Re: Can you save a online library in the spiffs so you can a

On an ESP8266... Certainly!
You can write you're own server, set up a file system, copy files to it and have the server, serve them to your browser.
... or you can use a library (like mine) that can do all that logistics for you. Mine does it with three lines of code in you Sketch... then drag and drop your JS files (and other browser mark-up) onto the server created.
You can write you're own server, set up a file system, copy files to it and have the server, serve them to your browser.
... or you can use a library (like mine) that can do all that logistics for you. Mine does it with three lines of code in you Sketch... then drag and drop your JS files (and other browser mark-up) onto the server created.