Real Documentation

appendfile(path: string, data: string)

Aliases appendfileasync

Name	Type	Description
`path`	`string`	Path resolved inside the workspace after separator normalization and workspace-boundary checks. Empty paths, paths outside the workspace, invalid filenames, DOS device names, and blocked extensions error.
`data`	`string`	Lua string bytes to append. No newline or other separator is added automatically.

Appends raw Lua string bytes to a workspace file using binary append mode. The file may be created if its parent folder exists.

Call it with 2 parameter(s): path, data. The argument table explains which values are required and which ones only refine the behavior.

It does not return data. Treat the call as an action and handle errors around the call site when needed.

Append bytes explicitly, including your own newline when you want a new line.

local path = "examples/log.txt"

writefile(path, "first entry")
appendfile(path, string.char(10) .. "second entry")

print(readfile(path))