\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
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\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{camilo.herbert}
\pdfinfo{
  /Title (es6-cheatsheet.pdf)
  /Creator (Cheatography)
  /Author (camilo.herbert)
  /Subject (ES6 Cheatsheet Cheat Sheet)
}

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% the right line height in the tables
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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
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% Font and Colours
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{ES6 Cheatsheet Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{camilo.herbert} via \textcolor{DarkBackground}{\uline{cheatography.com/66323/cs/16561/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}camilo.herbert \\
  \uline{cheatography.com/camilo-herbert} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 3rd August, 2018.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Constants}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} const EULER = 2.7182818284 \newline \textgreater{} EULER = 13 \newline \textgreater{} EULER \newline \textgreater{} 2.7182818284 // Value stays the same \newline  \newline {\bf{Warning! If array or object, the reference is kept}} \newline {\bf{constant. If the constant is a reference to an object,}} \newline {\bf{you can still modify the content, but never change the}} \newline {\bf{variable.}} \newline \textgreater{} const CONSTANTS = {[}{]} \newline \textgreater{} CONSTANTS.push(EULER) \newline \textgreater{} CONSTANTS \newline \textgreater{} {[} 2.7182818284 {]} \newline \textgreater{} CONSTANTS = \{ 'euler': 2.7182818284 \} \newline \textgreater{} CONSTANTS \newline \textgreater{} {[} 2.7182818284 {]}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Object Notation}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// Computed properties \newline \textgreater{} let key = new Date().getTime() \newline \textgreater{} let obj = \{ {[}key{]}: "value" \} \newline \textgreater{} obj \newline \textgreater{} \{ '1459958882881': 'value' \} \newline // Object literals \newline balloon = \{ color, size \}; \newline // Same as \newline balloon = \{ \newline  color: color, \newline  size: size \newline \} \newline  \newline {\bf{// Better method notations}} \newline obj = \{ \newline  foo (a, b) \{ … \}, \newline  bar} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Destructuring Arrays}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} let {[}a, b, c, d{]} = {[}1, 2, 3, 4{]}; \newline \textgreater{} console.log(a); \newline \textgreater{} 1 \newline \textgreater{} b \newline \textgreater{} 2} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Destructuring Objects}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} let luke = \{ occupation: 'jedi', \newline  father: 'anakin' \} \newline \textgreater{} let \{occupation, father\} = luke \newline \textgreater{} console.log(occupation, father) \newline \textgreater{} jedi anakin} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Spread Operator}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// Turn arrays into comma separated \newline // values and more \newline \textgreater{} function logger (...args) \{ \newline  console.log('\%s arguments', \newline  args.length) \newline  \seqsplit{args.forEach(console.log)} \newline  // arg{[}0{]}, arg{[}1{]}, arg{[}2{]} \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{let vs var}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} var average = 5 \newline \textgreater{} var average = (average + 1) / 2 \newline \textgreater{} average \newline \textgreater{} 3 \newline \textgreater{} let value = 'hello world' \newline \textgreater{} let value = 'what is new' \newline // -\textgreater{} throws TypeError: Identifier 'value' has \newline already been declared \newline  \newline {\bf{Be aware of Temporal Dead Zones:}} \newline \textgreater{} console.log(val) // -\textgreater{} 'undefined' \newline \textgreater{} var val = 3 \newline \textgreater{} console.log(val) // -\textgreater{} 3 \newline {\bf{Because it's equivalent to:}} \newline \textgreater{} var val \newline \textgreater{} console.log(val) \newline \textgreater{} val = 3 \newline \textgreater{} console.log(val) \newline {\bf{Variables declared with "let/const" do not get hoisted:}} \newline \textgreater{} console.log(val) \newline // -\textgreater{} Throws ReferenceError \newline \textgreater{} let val = 3 \newline \textgreater{} console.log(val) // -\textgreater{} 3} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Promises}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{new Promise((resolve, reject) =\textgreater{} \{ \newline         request.get(url, (error, response, \newline             body) =\textgreater{} \{ \newline             if (body) \{ \newline                 \seqsplit{resolve(JSON.parse(body));} \newline             \} else \{ \newline                 resolve(\{\}); \newline             \} \newline         \}) \newline     \}).then(() =\textgreater{} \{ ... \newline     \}) \newline     .catch((err) =\textgreater{} \newline         throw err) \newline // Parallelize tasks \newline Promise.all({[} \newline     promise1, promise2, promise3 \newline {]}).then(() =\textgreater{} \{ \newline     // all tasks are finished \newline \})} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Classes, Inheritance, Setters, Getters}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{class Rectangle extends Shape \{ \newline     constructor(id, x, y, w, h) \{ \newline         super(id, x, y) \newline         this.width = w \newline         this.height = h \newline     \} \newline     // Getter and setter \newline     set width(w) \{ \newline         this.\_width = w \newline     \} \newline     get width() \{ \newline         return this.\_width \newline     \} \newline \} \newline class Circle extends Shape \{ \newline     constructor(id, x, y, radius) \{ \newline         super(id, x, y) \newline         this.radius = radius \newline     \} \newline     do\_a(x) \{ \newline         let a = 12; \newline         super.do\_a(x + a); \newline     \} \newline     static do\_b() \{ ... \newline     \} \newline \} \newline Circle.do\_b()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Binary, Octal and Hex Notation}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} 0b1001011101 // 605 \newline \textgreater{} 0o6745 // 3557 \newline \textgreater{} 0x2f50a // 193802} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Arrow Function}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} setTimeout(() =\textgreater{} \{ \newline … console.log('delayed') \newline … \}, 1000)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Equivalent with Anonymous Function}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} setTimeout(function () \{ \newline … console.log('delayed') \newline … \}.bind(this), 1000)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Equivalent with IIFE}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} (function () \{ \newline … var cue = 'Luke, I am your father' \newline … console.log(cue) // 'Luke, I am – \newline … \}()) \newline \textgreater{} console.log(cue) // Reference Error} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{New Scoped Functions}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} \{ \newline … let cue = 'Luke, I am your father' \newline … console.log(cue) \newline … \} \newline \textgreater{} 'Luke, I am your father'} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{String Interpolation, Thanks to Template Literals}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} const name = 'Tiger' \newline \textgreater{} const age = 13 \newline \textgreater{} console.log(`My cat is named \$\{name\} and is \newline \$\{age\} years old.`) \newline \textgreater{} My cat is named Tiger and is 13 years old. \newline // We can preserve newlines… \newline let text = ( `cat \newline dog \newline nickelodeon` \newline )} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Default Params}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textgreater{} function howAreYou (answer = 'ok') \{ \newline  conso} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}