\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
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\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{oren01}
\pdfinfo{
  /Title (javascript-basic.pdf)
  /Creator (Cheatography)
  /Author (oren01)
  /Subject (Javascript Basic Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{A3A3A3}
\definecolor{LightBackground}{HTML}{F3F3F3}
\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{Javascript Basic Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{oren01} via \textcolor{DarkBackground}{\uline{cheatography.com/66287/cs/16539/}}}
\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}oren01 \\
  \uline{cheatography.com/oren01} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 5th December, 2021.\\
   Updated 29th December, 2019.\\
   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*}{2}

\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Console}}  \tn
% Row 0
\SetRowColor{LightBackground}
Print to console & `console.log(...)` \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.76 cm} x{6.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Comments}}  \tn
% Row 0
\SetRowColor{LightBackground}
One line & `// single line comment` \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Multi lines & `/* \{\{nl\}\}A multi line comment \{\{nl\}\}*/` \tn 
% Row Count 3 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.56 cm} x{5.44 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Data Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
`number` & 3, 3.1, -3.1, 3e5, 3e-5 \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`string` & "abc", 'abc', "", '' \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`boolean` & true, false \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`undefined` & No value \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
`null` & Value of nothing \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
`NaN` & Not a number \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Numbers}}  \tn
% Row 0
\SetRowColor{LightBackground}
`var x = 3.1415;` & Declare a number \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`x.toFixed(2)` & To string, fixed decimals \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
`parseInt("2")` & Convert a string to int \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{`parseFloat("1.23")`} & Convert a string to float \tn 
% Row Count 7 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Strings}}  \tn
% Row 0
\SetRowColor{LightBackground}
`var s = "Hello"` & Declare and assign a string \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`s.length` & Length of string \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`s.charAt(0)` & Access a character at index \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{`s.indexOf("el")`} & Index of a substring \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`s.slice(2, 4)` & Part of string (start, end) \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Arithmetic Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
`+, -, *, /` & Add, subtract, multiply, divide \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`\%` & Modulus (reminder) \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`=` & Assignment \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
`++, -{}-` & Increment, decrement \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
`+=, -=, *=, /=, \%=` & Operation and assignment \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
`?` & `a = (x \textgreater{} y)?  b: c;` \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.2 cm} x{4.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Comparisons}}  \tn
% Row 0
\SetRowColor{LightBackground}
`==, !=` & Equal to, not equal \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`===, !==` & with type \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`\textgreater{}, \textless{}, \textgreater{}=, \textless{}=` & Greater/Less or equal \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`\&\&, ||, !` & And, Or, Not \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.72 cm} x{5.28 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Functions}}  \tn
% Row 0
\SetRowColor{LightBackground}
Declare a function & `function {\bf{myFunc(p1, p2)}} \{ \{\{nl\}\} ~~~~statements;\{\{nl\}\} ~~~~{\bf{return}} p1 + p2;\{\{nl\}\}\}` \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
Use a function & `x = {\bf{myFunc(1, 5)}};` \tn 
% Row Count 8 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Function variable & `var f = {\bf{function(p1, p2)}} \{ \{\{nl\}\}~~~~statements;\{\{nl\}\}~~~~return p1 + p2;\{\{nl\}\} \};` \tn 
% Row Count 13 (+ 5)
% Row 3
\SetRowColor{white}
Use function varialbe & `x = {\bf{f(1, 5)}};` \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Conditionals}}  \tn
% Row 0
\SetRowColor{LightBackground}
if & `{\bf{if }} (x \textgreater{} y) \{ \{\{nl\}\}~~~~statements; \{\{nl\}\}\}` \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
if..else & `{\bf{if}} (x \textgreater{} y) \{ \{\{nl\}\}~~~~statements; \{\{nl\}\}\} {\bf{else}} \{\{\{nl\}\} ~~~~statements; \{\{nl\}\}\}` \tn 
% Row Count 8 (+ 5)
% Row 2
\SetRowColor{LightBackground}
if..else if & `{\bf{if}} (x \textgreater{} y) \{ \{\{nl\}\}~~~~statements; \{\{nl\}\}\} {\bf{else if}} (x \textgreater{} z) \{ \{\{nl\}\}~~~~statements; \{\{nl\}\}\} {\bf{else}} \{\{\{nl\}\} ~~~~statements; \{\{nl\}\}\}` \tn 
% Row Count 15 (+ 7)
% Row 3
\SetRowColor{white}
\seqsplit{switch..case} & `{\bf{switch}}(x) \{ \{\{nl\}\}~~~~{\bf{case}} 1:\{\{nl\}\}~~~~~~~~statements;\{\{nl\}\}~~~~~~~~{\bf{break;}}\{\{nl\}\}~~~~{\bf{case}} 2:\{\{nl\}\}~~~~~~~~statements;\{\{nl\}\}~~~~~~~~{\bf{break;}}\{\{nl\}\}~~~~{\bf{default:}}\{\{nl\}\}~~~~~~~~statements;\{\{nl\}\}\}` \tn 
% Row Count 31 (+ 16)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.6 cm} x{6.4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Loops}}  \tn
% Row 0
\SetRowColor{LightBackground}
`while` & `var x = 0; \{\{nl\}\}{\bf{while}} (x \textless{} y) \{ \{\{nl\}\}~~~~statements;\{\{nl\}\} ~~~~++x;\{\{nl\}\}\}` \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
`for` & `{\bf{for}} (var x = 0; x \textless{} y; ++x) \{ \{\{nl\}\}~~~~statements; \{\{nl\}\} \}` \tn 
% Row Count 7 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{`continue`} & Stop current iteration, continue with next one \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
`break` & Stop loop immediately \tn 
% Row Count 10 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{`for/in`} & `var x = {[} "abc", "efg", "hij" {]};\{\{nl\}\}{\bf{for}} (i {\bf{in}} x) \{ \{\{nl\}\}~~~~statements; // i = 0,1,2...\{\{nl\}\} \}` \tn 
% Row Count 14 (+ 4)
% Row 5
\SetRowColor{white}
\seqsplit{`for/of`} & `var x = {[} "abc", "efg", "hij" {]};\{\{nl\}\}{\bf{for}} (i {\bf{of}} x) \{ \{\{nl\}\}~~~~statements; // i = "abc","efg",..\{\{nl\}\} \}` \tn 
% Row Count 19 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Arrays}}  \tn
% Row 0
\SetRowColor{LightBackground}
`var a = {[}8, "hi", 6{]}` & Declare and assign \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`var a = {[}{]}` & Declare empty array \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`a{[}0{]}` & Extract the first element \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
`a{[}0{]} = "xx"` & Set the first element \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`a.length` & Length of array \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
`a.push(17)` & Add element to array \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
`a.pop()` & Remove the last element \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
`a.splice(\{\{nl\}\}~s, r,\{\{nl\}\}~e1, e2..)` & From index `s`, remove `r` elements, then add `e1, e2...` \tn 
% Row Count 14 (+ 3)
% Row 8
\SetRowColor{LightBackground}
`a.forEach(f)` & Run function f(e) for each element in array \tn 
% Row Count 17 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.4 cm} x{5.6 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Objects}}  \tn
% Row 0
\SetRowColor{LightBackground}
Literal object & `var x = \{\{\{nl\}\}~~name: "cool",\{\{nl\}\}~~size: 10,\{\{nl\}\}~~sayHi = function() \{\{\{nl\}\}~~~~console.log(this.name);\{\{nl\}\}~~\}\{\{nl\}\}\}` \tn 
% Row Count 7 (+ 7)
% Row 1
\SetRowColor{white}
Constructor & `function MyObj(nm) \{\{\{nl\}\}~~this.name = nm;\{\{nl\}\}~~this.size = 10;\{\{nl\}\}~~this.sayHi = function() \{\{\{nl\}\}~~~~console.log(this.name);\{\{nl\}\}~~\}\{\{nl\}\}\}` \tn 
% Row Count 15 (+ 8)
% Row 2
\SetRowColor{LightBackground}
Create new object & `var x = new MyObj("cool");` \tn 
% Row Count 17 (+ 2)
% Row 3
\SetRowColor{white}
Use object & `console.log(x.size);\{\{nl\}\}x.sayHi();` \tn 
% Row Count 19 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}