Simple LaTeX template to print beautiful black&white Javascript source code

code-print.tex

\documentclass[a4paper, 12pt]{article}
\usepackage[letterpaper, margin=2cm]{geometry}

\usepackage[T1]{fontenc}
\usepackage{beramono}
\usepackage{listings}
\usepackage{xcolor}

\newcommand\realnumberstyle[1]{}

\makeatletter
\makeatother

\lstset{
    aboveskip=0cm,
    stringstyle=\ttfamily,
    showstringspaces = false,
    basicstyle=\scriptsize\ttfamily,
    commentstyle=\color{gray!45},
    keywordstyle=\bfseries,
    ndkeywordstyle=\bfseries,
    identifierstyle=\ttfamily,
    numbers=left,
    numbersep=15pt,
    numberstyle=\tiny,
    numberfirstline = false,
    breaklines=true
}

\lstdefinelanguage{JavaScript}{
  keywords={typeof, new, true, false, catch, function, return, null, catch, switch, var, const, let, async, await, if, in, while, do, else, case, break, from},
  ndkeywords={class, export, boolean, throw, implements, import, this},
  sensitive=false,
  comment=[l]{//},
  morecomment=[s]{/*}{*/},
  morestring=[b]',
  morestring=[b]"
}

\begin{document}
\begin{lstlisting}[language=JavaScript,numbers=left]

Paste your code here

\end{lstlisting}
\end{document}