JavaScript code examples

Operators
- . (property access)
- [ ] (array index)
- ( ) (function call)
- new (object creation)
- ++ (unary increment)
- -- (unary decrement)
- - (negation)
- ~ (bitwise complement operation)
- ! (logical complement operation)
- delete (property deletion)
- typeof (data type return)
- void (undefined value return)
- * (multiplication)
- / (division)
- % (division remainder return)
- + (addition)
- - (subtraction)
- + (string concatenation)
- << (left shift)
- >> (right shift with sign preservation)
- >>> (right shift with zero fill)
- < ("less than" comparison)
- < ("comes before" lexicographical comparison)
- <= ("less than or equal to" comparison)
- <= ("comes before or is equal to" lexicographical comparison)
- > ("greater than" comparison)
- > ("comes after" lexicographical comparison)
- >= ("greater than or equal to" comparison)
- >= ("comes after or is equal to" lexicographical comparison)
- instanceof (object type check)
- in (property existence check)
- == (equality test)
- != (inequality test)
- === (identity test)
- !== (non-identity test)
- & (bitwise conjunction
- ^ (bitwise exclusive disjunction)
- | (bitwise disjunction)
- && (logical conjunction)
- || (logical disjunction)
- ? : (conditional assignment)
- = (assignment)
- *= (assignment with multiplication)
- /= (assignment with division)
- %= (assignment with division and return of remainder)
- += (assignment with addition)
- -= (assignment with substraction)
- += (assignment with string concatenation)
- <<= (assignment with left shift)
- >>= (assignment with right shift with sign preservation)
- >>>= (assignment with right shift with zero fill)
- &= (assignment with bitwise conjunction)
- ^= (assignment with bitwise exclusive disjunction)
- |= (assignment with bitwise disjunction)
- , (multiple evaluation)
Methods and properties
- decodeURI(string)
- decodeURIComponent(string)
- encodeURI(string)
- encodeURIComponent(string)
- escape(string) (deprecated)
- eval(string)
- Infinity
- isFinite(number)
- isNaN(value)
- NaN
- parseFloat(string)
- parseInt(string)
- parseInt(string, int)
- undefined
- unescape(string) (deprecated)
- Array
  - ()
  - (size)
  - (value, ...)
  - concat(value, ...)
  - join()
  - join(separator)
  - length
  - pop()
  - push(value, ...)
  - reverse()
  - shift()
  - slice(start)
  - slice(start, end)
  - sort()
  - sort(function)
  - toLocaleString()
  - toString()
  - unshift(value, ...)
- EvalError
  - EvalError()
  - EvalError(string)
  - message
  - name
- Function
  - (arg1, arg2, ..., argN, body)
  - length
  - prototype
  - toString()
- Number
  - NaN
  - NEGATIVE_INFINITY
  - POSITIVE_INFINITY
- Object
  - ()
  - constructor
- String
  - charAt(position)
  - charCodeAt(position)
  - concat(text)
  - fromCharCode(code1, code2, ...,codeN)
  - indexOf(text)
  - indexOf(text, start)
  - lastIndexOf(text)
  - lastIndexOf(text, start)
  - length
  - match(regexp)
  - slice(from)
  - slice(from, to)
  - split(delimiter)
  - split(delimiter, limit)
  - substring(from)
  - substring(from, to)
- SyntaxError
  - SyntaxError()
  - SyntaxError(string)
  - message
  - name
- window
  - alert(message)
  - blur()
  - clearInterval(intervalId)
  - close()
  - closed
  - confirm(message)
  - defaultStatus
  - document
  - frames[]
  - history
  - location
  - Math
  - name
  - navigator
  - opener
  - parent
  - prompt(message)
  - screen
  - self
  - setTimeout(code, delay)
  - status
  - top
  - window
- window.document
  - anchors[]
  - getElementById(id)
  - getElementsByTagName(name)
  - lastModified
  - title
  - URL
  - write(value, ...)
  - writeln(value, ...)
- window.Math
  - abs(number)
  - acos(number)
  - asin(number)
  - atan(number)
  - ceil(number)
  - cos(angle)
  - E
  - exp(number)
  - floor(number)
  - LN10
  - LN2
  - LOG10E
  - LOG2E
  - PI
  - pow(number1, number2)
  - random()
  - round(number)
  - sin(angle)
  - sqrt(number)
  - SQRT1_2
  - SQRT2
  - tan(angle)
Miscellaneous useful examples
- Simulating a static variable

JavaScript code examples - Table of contents