You can use a tool like Node.js to run an http-server from your computer's terminal, pointing to the Eaglercraft folder.
is a fully functional web-browser port of Minecraft Java Edition 1.7.2 that lets you play the game directly in any modern web browser without downloading or installing any external launchers. By using ahead-of-time (AOT) compilation tools like TeaVM and specialized graphics drivers, developers successfully brought the iconic 2013 "Update That Changed the World" to HTML5 platforms.
Eaglercraft 1.7.2 Full is a complete web-based recreation of the standard Java desktop edition. Unlike simple clones or low-effort 2D web remakes, this version operates on the actual, decompiled source code of Minecraft.