Why piping into node not showing output when there is no console.log?

Question

This is the Linux bash terminal:

$ node 
> 'aBc'.toLowerCase()
'abc'
> .exit
$ echo "console.log('aBc'.toLowerCase()) " | node
abc
$ echo "'aBc'.toLowerCase()" | node

You can see when I type in Node REPL 'aBc'.toLowerCase() I get the output. But when I execute echo "'aBc'.toLowerCase()" | node I don't get any output. Why?

There is a way to get the output without console.log? Maybe is it goes to other ouptput stream?

Answer 1

Found an solution on Reddit by sn-x user 09f911029d7 users.

node no showing normal statments output when non running in interactive mode. To see the output there are 2 options:

node -i "5+5"

This will force node to run as in interactive mode, and will show the output.

The other way is to use:

node -p "5+5"

This will tell node to print the executed last value of the statment. (same result as before).