You can use the JQuery Endless Scroll plugin to load new rows into an HTML table or list. It used to be available in the JQuery Widget Box on Smalltalkhub here:
http://smalltalkhub.com/#!/~Seaside/JQueryWidgetBoxBut its not part of the configuration so you'll have to load the base packages and then the Smalltalk code. And includes the plugin file from
https://github.com/fredwu/jQuery-Endless-ScrollAnd it might not even then work as I haven't used it in >5 years. But it used to work and things probably haven't changed that much.