Further development of front-end technologies makes client-side web mapping applications a promising way of providing (interactive explorable) geodata to the global community. Which libraries address this topic and how the implementation of essential web GIS functionalities can be done using LeafLet, MapLibre or OpenLayers are questions analysed in this document. Therefore, internet research has been done collecting already existing solutions making use of the respective functionalities of the libraries. As a result, links to implementation examples, plugins or references in the API documentations have been gathered in a functionality matrix. The information gained by this research is used for developing and implementing an interactive web mapping application as part of the World Heat Flow Database Project. Beside this, the document offers an overview for people who are new to this topic, provides code examples for common web GIS features and makes the readers familiar with topic-specific vocabulary and terms.