What does the Node.js `--nolazy` flag mean?

Question

When I use --nolazy, I can finally debug asynchronously with IntelliJ, as breakpoints stop at the correct place. But I can't find any docs on --nolazy...

What does --nolazy mean?

Answer 1

To let anyone know, if you debug node js (especially remote debug) and use async type coding which you kind of have to as this is the nature of node, you will to run node with the flag of -nolazy

node --nolazy --debug-brk sample1.js 

this will force V8 engine to do full compile of code and thus work properly with IntelliJ and WebStorm so you can properly place breakpoints in the code and not have to use the ;debugger; string which v8 looks for...

hope this helps someone, sure helped me :)

Sean.

Answer 2

As others have said, you can see command line options for v8 with

node --v8-options 

There, you can see a listing for --lazy:

--lazy (use lazy compilation)       type: bool  default: true 

v8 uses a fairly common way to describe booleans - prefix the flag with no to set to false, and use just the flag to set to true. So --nolazy sets the lazy flag to false.

Note: node uses a slightly different convention - there, you use the no- prefix (note the dash) to set bools to false. For example, --no-deprecation is a node flag.