JavaScript

Array Object Methods

Method                      Description

concat()                      Joins two or more arrays, and returns a copy of the joined arrays

indexOf()                    

join()                           Joins all elements of an array into a string

pop()                           Removes the last element of an array, and returns that element

push()                         Adds new elements to the end of an array, and returns the new length

reverse()                     Reverses the order of the elements in an array

shift()                          Removes the first element of an array, and returns that element

slice()                          Selects a part of an array, and returns the new array

sort()                           Sorts the elements of an array

splice()                        Adds/Removes elements from an array

toString()                    Converts an array to a string, and returns the result

unshift()                      Adds new elements to the beginning of an array, and returns the new length

valueOf()                    Returns the primitive value of an array

Boolean Object Properties

Property                     Description

constructor                Returns the function that created the Boolean object's prototype

prototype                   Allows you to add properties and methods to an object

Boolean Object Methods

Method                       Description

toString()                    Converts a Boolean value to a string, and returns the result

valueOf()                    Returns the primitive value of a Boolean object

Object Methods

alt                                Sets or returns the value of the alt attribute of an area        Yes

coords                         Sets or returns the value of the coords attribute of an area Yes

hash                            Sets or returns the anchor part of the href attribute value   Yes

host                             Sets or returns the hostname:port part of the href attribute value  Yes

hostname                   Sets or returns the hostname part of the href attribute value          Yes

href                             Sets or returns the value of the href attribute of an area     Yes

noHref                        Sets or returns the value of the nohref attribute of an area Yes

pathname                   Sets or returns the pathname part of the href attribute value          Yes

port                             Sets or returns the port part of the href attribute value       Yes

protocol                     Sets or returns the protocol part of the href attribute value Yes

search                         Sets or returns the querystring part of the href attribute value        Yes

shape                          Sets or returns the value of the shape attribute of an area  Yes

target                          Sets or returns the value of the target attribute of an area  Yes

Date Object Properties

Property                     Description

constructor                Returns the function that created the Date object's prototype

prototype                   Allows you to add properties and methods to an object

Date Object Methods

Method                       Description

getDate()                    Returns the day of the month (from 1-31)

getDay()                      Returns the day of the week (from 0-6)

getFullYear()               Returns the year (four digits)

getHours()                  Returns the hour (from 0-23)

getMilliseconds()       Returns the milliseconds (from 0-999)

getMinutes()              Returns the minutes (from 0-59)

getMonth()                Returns the month (from 0-11)

getSeconds()              Returns the seconds (from 0-59)

getTime()                    Returns the number of milliseconds since midnight Jan 1, 1970

getTimezoneOffset()  Returns the time difference between GMT and local time, in minutes

getUTCDate()             Returns the day of the month, according to universal time (from 1-31)

getUTCDay()               Returns the day of the week, according to universal time (from 0-6)

getUTCFullYear()        Returns the year, according to universal time (four digits)

getUTCHours()           Returns the hour, according to universal time (from 0-23)

getUTCMilliseconds()            Returns the milliseconds, according to universal time (from 0-999)

getUTCMinutes()       Returns the minutes, according to universal time (from 0-59)

getUTCMonth()          Returns the month, according to universal time (from 0-11)

getUTCSeconds()       Returns the seconds, according to universal time (from 0-59)

getYear()                     Deprecated. Use the getFullYear() method instead

parse()                        Parses a date string and returns the number of milliseconds since midnight of January 1, 1970

setDate()                     Sets the day of the month (from 1-31)

setFullYear()               Sets the year (four digits)

setHours()                   Sets the hour (from 0-23)

setMilliseconds()        Sets the milliseconds (from 0-999)

setMinutes()               Set the minutes (from 0-59)

setMonth()                 Sets the month (from 0-11)

setSeconds()               Sets the seconds (from 0-59)

setTime()                    Sets a date and time by adding or subtracting a specified number of milliseconds to/from midnight January 1, 1970

setUTCDate()              Sets the day of the month, according to universal time (from 1-31)

setUTCFullYear()        Sets the year, according to universal time (four digits)

setUTCHours()            Sets the hour, according to universal time (from 0-23)

setUTCMilliseconds() Sets the milliseconds, according to universal time (from 0-999)

setUTCMinutes()        Set the minutes, according to universal time (from 0-59)

setUTCMonth()          Sets the month, according to universal time (from 0-11)

setUTCSeconds()        Set the seconds, according to universal time (from 0-59)

setYear()                     Deprecated. Use the setFullYear() method instead

toDateString()            Converts the date portion of a Date object into a readable string

toGMTString()            Deprecated. Use the toUTCString() method instead

toLocaleDateString() Returns the date portion of a Date object as a string, using locale conventions

toLocaleTimeString() Returns the time portion of a Date object as a string, using locale conventions

toLocaleString()         Converts a Date object to a string, using locale conventions

toString()                    Converts a Date object to a string

toTimeString()           Converts the time portion of a Date object to a string

toUTCString()             Converts a Date object to a string, according to universal time

UTC()                           Returns the number of milliseconds in a date string since midnight of January 1, 1970, according to universal time

valueOf()                    Returns the primitive value of a Date object

String Object Properties

Property                     Description

constructor                  Returns the function that created the String object's prototype

length                          Returns the length of a string

prototype                    Allows you to add properties and methods to an object

String Object Methods

Method                      Description

charAt()                       Returns the character at the specified index

charCodeAt()               Returns the Unicode of the character at the specified index

concat()                       Joins two or more strings, and returns a copy of the joined strings

fromCharCode()          Converts Unicode values to characters

indexOf()                     Returns the position of the first found occurrence of a specified value in a string

lastIndexOf()               Returns the position of the last found occurrence of a specified value in a string

match()                       Searches for a match between a regular expression and a string, and returns the matches

replace()                     Searches for a match between a substring (or regular expression) and a string, and replaces the matched substring with a new substring

search()                       Searches for a match between a regular expression and a string, and returns the position of the match

slice()                           Extracts a part of a string and returns a new string

split()                            Splits a string into an array of substrings

substr()                        Extracts the characters from a string, beginning at a specified start position, and through the specified number of character

substring()                    Extracts the characters from a string, between two specified indices

toLowerCase()             Converts a string to lowercase letters

toUpperCase()             Converts a string to uppercase letters

valueOf()                     Returns the primitive value of a String object

String HTML Wrapper Methods

The HTML wrapper methods return the string wrapped inside the appropriate HTML tag.

anchor()                      Creates an anchor

big()                             Displays a string using a big font

blink()                          Displays a blinking string

bold()                           Displays a string in bold

fixed()                          Displays a string using a fixed-pitch font

fontcolor()                   Displays a string using a specified color

fontsize()                     Displays a string using a specified size

italics()                        Displays a string in italic

link()                            Displays a string as a hyperlink

small()                         Displays a string using a small font

strike()                         Displays a string with a strikethrough

sub()                            Displays a string as subscript text

sup()                            Displays a string as superscript text

Number Object

The Number object is an object wrapper for primitive numeric values.

Number objects are created with new Number().

Syntax

 var num = new Number(value);

Note: If the value parameter cannot be converted into a number, it returns NaN (Not-a-Number).

Number Object Properties

Property                      Description

constructor                       Returns the function that created the Number object's prototype

MAX_VALUE                Returns the largest number possible in JavaScript

MIN_VALUE                 Returns the smallest number possible in JavaScript

NEGATIVE_INFINITY Represents negative infinity (returned on overflow)

POSITIVE_INFINITY   Represents infinity (returned on overflow)

prototype                        Allows you to add properties and methods to an object

Number Object Methods

Method                      Description

toExponential(x)         Converts a number into an exponential notation

toFixed(x)                    Formats a number with x numbers of digits after the decimal point

toPrecision(x)              Formats a number to x length

toString()                     Converts a Number object to a string

valueOf()                     Returns the primitive value of a Number object

Modifiers are used to perform case-insensitive and global searches:

Modifier                     Description

i                                   Perform case-insensitive matching

g                                  Perform a global match (find all matches rather than stopping after the first match)

m                                 Perform multiline matching