Debug.md

May 18, 2018 · View on GitHub

Module Elm.Debug

This library is for investigating bugs or performance problems.

log :: forall a. String -> a -> a

Log a tagged value on the developer console, and then return the value.

1 + log "number" 1        -- equals 2, logs "number: 1"
length (log "start" [])   -- equals 0, logs "start: []"

Notice that log is not a pure function! It should only be used for investigating bugs or performance problems.

crash :: forall a. String -> a

Crash the program with an error message.

Equivalent to Purescript's Partial.Unsafe.unsafeCrashWith