How to check if a path is absolute or relative
Since node version 0.12.0 you can use the path.isAbsolute(path) function from the path module.
i.e:
var path = require('path');if(path.isAbsolute(myPath)) { //...}
You could use
path.resolve(yourPath)===yourPathIf your path isn't normalized, use
path.resolve( yourPath ) == path.normalize( yourPath )
As commented to dystroy's answer, the proposed solutions don't work if an absolute path is not already normalized (for example the path: ///a//..//b//./).
A correct solution is:
path.resolve(yourPath) === path.normalize(yourPath)As Marc Diethelm suggests in the comments, this has still some issues, since path.resolve removes trailing slashes while path.normalize doesn't.
I'm not sure how these function exactly behave (as you can read in the comments), anyway the following snippet seem to work fine at least in Linux environments:
path.resolve(yourPath) === path.normalize(yourPath).replace( RegExp(path.sep+'$'), '' );