javascript - NodeJS - convert relative path to absolute -

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in file-system working directory here:

c:\temp\a\b\c\d

and under b\bb there's file: tmp.txt

c:\temp\a\b\bb\tmp.txt

if want go file working directory, i'll use path:

"../../bb/tmp.txt"

in case file not exist want log full path , tell user:
"the file c:\temp\a\b\bb\tmp.txt not exist".

my question:

i need function convert relative path: "../../bb/tmp.txt" absolute: "c:\temp\a\b\bb\tmp.txt"

in code should this: 

console.log("the file" + converttoabs("../../bb/tmp.txt") + " not exist")

use path.resolve

try:

resolve = require('path').resolve resolve('../../bb/tmp.txt')

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