Javascript Cheat Sheet

Explore key concepts, syntax, and usage examples for Javascript — perfect for quick reference.

Resource
Online Related
Basic Objects
Array Properties Array Methods Boolean Properties Boolean Methods Math Properties Math Methods Number Properties Number Methods String Properties String Methods String HTML Wrapper Methods Global Properties Global Methods
Date Object
Date Properties Date Methods
Browser
Window Properties Window Methods Navigator Properties Navigator Methods Screen Properties History Properties History Methods Location Properties Location Methods
DOM Events
Mouse Events Keyboard Events Frame Events Form Events Event Object Constant
  • AT_TARGET
  • BUBBLING_PHASE
  • CAPTURING_PHASE
Event Object Properties Event Object Methods
  • initEvent()
  • preventDefault()
  • stopPropagation()
EventTarget Object
  • addEventListener()
  • dispatchEvent()
  • removeEventListener()
EventListener Object
  • handleEvent()
MouseEvent/KeyboardEvent Object MouseEvent/KeyboardEvent Methods
  • initMouseEvent()
  • initKeyboardEvent()
DOM Node
Node Properties Node Methods Node Types
  • Element1
  • Attr2
  • Text3
  • CDATASection4
  • EntityReference5
  • Entity6
  • ProcessingInstruction7
  • Comment8
  • Document9
  • DocumentType10
  • DocumentFragment11
  • Notation12
nodeName Returns
  • Element
    💡 element name
  • Attr
    💡 attribute name
  • Text
    💡 #text
  • CDATASection
    💡 #cdata-section
  • EntityReference
    💡 entity reference name
  • Entity
    💡 entity name
  • ProcessingInstruction
    💡 target
  • Comment
    💡 #comment
  • Document
    💡 #document
  • DocumentType
    💡 doctype name
  • DocumentFragment
    💡 #document fragment
  • Notation
    💡 notation name
nodeValue Returns
  • Element
    💡 null
  • Attr
    💡 attribute value
  • Text
    💡 content of node
  • CDATASection
    💡 content of node
  • EntityReference
    💡 null
  • Entity
    💡 null
  • ProcessingInstruction
    💡 content of node
  • Comment
    💡 comment text
  • Document
    💡 null
  • DocumentType
    💡 null
  • DocumentFragment
    💡 null
  • Notation
    💡 null
RegExp
Modifiers
  • i
    💡 Perform case-insensitive matching
  • g
    💡 Perform a global match (find all matches rather than stopping after the first match)
  • m
    💡 Perform multiline matching
Brackets
  • [abc]
    💡 Find any character between the brackets
  • [^abc]
    💡 Find any character not between the brackets
  • [0-9]
    💡 Find any digit from 0 to 9
  • [A-Z]
    💡 Find any character from uppercase A to uppercase Z
  • [a-z]
    💡 Find any character from lowercase a to lowercase z
  • [A-z]
    💡 Find any character from uppercase A to lowercase z
  • [adgk]
    💡 Find any character in the given set
  • [^adgk]
    💡 Find any character outside the given set
  • (red|blue|green)
    💡 Find any of the alternatives specified
Metacharacters
  • .
    💡 Find a single character, except newline or line terminator
  • \w
    💡 Find a word character
  • \W
    💡 Find a non-word character
  • \d
    💡 Find a digit
  • \D
    💡 Find a non-digit character
  • \s
    💡 Find a whitespace character
  • \S
    💡 Find a non-whitespace character
  • \b
    💡 Find a match at the beginning/end of a word
  • \B
    💡 Find a match not at the beginning/end of a word
  • \0
    💡 Find a NUL character
  • \n
    💡 Find a new line character
  • \f
    💡 Find a form feed character
  • \r
    💡 Find a carriage return character
  • \t
    💡 Find a tab character
  • \v
    💡 Find a vertical tab character
  • \xxx
    💡 Find the character specified by an octal number xxx
  • \xdd
    💡 Find the character specified by a hexadecimal number dd
  • \uxxxx
    💡 Find the Unicode character specified by a hexadecimal number xxxx
Quantifiers
  • n+
    💡 Matches any string that contains at least one n
  • n*
    💡 Matches any string that contains zero or more occurrences of n
  • n?
    💡 Matches any string that contains zero or one occurrences of n
  • n{X}
    💡 Matches any string that contains a sequence of X n's
  • n{X,Y}
    💡 Matches any string that contains a sequence of X to Y n's
  • n{X,}
    💡 Matches any string that contains a sequence of at least X n's
  • n$
    💡 Matches any string with n at the end of it
  • ^n
    💡 Matches any string with n at the beginning of it
  • ?=n
    💡 Matches any string that is followed by a specific string n
  • ?!n
    💡 Matches any string that is not followed by a specific string n
RegExp Properties RegExp Methods
Core DOM
Nodelist Properties Nodelist Methods NamedNodeMap Properties NamedNodeMap Methods Document Properties Document Methods Element Properties Element Methods Attr Properties
Graphics
CanvasRenderingContext2D Methods