Moving to node_modules folder to make easier to upgrade

trying to move from Bootstrap 3 to Bootstrap 5

node_modules/infinite-scroll/js/scroll-watch.js

@@ -0,0 +1,97 @@
+// scroll-watch
+( 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 ) {
+
+let proto = InfiniteScroll.prototype;
+
+// default options
+Object.assign( InfiniteScroll.defaults, {
+  scrollThreshold: 400,
+  // elementScroll: null,
+} );
+
+InfiniteScroll.create.scrollWatch = function() {
+  // events
+  this.pageScrollHandler = this.onPageScroll.bind( this );
+  this.resizeHandler = this.onResize.bind( this );
+
+  let scrollThreshold = this.options.scrollThreshold;
+  let isEnable = scrollThreshold || scrollThreshold === 0;
+  if ( isEnable ) this.enableScrollWatch();
+};
+
+InfiniteScroll.destroy.scrollWatch = function() {
+  this.disableScrollWatch();
+};
+
+proto.enableScrollWatch = function() {
+  if ( this.isScrollWatching ) return;
+
+  this.isScrollWatching = true;
+  this.updateMeasurements();
+  this.updateScroller();
+  // TODO disable after error?
+  this.on( 'last', this.disableScrollWatch );
+  this.bindScrollWatchEvents( true );
+};
+
+proto.disableScrollWatch = function() {
+  if ( !this.isScrollWatching ) return;
+
+  this.bindScrollWatchEvents( false );
+  delete this.isScrollWatching;
+};
+
+proto.bindScrollWatchEvents = function( isBind ) {
+  let addRemove = isBind ? 'addEventListener' : 'removeEventListener';
+  this.scroller[ addRemove ]( 'scroll', this.pageScrollHandler );
+  window[ addRemove ]( 'resize', this.resizeHandler );
+};
+
+proto.onPageScroll = InfiniteScroll.throttle( function() {
+  let distance = this.getBottomDistance();
+  if ( distance <= this.options.scrollThreshold ) {
+    this.dispatchEvent('scrollThreshold');
+  }
+} );
+
+proto.getBottomDistance = function() {
+  let bottom, scrollY;
+  if ( this.options.elementScroll ) {
+    bottom = this.scroller.scrollHeight;
+    scrollY = this.scroller.scrollTop + this.scroller.clientHeight;
+  } else {
+    bottom = this.top + this.element.clientHeight;
+    scrollY = window.scrollY + this.windowHeight;
+  }
+  return bottom - scrollY;
+};
+
+proto.onResize = function() {
+  this.updateMeasurements();
+};
+
+utils.debounceMethod( InfiniteScroll, 'onResize', 150 );
+
+// --------------------------  -------------------------- //
+
+return InfiniteScroll;
+
+} ) );