+
+} ) );