Used for finding whats going on in your code. Generally these are best kept to developement enviornments and not production.

Equivlent to console.debug() in JavaScript.

Use this to log errors in your program which shold be addressed. If it is an error your program is designed to catch and recover from, you probably don’t need to log it.

On erlang this will always evaluate the message to a string, even if the log isn’t printed. This is because on JavaScript anything can be logged, so this makes more sense as a default as it lets us share one interface accross all targets. If you are on Erlang and want it only evaluated when logged, try [lazy_error] instead.

Equivlent to console.error() in JavaScript. Equivlent to error in Erlang.

General information such as subprocess starts/stops, initalization information, and runtime logs.

Equivlent to console.log() in JavaScript.

Runtime arnings which are of note.

Equivlent to console.warn() in JavaScript.