Home / lang / javascript / index

Javascript browser support

ECMA-262 Specification

version

version	Release Date
ES1	1997
ES3	1999
ES5	2009
5.1	June 2011
ES6	June 2015
ES7	June 2016
ES8	June 2017
ES9	June 2018
ES10	June 2019
ES11	June 2020
ES12	June 2021

NodeJS ES20215 support

Array

Name	Chrome	Edge	Firefox	Safari	IE	desc
at()	v66, Jul 2021	v79, Jul 2021	v61, Jul 2021	v12, Mar 2022		returns an indexed element from an array, same as `[]`
`concat()`	ES1	ES1	ES1	ES1	ES1	Joins arrays and returns an array with the joined arrays
`constructor`	ES1	ES1	ES1	ES1	ES1	Returns the function that created the Array object's prototype
copyWithin()	ES6	ES6	ES6	ES6		Copies array elements within the array, to and from specified positions
entries()	ES6	ES6	ES6	ES6		Returns a key/value pair Array Iteration Object
every()	ES5	ES5	ES5	ES5	9-11	Checks if every element in an array pass a test
fill()	ES6	ES6	ES6	ES6		Fill the elements in an array with a static value
filter()	ES5	ES5	ES5	ES5	9-11	Creates a new array with every element in an array that pass a test
find()	ES6	ES6	ES6	ES6		Returns the value of the first element in an array that pass a test
findIndex()	ES6	ES6	ES6	ES6		Returns the index of the first element in an array that pass a test
falt()	v69, Sep 2018	v79, Jan 2020	v62, Sep 2018	v12, Sep 2018		concatenates sub-array elements
flatMap()	v69, Sep 2018	v79, Jan 2020	v62, Sep 2018	v12, Sep 2018		first maps all elements of an array and then creates a new array by flattening the array
forEach()	ES5	ES5	ES5	ES5	9-11	Calls a function for each array element
from()	ES6	ES6	ES6	ES6		Creates an array from an object
includes()	ES7	ES7	ES7	ES7		Check if an array contains the specified element
indexOf()	ES5	ES5	ES5	ES5	9-11	Search the array for an element and returns its position
isArray()	ES5	ES5	ES5	ES5	9-11	Checks whether an object is an array
`join()`	ES1	ES1	ES1	ES1	ES1	Joins all elements of an array into a string
keys()	ES6	ES6	ES6	ES6		Returns a Array Iteration Object, containing the keys of the original array
lastIndexOf()	ES5	ES5	ES5	ES5	9-11	Search the array for an element, starting at the end, and returns its position
`length`	ES1	ES1	ES1	ES1	ES1	Sets or returns the number of elements in an array
map()	ES5	ES5	ES5	ES5	9-11	Creates a new array with the result of calling a function for each array element
`pop()`	ES1	ES1	ES1	ES1	ES1	Removes the last element of an array, and returns that element
`prototype`	ES1	ES1	ES1	ES1	ES1	Allows you to add properties and methods to an Array object
`push()`	ES1	ES1	ES1	ES1	ES1	Adds new elements to the end of an array, and returns the new length
reduce()	ES5	ES5	ES5	ES5	9-11	Reduce the values of an array to a single value (going left-to-right)
reduceRight()	ES5	ES5	ES5	ES5	9-11	Reduce the values of an array to a single value (going right-to-left)
`reverse()`	ES1	ES1	ES1	ES1	ES1	Reverses the order of the elements in an array
`shift()`	ES1	ES1	ES1	ES1	ES1	Removes the first element of an array, and returns that element
`slice()`	ES1	ES1	ES1	ES1	ES1	Selects a part of an array, and returns the new array
some()	ES3	ES3	ES3	ES3	ES3	Checks if any of the elements in an array pass a test
`sort()`	ES1	ES1	ES1	ES1	ES1	Sorts the elements of an array
`splice()`	ES1	ES1	ES1	ES1	ES1	Adds/Removes elements from an array
`toString()`	ES1	ES1	ES1	ES1	ES1	Converts an array to a string, and returns the result
`unshift()`	ES1	ES1	ES1	ES1	ES1	Adds new elements to the beginning of an array, and returns the new length
`valueOf()`	ES1	ES1	ES1	ES1	ES1	Returns the primitive value of an array

Class

Name	Chrome	Edge	Firefox	Safari	desc
constructor()	ES6	ES6	ES6	ES6	Fill the elements in an array with a static value
extends()	ES6	ES6	ES6	ES6	create a child class of another class (parent)
static()	ES6	ES6	ES6	ES6	defines static methods for classes
super()	ES6	ES6	ES6	ES6	is used to call the constructor of its parent class to access the parent's properties and methods

Date

Name	Chrome	Edge	Firefox	Safari	IE	desc
`constructor`	ES1	ES1	ES1	ES1	ES1	Returns the function that created the Date object's prototype
`getDate()`						Returns the day of the month (from 1-31)
`getDay()`						Returns the day of the week (from 0-6)
`getFullYear()`						Returns the year (1000 and 9999)
`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, and a specified date
`getTimezoneOffset()`						Returns the time difference between UTC time 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, Sun = 0)
`getUTCFullYear()`						Returns the year, according to universal time
`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
now()	ES5	ES5	ES5	ES5	9-11	Returns the number of milliseconds since midnight Jan 1, 1970
`parse()`						Parses a date string and returns the number of milliseconds since January 1, 1970
`prototype`						Allows you to add properties and methods to an object
`setDate()`						Sets the day of the month of a date object
`setFullYear()`						Sets the year of a date object
`setHours()`						Sets the hour of a date object
`setMilliseconds()`						Sets the milliseconds of a date object
`setMinutes()`						Set the minutes of a date object
`setMonth()`						Sets the month of a date object
`setSeconds()`						Sets the seconds of a date object
`setTime()`						Sets a date to a specified number of milliseconds after/before January 1, 1970
`setUTCDate()`						Sets the day of the month of a date object, according to universal time
`setUTCFullYear()`						Sets the year of a date object, according to universal time
`setUTCHours()`						Sets the hour of a date object, according to universal time
`setUTCMilliseconds()`						Sets the milliseconds of a date object, according to universal time
`setUTCMinutes()`						Set the minutes of a date object, according to universal time
`setUTCMonth()`						Sets the month of a date object, according to universal time
`setUTCSeconds()`						Set the seconds of a date object, according to universal time
~~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
toISOString()	ES5	ES5	ES5	ES5	9-11	Returns the date as a string, using the ISO standard
toJSON()	ES5	ES5	ES5	ES5	9-11	Returns the date as a string, formatted as a JSON date
`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 since midnight of January 1, 1970, according to UTC time
`valueOf()`						Returns the primitive value of a Date object

Global

Name	Chrome	Edge	Firefox	Safari	IE	desc
`decodeURI()`	ES1	ES1	ES1	ES1	ES1	Decodes a URI
`decodeURIComponent()`						Decodes a URI component
`encodeURI()`						Encodes a URI
`encodeURIComponent()`						Encodes a URI component
~~escape()~~						Deprecated. Use instead: `encodeURI()` `encodeURIComponent()`
`eval()`						Evaluates a string and executes it as if it was script code
`Infinity`						A numeric value that represents positive/negative infinity
`isFinite()`						Determines whether a value is a finite, legal number
`isNaN()`						Determines whether a value is an illegal number
`NaN`						"Not-a-Number" value
`Number()`						Converts an object's value to a number
`parseFloat()`						Parses a string and returns a floating point number
`parseInt()`						Parses a string and returns an integer
`String()`						Converts an object's value to a string
`undefined`						Indicates that a variable has not been assigned a value
~~unescape()~~						Deprecated. Use instead: `decodeURI()` `decodeURIComponent()`

JSON `parse` `stringify` ES5

Math

Name	Chrome	Edge	Firefox	Safari	IE	desc
`abs(x)`	ES1	ES1	ES1	ES1	ES1	Returns the absolute value of x
`acos(x)`						Returns the arccosine of x, in radians
`acosh(x)`						Returns the hyperbolic arccosine of x
`asin(x)`						Returns the arcsine of x, in radians
asinh(x)	ES6	ES6	ES6	ES6		Returns the hyperbolic arcsine of x
`atan(x)`						Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians
`atan2(y, x)`						Returns the arctangent of the quotient of its arguments
atanh(x)	ES6	ES6	ES6	ES6		Returns the hyperbolic arctangent of x
cbrt(x)	ES6	ES6	ES6	ES6		Returns the cubic root of x
`ceil(x)`						Returns x, rounded upwards to the nearest integer
clz32(x)	ES6	ES6	ES6	ES6		Returns the number of leading zeros in a 32-bit binary representation of x
`cos(x)`						Returns the cosine of x (x is in radians)
cosh(x)	ES6	ES6	ES6	ES6		Returns the hyperbolic cosine of x
`E`						Returns Euler's number (approx. 2.718)
`exp(x)`						Returns the value of Ex
expm1(x)	ES6	ES6	ES6	ES6		Returns the value of Ex minus 1
`floor(x)`						Returns x, rounded downwards to the nearest integer
fround(x)	ES6	ES6	ES6	ES6		Returns the nearest (32-bit single precision) float representation of a number
`LN2`						Returns the natural logarithm of 2 (approx. 0.693)
`LN10`						Returns the natural logarithm of 10 (approx. 2.302)
`log(x)`						Returns the natural logarithmof x
log10(x)	ES6	ES6	ES6	ES6		Returns the base-10 logarithm of x
`LOG10E`						Returns the base-10 logarithm of E (approx. 0.434)
log1p(x)	ES6	ES6	ES6	ES6		Returns the natural logarithm of 1 + x
log2(x)	ES6	ES6	ES6	ES6		Returns the base-2 logarithm of x
`LOG2E`						Returns the base-2 logarithm of E (approx. 1.442)
`max(x1,x2,..)`						Returns the number with the highest value
`min(x1,x2,..)`						Returns the number with the lowest value
`PI`						Returns PI (approx. 3.14)
`pow(x, y)`						Returns the value of x to the power of y
`random()`						Returns a random number between 0 and 1
`round(x)`						Rounds x to the nearest integer
sign(x)	ES6	ES6	ES6	ES6		Returns the sign of a number (checks whether it is positive, negative or zero)
`sin(x)`						Returns the sine of x (x is in radians)
sinh(x)	ES6	ES6	ES6	ES6		Returns the hyperbolic sine of x
`sqrt(x)`						Returns the square root of x
`SQRT1_2`						Returns the square root of 1/2 (approx. 0.707)
`SQRT2`						Returns the square root of 2 (approx. 1.414)
`tan(x)`						Returns the tangent of an angle
tanh(x)	ES6	ES6	ES6	ES6		Returns the hyperbolic tangent of a number
trunc(x)	ES6	ES6	ES6	ES6		Returns the integer part of a number (x)

Number

Name	Chrome	Edge	Firefox	Safari	IE	desc
`constructor`	ES1	ES1	ES1	ES1	ES1	Returns the function that created JavaScript's Number prototype
EPSILON	ES6	ES6	ES6	ES6		Returns the difference between 1 and the smallest number greater than 1
isFinite()	ES6	ES6	ES6	ES6		Checks whether a value is a finite number
isInteger()	ES6	ES6	ES6	ES6		Checks whether a value is an integer
isNaN()	ES6	ES6	ES6	ES6		Checks whether a value is Number.NaN
isSafeInteger()	ES6	ES6	ES6	ES6		Checks whether a value is a safe integer
MAX_SAFE_INTEGER	ES6	ES6	ES6	ES6		Returns the maximum safe integer in JavaScript.
MIN_SAFE_INTEGER	ES6	ES6	ES6	ES6		Returns the minimum safe integer in JavaScript
`MAX_VALUE`						Returns the largest number possible in JavaScript
`MIN_VALUE`						Returns the smallest number possible in JavaScript
`NaN`						Represents a "Not-a-Number" value
`NEGATIVE_INFINITY`						Represents negative infinity (returned on overflow)
`POSITIVE_INFINITY`						Represents infinity (returned on overflow)
parseFloat()	ES6	ES6	ES6	ES6		Parses a string an returns a number
parseInt()	ES6	ES6	ES6	ES6		Parses a string an returns a whole number
`prototype`						Allows you to add properties and methods to an object
toExponential(x)	ES3	ES3	ES3	ES3	ES3	Converts a number into an exponential notation
toFixed(x)	ES3	ES3	ES3	ES3	ES3	Formats a number with x numbers of digits after the decimal point
toLocaleString()	ES3	ES3	ES3	ES3	ES3	Converts a number into a string, based on the locale settings, `(locales, options)` >= IE11
toPrecision(x)	ES3	ES3	ES3	ES3	ES3	Formats a number to x length
`toString()`						Converts a number to a string
`valueOf()`						Returns the primitive value of a number

Object

Name	Chrome	Edge	Firefox	Safari	IE	desc
`constructor`	ES1	ES1	ES1	ES1	ES1	Returns the function that created an object's prototype
keys()	ES6	ES6	ES6	ES6		Returns an Array Iterator object with the keys of an object
`prototype`						Let you to add properties and methods to JavaScript objects
`toString()`						Converts an object to a string and returns the result
`valueOf()`						Returns the primitive value of an object

String

Name	Chrome	Edge	Firefox	Safari	IE	desc
`charAt()`	ES1	ES1	ES1	ES1	ES1	Returns the character at a specified index (position)
`charCodeAt()`						Returns the UTF-16 of the character at a specified index(0-65535)
codePointAt()	ES6	ES6	ES6	ES6		Returns the Unicode of the character at a specified index
`concat()`						Returns two or more joined strings
`constructor`						Returns the string's constructor function
endsWith()	ES6	ES6	ES6	ES6		Returns if a string ends with a specified value
`fromCharCode()`						Returns Unicode values as characters
includes()	ES6	ES6	ES6	ES6		Returns if a string contains a specified value
`indexOf()`						Returns the index (position) of the first occurrence of a value in a string
`lastIndexOf()`						Returns the index (position) of the last occurrence of a value in a string
`length`						Returns the length of a string
`localeCompare()`						Compares two strings in the current locale(returns sort order -1, 1, or 0)
`match()`						Searches a string for a value, or a regular expression, and returns the matches
`prototype`						Allows you to add properties and methods to an object
repeat()	ES6	ES6	ES6	ES6		Returns a new string with a number of copies of a string
`replace()`						Searches a string for a value, or a regular expression, and returns a string where the values are replaced
`search()`						Searches a string for a value, or regular expression, and returns the index (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
startsWith()	ES6	ES6	ES6	ES6		Checks whether a string begins with specified characters
`substr()`						Extracts a number of characters from a string, from a start index (position)
`substring()`						Extracts characters from a string, between two specified indices (positions)
`toLocaleLowerCase()`						Returns a string converted to lowercase letters, using the host's locale
`toLocaleUpperCase()`						Returns a string converted to uppercase letters, using the host's locale
`toLowerCase()`						Returns a string converted to lowercase letters
`toString()`						Returns a string or a string object as a string
`toUpperCase()`						Returns a string converted to uppercase letters
trim()	ES5	ES5	ES5	ES5	9-11	Returns a string with removed whitespaces
trimEnd()	v66, Apr 2018	v79, Jan 2020	v61, Sep 2018	v12, Sep 2018		Returns a string with removed whitespaces from the end
trimStart()	v66, Apr 2018	v79, Jan 2020	v61, Sep 2018	v12, Sep 2018		Returns a string with removed whitespaces from the start
`valueOf()`						Returns the primitive value of a string or a string object

Secrets of the Javascript Ninja

Page Source

Javascript browser support

ECMA-262 Specification

version

NodeJS ES20215 support

Array

Class

Date

Global

JSON parse stringify ES5

Math

Number

Object

String

Secrets of the Javascript Ninja

JSON `parse` `stringify` ES5