TMS WEB Core is about transpiling Object Pascal code to run this code in the browser.
The browser can be considered the operating system where the code is running, so, anything using the Windows API will not work in the browser. Object Pascal code that is not using anything Windows or VCL specific, can work & run in the browser.
TMS WEB Core comes with its component framework to run in the browser as well as our entire FNC component offerings that were made web-ready