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JavaScript Cheat Sheet by DaveChild

JavaScript methods and functions, a guide to regular expressions and the XMLHttpRequest object.

Regular Expres­sions Syntax

^
Start of string
$
End of string
.
Any single character
(a|b)
a or b
(...)
Group section
[abc]
In range (a, b or c)
[^abc]
Not in range
\s
White space
a?
Zero or one of a
a*
Zero or more of a
a*?
Zero or more, ungreedy
a+
One or more of a
a+?
One or more, ungreedy
a{3}
Exactly 3 of a
a{3,}
3 or more of a
a{,6}
Up to 6 of a
a{3,6}
3 to 6 of a
a{3,6}?
3 to 6 of a, ungreedy
\
Escape character
[:punct:]
Any punctu­ation symbol
[:space:]
Any space character
[:blank:]
Space or tab
There's an excellent regular expression tester at: http:/­/re­gex­pal.com/

Pattern Modifiers

g
Global match
i *
Case-i­nse­nsitive
m *
Multiple lines
s *
Treat string as single line
x *
Allow comments and whitespace in pattern
e *
Evaluate replac­ement
U *
Ungreedy pattern
* PCRE modifier

JavaScript RegExp Object

compile()
lastParen
exec()
leftCO­ntext
global
multiline
ignoreCase
rightC­ontext
input
source
lastIndex
test()
lastMatch
 

JavaScript Event Handlers

onAbort
onMous­eDown
onBlur
onMous­eMove
onChange
onMouseOut
onClick
onMous­eOver
onDblClick
onMouseUp
onDragDrop
onMove
onError
onReset
onFocus
onResize
onKeyDown
onSelect
onKeyPress
onSubmit
onKeyUp
onUnload
onLoad

JavaScript Arrays

concat()
slice()
join()
sort()
length
splice()
pop()
toSource()
push()
toString()
reverse()
unshift()
shift()
valueOf()

JavaScript Numbers and Maths

abs()
min()
acos()
NEGATI­VE_­INF­INITY
asin()
PI
atan()
POSITI­VE_­INF­INITY
atan2()
pow()
ceil()
random()
cos()
round()
E
sin()
exp()
sqrt()
floor()
SQRT1_2
LN10
SQRT2
LN2
tan()
log()
toSource()
LOG10E
toExpo­nen­tial()
LOG2E
toFixed()
max()
toPrec­ision()
MAX_VALUE
toString()
MIN_VALUE
valueOf()
NaN

JavaScript Booleans

toSource()
valueOf()
toString()
 

JavaScript Dates

Date()
setMonth()
getDate()
setFul­lYear()
getDay()
setHours()
getMonth
setMin­utes()
getFul­lYear
setSec­onds()
getYear
setMil­lis­eco­nds()
getHours
setTime()
getMinutes
setUTC­Date()
getSeconds
setUTC­Day()
getMil­lis­econds
setUTC­Month()
getTime
setUTC­Ful­lYear()
getTim­ezo­neO­ffset()
setUTC­Hours()
getUTC­Date()
setUTC­Min­utes()
getUTC­Day()
setUTC­Sec­onds()
getUTC­Month()
setUTC­Mil­lis­eco­nds()
getUTC­Ful­lYear()
toSource()
getUTC­Hours()
toString()
getUTC­Min­utes()
toGMTS­tring()
getUTC­Sec­onds()
toUTCS­tring()
getUTC­Mil­lis­eco­nds()
toLoca­leS­tring()
parse()
UTC()
setDate()
valueOf()

JavaScript Strings

charAt()
slice()
charCo­deAt()
split() x
concat()
substr()
fromCh­arC­ode()
substr­ing()
indexOf()
toLowe­rCase()
lastIn­dexOf()
toUppe­rCase()
length
toLoca­leL­owe­rCase()
locale­Com­pare()
toLoca­leU­ppe­rCase()
match() x
toSource()
replace() x
valueOf()
search() x
String object methods with an x support regular expres­sions.

JavaScript Functions

decode­URI()
isNaN()
decode­URI­Com­pon­ent()
Number()
encode­URI()
parseF­loat()
encode­URI­Com­pon­ent()
parseInt()
escape()
String()
eval()
unescape()
isFinite()
 

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Comments

Piotrek Piotrek, 20:16 28 Feb 12

Where's typof() ?

pdf isjunk pdf isjunk, 15:22 6 Aug 12

When you hit the PDF button, it chops off the bottom of the page and has a second page with your face and half of the credits on it. comical fail. Thought you should know.

Murali Prashanth N Murali Prashanth N, 08:42 16 Feb 13

Thnx...dave

?????????????? ??????????????, 08:43 16 Feb 13

Wheres alert() and prompt()?

Dave Lampton Dave Lampton, 17:16 26 Mar 13

The event handlers should be all lowercase.

santsoh suryawanshi santsoh suryawanshi, 17:44 17 Feb 14

these PDF make easy to create web site ,present and validate as well.
there is no need to open any book or google for any tag.
Thnk you dave.

Er1c Nevertells Er1c Nevertells, 19:45 31 Oct 14

This is a messed up ripoff of other quality quick references, with your mug slapped in it and a shameless plug to your site.

DaveChild DaveChild, 19:47 31 Oct 14

I published the first version of this cheat sheet on ILoveJackDaniels.com in 2005. I don't think there were many others around then, if any. It's been through a few changes in that time, of course, but it's basically the same.

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