JavaScript code examples

JavaScript code examples - Table of contents

• 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