It sounds like you're looking for a related to Eaglercraft 1.8.8 Repack — likely the version that runs Minecraft 1.8.8 in a web browser via JavaScript/WebGL.
Eaglercraft 188 is a community-driven repack of classic Minecraft Classic (v0.0.23a_05) content, adapted to run in modern browsers via WebAssembly and JavaScript. This paper summarizes its origin, technical architecture, legal considerations, features of the “188 repack,” and implications for preservation, modding, and browser-based game emulation. eaglercraft 188 repack
Because it runs in your browser, the repack leaves no registry entries on your computer. IT administrators at schools often block standard game executables, but they cannot easily block a simple HTML file. This makes the a favorite among students (use responsibly). Eaglercraft 188 Repack Because it runs in your