ReferenceError: _ is not defined

[Francefire]

After having some trouble installing underscore (because it's not underscore.js but only underscore), I try to use a underscore function (_.once) but I get this error, I have const Underscore = require("underscore") on the top of my code, but still, and when I try const Underscore = require("underscore.js") it doesn't find the modul, so you could please enlighten me ?

I'm a reall beginner at JavaScript, forgive me if I do something obviously wrong ;p

[Rayraz]

Your code assigns the underscore library to a constant named Underscore.
What I think you want is: const _ = require("underscore"); which will assign the underscore library to a constant named _.

[Francefire]

Omg thanks, since I didn't take any lesson of javascript I wasn't understanding what did this command really means, but now I got it, thanks :D

[olivier-voutat]

Your code assigns the underscore library to a constant named Underscore.
What I think you want is: const _ = require("underscore"); which will assign the underscore library to a constant named _.

Was looking this for hours...

[naveenkumargc]

Your code assigns the underscore library to a constant named Underscore.
What I think you want is: const _ = require("underscore"); which will assign the underscore library to a constant named _.

Thank you. this works when you are working on react application also.

[ErvinRrahmani]

Your code assigns the underscore library to a constant named Underscore.
What I think you want is: const _ = require("underscore"); which will assign the underscore library to a constant named _.

thnx a lot