\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{Phil35}
\pdfinfo{
  /Title (js-anti-seche-2018.pdf)
  /Creator (Cheatography)
  /Author (Phil35)
  /Subject (JS anti-sèche 2018 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}{A31050}
\definecolor{LightBackground}{HTML}{F9F0F4}
\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{JS anti-sèche 2018 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Phil35} via \textcolor{DarkBackground}{\uline{cheatography.com/53795/cs/14534/}}}
\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}Phil35 \\
  \uline{cheatography.com/phil35} \\
  \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 1st February, 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*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Pratique}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{alert(message) \newline  \newline var nomvar123 = 4 \newline  \newline console.log( "la variable vaut" + nomvar123 ) \newline  \newline /{\emph{ commentaire }}/ \newline  \newline if( typeof variable == "undefined" ) \{ \} \newline  \newline \textless{}script src="chemin/fichier.js"\textgreater{} \textless{}/script\textgreater{}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Maths}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{division = Math.floor(y/x); \newline modulo = y \% x; \newline Math.pow(2, 3) \newline  \newline num="123" \newline parsInt( num); \newline  \newline var num = 5.56789; \newline console.log(  num.toFixed(2) ); // 5.57  \newline  \newline Attention + est aussi opérateur de concaténation de chaines} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Variables et tableaux}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{var tab = {[} {]} \newline  \newline tab.push( 3 ); \newline tab.length \newline  \newline string : \newline var info = "Bonjour à tous" ; \newline info.length \newline info{[}1{]} == 'o' \newline info.indexOf( 'o' ) = 1 ( -1 si pas trouvé) \newline  \newline  \newline tab = Array( 1, 2, 3, true, "Bonjour" ) \newline  \newline for( var= i=0 ; i \textless{} 5 ; i++ ) \{ \} \newline  \newline for( var key in tab )  \newline \{ console.log(  "tab{[}", key, "{]}= ", tab( key) ); \newline  \newline /{\emph{ le tableau a un index forcément numerique entier. }}/ \newline tableau : indices 0 à n-1 \newline Il peut avoir des trous :  tab{[}1000{]} = value} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Manipulation du DOM}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{document.getElementById( 'testid'); \newline  \newline /{\emph{ ajout supression de classe css }}/ \newline document.getElementById("monElement").classList.add("maClasse", "other");  \newline document.getElementById("monElement").classList.remove("maClasse", "other");  \newline if ( \seqsplit{document.getElementById("monElement").classList.contains("maClasse")} )  \newline 	document.getElementById("monElement").classList.toggle("maClasse");  \newline  \newline function checkInput( self) \{ \newline   self.style.boxShadow = " 0 0 3px blue" ; /* hallo de l'élément ayant le focus du clavier souris" \newline   self.style.boxBorder = "1px solid blue" ; \newline \} \newline  \newline  \newline element.innerHTML = "duCode html" \newline var duCodeHtml = element.innerHTML; \newline  \newline var elem = \seqsplit{document.createElement('div');} \newline elem.style.cssText = \seqsplit{'position:absolute;width:100\%;height:100\%;opacity:0}.3;z-index:100;background:\#000'; \newline document.body.appendChild(elem); \newline  \newline  \newline  // Get the element with id="myDIV" (a div), then get all \textless{}h2\textgreater{}, \textless{}div\textgreater{} and \textless{}span\textgreater{} elements inside myDIV \newline var tabElts = \seqsplit{document.getElementById("myDIV")}.{\bf{querySelectorAll}}("h2, div, span"); \newline for ( var i in tabElts  ) // mauvais choix : ça ne marche pas sur un objet \newline for ( var i = 0 ; i \textless{} tabElts.length ; i++  ) \newline \{ \newline     tabElts{[}i{]}.style.backgroundColor = "red"; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{json et tableaux associatifs}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{var element = \{\} ; \newline  \newline element.toto.titi \newline element{[} "toto"{]}{[}"titi" {]} \newline element{[} "toto"{]}.titi} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Evénements}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\seqsplit{element.addEventListener(} "click", unefonction ); \newline  \newline onfocus \newline onblur	(je perds le focus) \newline onChange après modification \newline onError	\textless{}img src="toto.gif" \seqsplit{onError="javascript:alert('cette} image n\textbackslash{}'existe pas');"\textgreater{} \newline onDblClick (en double-cliquant) \newline onMouseDown \newline onMouseMove \newline onMouseOver \newline onMouseOut \newline onLoad \newline onUnload \newline onReset} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{possible aussi directement dans le code html : \newline \textless{}button id="id1" onclick="javascript:code js, mais de préférence une fonction js" \textgreater{}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{fonctions}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{function nomdelafonction( param1, param2 ) \{ code  \}; \newline  \newline var nomdelafonction = function( param1, param2 ) \{ code  \};} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{paramètres d'entrée non typés, nom comptés...}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Structures de contrôle}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{if( ) \{ \} ; \newline  \newline if( ) \{ \} else \{ \} ;} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}