\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{Torvak}
\pdfinfo{
  /Title (javascript.pdf)
  /Creator (Cheatography)
  /Author (Torvak)
  /Subject (javascript 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 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Torvak} via \textcolor{DarkBackground}{\uline{cheatography.com/32041/cs/9823/}}}
\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}Torvak \\
  \uline{cheatography.com/torvak} \\
  \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 12th March, 2017.\\
   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{2.43873 cm} x{2.53827 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{DOM (Document Object Model) Document}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{FIND HTML ELEMENTS}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\seqsplit{document.getElementById(id)} & ex: \textless{}div id="idname"\textgreater{} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{document.getElementsByTagName(name)} & ex: all \textless{}p\textgreater{} elements \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{document.getElementsByClassName(name)} & ex: \textless{}p class="className"\textgreater{} returns array \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{document.querySelectorAll("p.intro")}} \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
\seqsplit{document.formName.inputName} & ex: \textless{}form name="formName"\textgreater{}\textless{}input name="inputName"\textgreater{}\textless{}/form\textgreater{} \tn 
% Row Count 11 (+ 3)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{CHANGE HTML ELEMENTS}}} \tn 
% Row Count 12 (+ 1)
% Row 7
\SetRowColor{white}
element.innerHTML =  new html content & ex: \textless{}p\textgreater{}replace content here\textless{}/p\textgreater{} \tn 
% Row Count 14 (+ 2)
% Row 8
\SetRowColor{LightBackground}
element.attribute = new value & change the attribute value of an HTML elem \tn 
% Row Count 17 (+ 3)
% Row 9
\SetRowColor{white}
\seqsplit{element.setAttribute(attribute}, value) & change the attribute value of an HTML elem \tn 
% Row Count 20 (+ 3)
% Row 10
\SetRowColor{LightBackground}
\seqsplit{element.style.property} = new style & change the style of an HTML elem \tn 
% Row Count 22 (+ 2)
% Row 11
\SetRowColor{white}
\seqsplit{element.src='"urlImg.png"} & change value of \textless{}img src="source url"\textgreater{} \tn 
% Row Count 24 (+ 2)
% Row 12
\SetRowColor{LightBackground}
element.value = 'value" & ex: \textless{}input value="new value"\textgreater{} \tn 
% Row Count 26 (+ 2)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Adding and deleteting elements}}} \tn 
% Row Count 27 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\seqsplit{document.createElement(elem)} & ex: \seqsplit{document.create("button")} creates \textless{}button\textgreater{}\textless{}/button\textgreater{} \tn 
% Row Count 30 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.43873 cm} x{2.53827 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{DOM (Document Object Model) Document (cont)}}  \tn
% Row 15
\SetRowColor{LightBackground}
\seqsplit{document.removeChild(elem)} & remove a html elem \tn 
% Row Count 2 (+ 2)
% Row 16
\SetRowColor{white}
\seqsplit{document.appendChild(elem)} & add en html elem \tn 
% Row Count 4 (+ 2)
% Row 17
\SetRowColor{LightBackground}
\seqsplit{document.replaceChild(elem)} & replace an html element ex: \seqsplit{list.replaceChild(textNode}, list.childNodes{[}0{]}) \tn 
% Row Count 8 (+ 4)
% Row 18
\SetRowColor{white}
\seqsplit{document.write(text)} & white into html output stream \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Arrays}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Indexed arrays}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
var objectArray = {[}"Saab", Date.now, myFunction{]}; & cars{[}0{]} returns "Saab" \tn 
% Row Count 4 (+ 3)
% Row 2
\SetRowColor{LightBackground}
var array  = {[}{]} & initialize empty array \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
var array = new array(40) & 40 uninitialized elems! \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Associative arrays}}} \tn 
% Row Count 9 (+ 1)
% Row 5
\SetRowColor{white}
var person = \{firstName:"John", lastName:"Doe", age:46\}; & person.lastName or person{[}"lastName"{]} returns \tn 
% Row Count 12 (+ 3)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Looping indexed arrays}}} \tn 
% Row Count 13 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{for(var i = 0; i \textless{} arrayName.length; i++) \{ return arrayName{[}i{]}\}} \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Looping associative arrays}}} \tn 
% Row Count 16 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{for (var keyEtudiant in tabEtudiant) \{print keyEtudiant+":"+tabEtudiant{[}keyEtudiant{]}\}} \tn 
% Row Count 18 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Array methods}}} \tn 
% Row Count 19 (+ 1)
% Row 11
\SetRowColor{white}
\seqsplit{arrayName.toString()} & convert array contents to string \tn 
% Row Count 21 (+ 2)
% Row 12
\SetRowColor{LightBackground}
arrayName.join(" seperator ") & same as above: elem1 {\emph{ elem2 }} elem3 \tn 
% Row Count 23 (+ 2)
% Row 13
\SetRowColor{white}
arrayName.pop() & removes last elem \tn 
% Row Count 24 (+ 1)
% Row 14
\SetRowColor{LightBackground}
arrayName.puh(elem) & add new element to end of array \tn 
% Row Count 26 (+ 2)
% Row 15
\SetRowColor{white}
arrayName.shift() & removes first elem from array | returns value of arrayName{[}0{]} \tn 
% Row Count 30 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Arrays (cont)}}  \tn
% Row 16
\SetRowColor{LightBackground}
\seqsplit{arrayName.unshift(elem)} & adds new elem to begining of array \tn 
% Row Count 2 (+ 2)
% Row 17
\SetRowColor{white}
arrayName.length & returns number of elems in array \tn 
% Row Count 4 (+ 2)
% Row 18
\SetRowColor{LightBackground}
elete arrayName{[}0{]} & changes first elem of array to undefined \tn 
% Row Count 6 (+ 2)
% Row 19
\SetRowColor{white}
\seqsplit{arrayName.splice(position}, numElems, elemToAdd1, elementToAdd2) & add nzw items to an array \tn 
% Row Count 10 (+ 4)
% Row 20
\SetRowColor{LightBackground}
\seqsplit{arrayName.splice(startingPos},numElemesToDelete) & removes numberOfElems to delete starting from startingPos \tn 
% Row Count 13 (+ 3)
% Row 21
\SetRowColor{white}
var pets = \seqsplit{catsArray.concat(dogArray);} & joins two array together into one \tn 
% Row Count 15 (+ 2)
% Row 22
\SetRowColor{LightBackground}
elem.innerHTML = arrayName; & replaces HTML content of elem by string containing the elems of arrayName \tn 
% Row Count 19 (+ 4)
% Row 23
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Sorting arrays}}} \tn 
% Row Count 20 (+ 1)
% Row 24
\SetRowColor{LightBackground}
arrayName.sort() & sorts elems from less important to most important \tn 
% Row Count 23 (+ 3)
% Row 25
\SetRowColor{white}
arrayName.reverse() & sorts most important to less important \tn 
% Row Count 25 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}