\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{Manon Gerrd (manongerard)}
\pdfinfo{
  /Title (javascript.pdf)
  /Creator (Cheatography)
  /Author (Manon Gerrd (manongerard))
  /Subject (JavaScript Cheat Sheet)
}

% Lengths and widths
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\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}{89D0FE}
\definecolor{LightBackground}{HTML}{F0F9FE}
\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}{Manon Gerrd (manongerard)} via \textcolor{DarkBackground}{\uline{cheatography.com/195339/cs/40896/}}}
\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}Manon Gerrd (manongerard) \\
  \uline{cheatography.com/manongerard} \\
  \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 5th November, 2023.\\
   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{1.44 cm} x{6.56 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Data types}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Primitive types}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Number & Number value (integers and floating point) except big integer \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
BigInt & Large integer\{\{nl\}\}Notation: number literal and an n suffix {\emph{e.g.}} -3000000n \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
String & String of characters\{\{nl\}\}Notation: between single or double quotes \tn 
% Row Count 9 (+ 3)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{Boolean} & Boolean - {\emph{true}} or {\emph{false}} \tn 
% Row Count 10 (+ 1)
% Row 5
\SetRowColor{white}
Symbol & Unique identifier \tn 
% Row Count 11 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{Undefined} & No value assigned \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
Null & Deliberate non-value \tn 
% Row Count 14 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Object}}} \tn 
% Row Count 15 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{Function} \tn 
% Row Count 16 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Array} \tn 
% Row Count 17 (+ 1)
% Row 11
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{Date} \tn 
% Row Count 18 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{RegExp\{\{bb\}\}} \tn 
% Row Count 19 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{Error} \tn 
% Row Count 20 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Comments}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{// or /* */} \tn 
% Row Count 1 (+ 1)
\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}{String}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{string}}.length & Returns the length of a string \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\emph{string}}.charAt(index) & Returns the character at the index \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\emph{string}}.concat(string1, string2, ..., stringX) & Concatenates two or more strings \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
{\emph{string}}.match(regex) & Returns an array of all matches, or null if no match \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\emph{string}}.replace(old, new) & Retruns a new string where {\emph{old}} has been replaces by {\emph{new}} \tn 
% Row Count 13 (+ 3)
% Row 5
\SetRowColor{white}
{\emph{string}}.search(regex) & Returns the position of the first match, or -1 if no match \tn 
% Row Count 16 (+ 3)
% Row 6
\SetRowColor{LightBackground}
{\emph{string}}.substring(start, end) & Returns a string containing the characters from start to end (not included) \tn 
% Row Count 20 (+ 4)
% Row 7
\SetRowColor{white}
{\emph{string}}.toLowerCase() & Returns the string converted to lowercase \tn 
% Row Count 23 (+ 3)
% Row 8
\SetRowColor{LightBackground}
{\emph{string}}.toUpperCase() & Returns the string converted to uppercase \tn 
% Row Count 26 (+ 3)
% Row 9
\SetRowColor{white}
"age:" + age + " years" \{\{fa-arrows-h\}\} \textbackslash{}`age: \$\{age\} years\textbackslash{}` & Template literal: allows you to write strings with embedded expressions more succinctly \tn 
% Row Count 31 (+ 5)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{String (cont)}}  \tn
% Row 10
\SetRowColor{LightBackground}
{\bf{Escape character}} : \textbackslash{} & \textbackslash{}', \textbackslash{}", \textbackslash{}\textbackslash{}, (\textbackslash{}b, \textbackslash{}f, \textbackslash{}n, \textbackslash{}r, \textbackslash{}t, \textbackslash{}v) \tn 
% Row Count 2 (+ 2)
\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}{Boolean}}  \tn
% Row 0
\SetRowColor{LightBackground}
false, 0, empty strings ( "" ), NaN, null, and undefined & interpreted as {\emph{false}}, the rest as {\emph{true}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Boolean(expr) & Explicit conversion to Boolean \tn 
% Row Count 5 (+ 2)
\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}{Array}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{e.g}} const {\emph{array}} = {[}"a", 10, "c"{]} & Create an array \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\emph{array}}.length & {\bf{Sets}} or returns the number of elements in an array \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Can assign any properties to array, like indices. The only "magic" is that length will be automatically updated when you set a particular index.\{\{nl\}\}This can create sparse array} \tn 
% Row Count 9 (+ 4)
% Row 3
\SetRowColor{white}
{\emph{array}}{[}index{]} \{\{fa-arrows-h\}\} {\emph{array}}.at(index) & Returns the array at the index \tn 
% Row Count 12 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\emph{array}}.concate(string1, string2, ..., stringX) & Concatenates two or more arrays \tn 
% Row Count 15 (+ 3)
% Row 5
\SetRowColor{white}
{\emph{array}}.every(fct, value) & Returns true if every element pass the test, otherwise false \tn 
% Row Count 18 (+ 3)
% Row 6
\SetRowColor{LightBackground}
{\emph{array}}.flat(depth) & Concatenates sub-array elements \tn 
% Row Count 20 (+ 2)
% Row 7
\SetRowColor{white}
{\emph{array}}.foreach(fct, value) & Calls a function for each array element \tn 
% Row Count 22 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\emph{array}}.indexOf() & Search the array for an element and returns its position \tn 
% Row Count 25 (+ 3)
% Row 9
\SetRowColor{white}
{\emph{array}}.lastIndexOf() & Search the array for an element, starting at the end, and returns its position \tn 
% Row Count 29 (+ 4)
% Row 10
\SetRowColor{LightBackground}
{\emph{array}}.pop() & Removes the last element of an array, and returns that element \tn 
% Row Count 33 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Array (cont)}}  \tn
% Row 11
\SetRowColor{LightBackground}
{\emph{array}}.push(item1, item2, ..., itemX) & Adds new elements to the end of an array, and returns the new length \tn 
% Row Count 4 (+ 4)
% Row 12
\SetRowColor{white}
{\emph{array}}.sort() & Sorts the elements of an array \tn 
% Row Count 6 (+ 2)
% Row 13
\SetRowColor{LightBackground}
{\emph{array}}.toString & Converts an array to a string, and returns the result \tn 
% Row Count 9 (+ 3)
% Row 14
\SetRowColor{white}
{\emph{array}}.valueOf() & Returns the primitive value of an array \tn 
% Row Count 11 (+ 2)
% Row 15
\SetRowColor{LightBackground}
{\emph{array}}.filter(function(currentValue, index, arr), thisValue) & Creates a new array filled with elements that pass a test provided by a function. \tn 
% Row Count 16 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Index starts at 0 like in Java or C \newline Arrays are not limited in type of elements}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{RegExp}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{\seqsplit{https://www.w3schools.com/js/js\_regexp.asp}} \tn 
% Row Count 1 (+ 1)
\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}{Date}}  \tn
% Row 0
\SetRowColor{LightBackground}
new Date() & Create the current date and time \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
new Date({\emph{date string}} | year, month, {\emph{{[}day, hours, minutes, seconds, ms{]}}} | {\emph{milliseconds}}) & Create a specific date and time \tn 
% Row Count 7 (+ 5)
% Row 2
\SetRowColor{LightBackground}
Date.now() & Returns the number of milliseconds since January 1, 1970 \tn 
% Row Count 10 (+ 3)
% Row 3
\SetRowColor{white}
{\emph{date}}.parse() & Parses a date string and returns the number of milliseconds since {\bf{January 1, 1970}} \tn 
% Row Count 15 (+ 5)
% Row 4
\SetRowColor{LightBackground}
{\emph{date}}.get{\emph{{[}UTC{]}}}{[}Date | FullYear | Month | Day | Hours | Minutes | Seconds | Milliseconds | Time{]}() & Geters \tn 
% Row Count 20 (+ 5)
% Row 5
\SetRowColor{white}
{\emph{date}}.set{\emph{{[}UTC{]}}}{[}Date | FullYear | Month | Hours | Minutes | Seconds | Milliseconds | Time{]}() & Seters \tn 
% Row Count 25 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{\{\{fa-warning\}\}JavaScript counts months from 0 to 11 and days from 0 to 6\{\{nl\}\}{\emph{date string}} format : \{\{nl\}\}- ISO: YYYY{\emph{{[}-MM-DDTHH:MM:SSZ{]}}}\{\{nl\}\}- short: MM/DD/YYYY\{\{nl\}\}- long: MMM DD YYYY}  \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}{Class (similar to Java)}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{JavaScript offers the class syntax that's very similar to languages like Java. \newline  \newline class Person \{ \newline     constructor(name) \{ \newline         this.name = name; \newline     \} \newline     sayHello() \{ \newline     return `Hello, I'm \$\{this.name\}!`; \newline \} \newline \} \newline const p = {\emph{new}} Person("Maria"); \newline console.log(p.sayHello());} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{`this` refers to the person object}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.68 cm} x{4.32 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Arithmetic operators (similar to C/Java)}}  \tn
% Row 0
\SetRowColor{LightBackground}
x + y (numeric) & Adds x and y together \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x (numeric or string) + y (string) & Concatinates x and y together \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
x - y & Subtracts y from x \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
x * y & Multiplies x and y together \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
x / y & Divides x by y \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
x \% y & x modulo y: the remainder when x is divided by y \tn 
% Row Count 10 (+ 3)
% Row 6
\SetRowColor{LightBackground}
x ** y & x to the power of y \tn 
% Row Count 11 (+ 1)
% Row 7
\SetRowColor{white}
x++, ++x & Increment x (postfix and prefix) \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
x-{}-, -{}-x & Decrement x (postfix and prefix) \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Same operator precedence as usual}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.32 cm} x{5.68 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Assignment operators (similar to C/Java)}}  \tn
% Row 0
\SetRowColor{LightBackground}
x = y & Sets x to the value of y \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x {\emph{op}}= y & Same as x = x {\emph{op}} y \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
x:{\emph{number}} & size.x = {\emph{number}} \tn 
% Row Count 3 (+ 1)
\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}{Comparison operators (similar to C/Java)}}  \tn
% Row 0
\SetRowColor{LightBackground}
x \textgreater{} y & Returns true if x is greater than y \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
x \textgreater{}= y & Returns true if x is greater than or equal to y \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
x \textless{} y & Returns true if x is less than y \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
x \textless{}= y & Returns true if x is less than or equal to y \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
x == y & Returns true if x and y are equal\{\{nl\}\}Note: performs type coercion \tn 
% Row Count 14 (+ 4)
% Row 5
\SetRowColor{white}
x != y & Returns true if x and y are not equal\{\{nl\}\}Note: performs type coercion \tn 
% Row Count 18 (+ 4)
% Row 6
\SetRowColor{LightBackground}
x === y & Returns true if x and y are equal in value and type \tn 
% Row Count 21 (+ 3)
% Row 7
\SetRowColor{white}
x !== y & Returns true if x and y are not equal in value or type \tn 
% Row Count 24 (+ 3)
% Row 8
\SetRowColor{LightBackground}
{\emph{condition}} ? {\emph{exprIfTrue}} : {\emph{exprIfFalse}} & Returns {\emph{exprIfTrue}} if {\emph{condition}} is true, {\emph{exprIfFalse}} otherwise \tn 
% Row Count 28 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{\{\{fa-warning\}\} Strings are compared alphabetically}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.68 cm} x{6.32 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Bitwise operators (similar to C/Java)}}  \tn
% Row 0
\SetRowColor{LightBackground}
x \& y & x AND y \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x | y & x OR y \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textasciitilde{}x & NOT x \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
x \textasciicircum{} y & x XOR y \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
x \textless{}\textless{} y & x left shift of y \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
x \textgreater{}\textgreater{} y & x right shift of y \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
x \textgreater{}\textgreater{}\textgreater{} y & x unsigned right shift of y \tn 
% Row Count 7 (+ 1)
\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}{Type operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
typeof & Returns the type of a variable \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\seqsplit{instanceof} & Returns true if an object is an instance of an object type \tn 
% Row Count 3 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.92 cm} x{4.08 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Number}}  \tn
% Row 0
\SetRowColor{LightBackground}
parseInt(string, radix) & Parses the string into an integer \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
parseFloat(string, radix) & Parses the string into a floating-point number \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
Number(value) & Parses the value into a number if possible \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
NaN & "Not a number" value \tn 
% Row Count 9 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Infinity & Positive or negative infinity value \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
Math.{\emph{function}}() & Math library has a lot of math functions \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\emph{e.g.}} abs, cbrt, ceil, cos, exp, floor, log, log10, max, min, pow, random, round, sign, sin, sqrt, tan,...} \tn 
% Row Count 16 (+ 3)
% Row 7
\SetRowColor{white}
Math.{\emph{constant}}\{\{nl\}\}{\emph{e.g.}} E, PI, ... & Math library has a lot of math constants \tn 
% Row Count 18 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\emph{e.g.}} 0b1010, 0o12, 10, 0xA, 0.1e2 & Prefixes to indicate the base or an exponent suffix \tn 
% Row Count 21 (+ 3)
\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}{Symbol}}  \tn
% Row 0
\SetRowColor{LightBackground}
Symbol(expr) & Create a unique Symbol with key expr \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{Symbol.for(expr)} & Return the Symbol with the key expr, if it doesn't exists a new Symbol is created and returned. \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{Symbol.keyFor(symbol)} & Returns the string key corresponding to symbol \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{Many functions similar to string also exists, they call string's function} \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Object}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{JavaScript objects can be thought of as collections of key-value pairs. They are hashes. They do not have fixed \newline shapes - properties can be added, deleted, re-ordered, mutated, or dynamically queried at any time. Objects keys are always {\bf{strings}} or {\bf{symbols}}. \newline  \newline const obj = \{ \newline     name: "Carrot", \newline     for: "Max", \newline     details: \{ \newline         color: "orange", \newline         size: 12, \newline     \}, \newline     fullDescr: function() \{ \newline        return this.name + " for " + this.for; \newline     \} \newline \}; \newline  \newline Object properties can be accessed using dot ( . ) or square brackets ( {[}{]} ). {\emph{e.g.}} obj.name or obj{[}"name"{]}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{A method is a function stored as a property.}  \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}{Function}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Function Declaration}} \newline % Row Count 1 (+ 1)
`function fctName({\emph{args}}) \{ {\emph{code}} \}` \newline % Row Count 2 (+ 1)
 Like in Python, it is possible to assign a default value to the arguments \newline % Row Count 4 (+ 2)
{\bf{Anonymous functions}} \newline % Row Count 5 (+ 1)
`const {\emph{var}} = (function ({\emph{args}}) \{ \newline % Row Count 6 (+ 1)
    {\emph{code}} \newline % Row Count 7 (+ 1)
\});` \newline % Row Count 8 (+ 1)
Use `{\emph{var}}() \{\}` \newline % Row Count 9 (+ 1)
`function` is not mandatory \newline % Row Count 10 (+ 1)
{\bf{Function Invocation}} \newline % Row Count 11 (+ 1)
The code inside the function will execute when "something" invokes (calls) the function: \newline % Row Count 13 (+ 2)
- When an event occurs (when a user clicks a button) \newline % Row Count 15 (+ 2)
- When it is invoked (called) from JavaScript code \newline % Row Count 17 (+ 2)
- Automatically (self invoked) \newline % Row Count 18 (+ 1)
{\bf{Arrow functions}} \newline % Row Count 19 (+ 1)
`product = (a, b) =\textgreater{} a * b;`% Row Count 20 (+ 1)
} \tn 
\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}{Variables}}  \tn
% Row 0
\SetRowColor{LightBackground}
let {\emph{var}} & Declare a block scope local variable \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
const {\emph{var}} & Declare a block scope variable whose value is never intended to change\{\{nl\}\}It cannot be reassigned, therefore it must be initialized \tn 
% Row Count 7 (+ 5)
% Row 2
\SetRowColor{LightBackground}
var {\emph{var}} & Declare a variable, not block-scoped -\textgreater{} discouraged in modern JavaScript \tn 
% Row Count 10 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{\{\{fa-warning\}\} different that in C/Java: let and const declared variables occupy the entire scope they are defined in, and are in a region known as the temporal dead zone before the actual line of declaration. \newline JavaScript is dynamically typed (like Python), for let can change the type through reassignment}  \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}{Control structures (similar to C)}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{- {\bf{if and else}} \newline \{\{bb = 1\}\} \newline if ({\emph{cdt}}) \{ \newline     {\emph{code}} \newline \} else if ({\emph{cdt}}) \{ \newline     {\emph{code}} \newline \} else \{ \newline     {\emph{code}} \newline \} \newline  \newline - {\bf{while}} \newline while ({\emph{cdt}}) \{ \newline     {\emph{code}} \newline \} \newline  \newline - {\bf{do ... while}} \newline do \{ \newline     {\emph{code}} \newline \} while ({\emph{cdt}}); \newline  \newline - {\bf{for loop}} \newline for ({\emph{init}}; {\emph{condition}}; {\emph{update}}) \{ \newline     {\emph{code}} \newline \} \newline  \newline - {\bf{for ... of}} \newline It iterates over iterables, most notably arrays, \newline for (const value of array) \{ \newline     {\emph{code}} \newline \} \newline  \newline - {\bf{for ... in}} \newline It visits all enumerable properties of an object. \newline for (const property in object) \{ \newline     {\emph{code}} \newline \} \newline  \newline - {\bf{switch}} \newline switch(variable/expression) \{ \newline     case value1:   \newline         // body of case 1 \newline         break; \newline     case value2:   \newline         // body of case 2 \newline         break; \newline     case valueN: \newline         // body of case N \newline         break; \newline     default: \newline         // body of default \newline \} \newline break works like in C/Java. If you don't add a break statement, execution will "fall through" to the next level. \newline Comparison using ===, cases can be any expression \newline  \newline - {\bf{throw}} \newline Errors can be thrown using the throw statement. \newline throw new Error({\emph{string}}); \newline  \newline - {\bf{try ... catch}} \newline try \{ \newline    {\emph{code}}; \newline \} catch (e) \{ \newline     console.error({\emph{string}}, e); \newline \} \newline There's no conditional catch in JavaScript — if you only want to handle one type of error, you need to catch everything, identify the type of error using instanceof, and then rethrow the other cases. \newline try \{ \newline    {\emph{code}}; \newline \} catch (e) \{ \newline    if (e instanceof RangeError) \{ \newline       {\emph{code}} \newline \} else \{ \newline    throw e; \newline    \} \newline \} \newline  \newline - {\bf{return}} \newline  \newline - {\bf{continue}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{1.12 cm} x{6.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Logical operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
x \&\& y & Returns true if both x and y are true \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
x || y & Returns true if x or y is true \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
!x & Returns true if x is false \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.016 cm} x{3.024 cm} x{1.224 cm} x{0.936 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{8.4cm}}{\bf\textcolor{white}{HTML events}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{8.4cm}}{\textless{}{\emph{element}} {\emph{event}}="{\emph{some JavaScript}}"\textgreater{}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{Window Event Attributes}} & inside \textless{}body\textgreater{} &  &  \tn 
% Row Count 4 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{onafterprint} & onbeforeprint & \seqsplit{onbeforeunload} & \seqsplit{onerror} \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
\seqsplit{onhashchange} & onmessage & \seqsplit{onoffline} & \seqsplit{ononline} \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
onpagehide & onpageshow & \seqsplit{onpopstate} & \seqsplit{onresize} \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
onstorage & onunload &  &  \tn 
% Row Count 12 (+ 1)
% Row 6
\SetRowColor{LightBackground}
{\bf{Form Events}} & in form elements &  &  \tn 
% Row Count 14 (+ 2)
% Row 7
\SetRowColor{white}
onblur & onchange & \seqsplit{oncontextmenu} & \seqsplit{onfocus} \tn 
% Row Count 17 (+ 3)
% Row 8
\SetRowColor{LightBackground}
oninput & oninvalid & \seqsplit{onreset} & \seqsplit{onsearch} \tn 
% Row Count 19 (+ 2)
% Row 9
\SetRowColor{white}
onselect & onsubmit &  &  \tn 
% Row Count 20 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{8.4cm}}{{\bf{Keyboard Events}}} \tn 
% Row Count 21 (+ 1)
% Row 11
\SetRowColor{white}
onkeydown & onkeypress & \seqsplit{onkeyup} &  \tn 
% Row Count 23 (+ 2)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{8.4cm}}{{\bf{Mouse Events}}} \tn 
% Row Count 24 (+ 1)
% Row 13
\SetRowColor{white}
onclick & ondblclick & \seqsplit{onmousedown} & \seqsplit{onmousemove} \tn 
% Row Count 27 (+ 3)
% Row 14
\SetRowColor{LightBackground}
onmouseout & onmouseover & \seqsplit{onmouseup} & \seqsplit{onwheel} \tn 
% Row Count 29 (+ 2)
% Row 15
\SetRowColor{white}
\mymulticolumn{4}{x{8.4cm}}{{\bf{Drag Events}}} \tn 
% Row Count 30 (+ 1)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{2.016 cm} x{3.024 cm} x{1.224 cm} x{0.936 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{8.4cm}}{\bf\textcolor{white}{HTML events (cont)}}  \tn
% Row 16
\SetRowColor{LightBackground}
ondrag & ondragend & \seqsplit{ondragenter} & \seqsplit{ondragleave} \tn 
% Row Count 3 (+ 3)
% Row 17
\SetRowColor{white}
ondragover & ondragstart & \seqsplit{ondrop} & \seqsplit{onscroll} \tn 
% Row Count 5 (+ 2)
% Row 18
\SetRowColor{LightBackground}
\mymulticolumn{4}{x{8.4cm}}{{\bf{Clipboard Events}}} \tn 
% Row Count 6 (+ 1)
% Row 19
\SetRowColor{white}
oncopy & oncut & \seqsplit{onpaste} &  \tn 
% Row Count 8 (+ 2)
% Row 20
\SetRowColor{LightBackground}
{\bf{Media Events}} & Inside \textless{}audio\textgreater{}, \textless{}embed\textgreater{}, \textless{}img\textgreater{}, \textless{}object\textgreater{} and \textless{}video\textgreater{} &  &  \tn 
% Row Count 12 (+ 4)
% Row 21
\SetRowColor{white}
onabort & oncanplay & \seqsplit{oncanplaythrough} & \seqsplit{oncuechange} \tn 
% Row Count 15 (+ 3)
% Row 22
\SetRowColor{LightBackground}
\seqsplit{ondurationchange} & onemptied & \seqsplit{onended} & \seqsplit{onerror} \tn 
% Row Count 17 (+ 2)
% Row 23
\SetRowColor{white}
\seqsplit{onloadeddata} & \seqsplit{onloadedmetadata} & \seqsplit{onloadstart} & \seqsplit{onpause} \tn 
% Row Count 19 (+ 2)
% Row 24
\SetRowColor{LightBackground}
onplay & onplaying & \seqsplit{onprogress} & \seqsplit{onratechange} \tn 
% Row Count 22 (+ 3)
% Row 25
\SetRowColor{white}
onseeked & onseeking & \seqsplit{onstalled} & \seqsplit{onsuspend} \tn 
% Row Count 24 (+ 2)
% Row 26
\SetRowColor{LightBackground}
\seqsplit{ontimeupdate} & onvolumechange & \seqsplit{onwaiting} &  \tn 
% Row Count 26 (+ 2)
% Row 27
\SetRowColor{white}
\mymulticolumn{4}{x{8.4cm}}{{\bf{Misc Events}}} \tn 
% Row Count 27 (+ 1)
% Row 28
\SetRowColor{LightBackground}
ontoggle & Fires when the user opens or closes the \textless{}details\textgreater{} element &  &  \tn 
% Row Count 31 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}