Eaglercraft 188 Resource Packs Work Direct
If you are playing the single-player offline version (the HTML file saved to your computer), you can use the "Extract and Refresh" trick.
Because Eaglercraft stores the world data in your browser's IndexedDB, you cannot simply drag files in. However, recent versions of Eaglercraft (Offline Download v1.8.8) allow you to import a resource pack via the "Settings" menu using file upload.
Installing a resource pack in Eaglercraft is a study in browser-based constraints. Unlike the Java Edition, which allows direct file system access, Eaglercraft operates within a sandboxed web environment. The process is as follows: eaglercraft 188 resource packs work
A frequent confusion is whether the server needs the resource pack. Unlike mods, resource packs are client-side only. The server does not need to have the pack installed.
However, if you join a public Eaglercraft server, that server may force a resource pack on you. This overrides your personal selection. You can disable this in the multiplayer settings: Options > Chat Settings > "Allow Server Resource Packs: Off". If you are playing the single-player offline version
If you turn this off, your manually installed Eaglercraft 1.8.8 resource packs work perfectly, but you might miss "server-specific" textures (like custom paintings).
If you have a favorite pack from a later version, you can convert it yourself. Here is the technical workflow. Warning: You cannot add new blocks (like Copper
Warning: You cannot add new blocks (like Copper or Deepslate). Eaglercraft 1.8.8 does not have those block IDs. The game will simply ignore those texture files.
The user experience for installing packs has improved significantly in the 1.8.8 version.