Lua standard libraries

The Lua interpreter (happyview-lua) keeps these Lua 5.4 standard libraries and builtins. JavaScript and TypeScript scripts get their engine’s own built-ins; see Languages.

string

• byte
• char
• find
• format
• gmatch
• gsub
• len
• lower
• match
• rep
• reverse
• sub
• upper

table

• concat
• insert
• remove
• sort

math

• abs
• ceil
• floor
• max
• min
• random
• sqrt
• huge
• pi

os (safe subset)

Only the following safe functions are available from the os module:

• time
• date
• difftime

Every other os function is absent, including os.execute, os.remove, os.rename, os.exit, os.getenv and os.clock.

coroutine

The whole coroutine library.

utf8

The whole utf8 library.

Builtins

• print
• tostring
• tonumber
• type
• pairs
• ipairs
• next
• select
• error
• pcall
• xpcall
• assert
• setmetatable
• getmetatable
• rawget
• rawset
• rawequal

Removed modules

The following standard Lua modules are removed and unavailable in the sandbox:

io, debug, package, dofile, loadfile, load, collectgarbage

Lua’s own require is removed too, but HappyView installs its own in its place: it loads installed library plugins and the internal.* built-ins — see Built-in Modules.