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Ultimate JavaScript Cheat Sheet

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JavaScript Cheat Sheet

JavaScript often abbreviated as “JS”, is a high-level, dynamic, untyped, interpreted run-time language.It has been standardized in the ECMAScript language specification. Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production.

Cheat Sheet for JavaScript:

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

 

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()

 

JavaScript Arrays

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

 

JavaScript Functions

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

 

JavaScript Booleans

toSource()
valueOf()
toString()

 

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()

 

JavaScript RegExp Object

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

 

Incrementing /decrementing numbers

Increment++x or x++
Decrement–x or x–

 

The difference is that ++x (–x) returns the incremented (decremented) value, while x++(x–) returns the previous value of x.

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Darshan Savla

Look at the sky. We are not alone. The whole universe is friendly to us and conspires only to give the best to those who dream and work. 

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