This FS doesn’t much look like an FS either—certainly it’s way off what SQLite needs. For mutating a file, you get the options write, seek, and truncate, but th

This FS doesn’t much look like an FS either—certainly it’s way off what SQLite needs. For mutating a file, you get the options write, seek, and truncate, but they don’t do anything until you close the file. It’s essentially equivalent to the write-to-a-temporary-file-and-then-atomic-rename-overwrite pattern. You can implement exactly the same thing on top of an ArrayBuffer that you’ll put in an IndexedDB with no fuss—and if you were doing it that way, then you could even decide whether to go for something like a rope for intermediate editing, or mutating the ArrayBuffer directly, whereas if you use FSA you have no control over which of the two approaches it might use, or something else altogether.