March 2019 web platform update
Now widely available on the web platform
Widely available
-
Array copyWithin(): The
copyWithin()
method of arrays and typed arrays shifts or copies items of an array to another index of the array without changing its length. Learn more. -
Array fill(): The
fill()
method of arrays and typed arrays sets all or some items of an array to a given a value. Learn more. -
Array find() and findIndex(): The
find()
andfindIndex()
methods of arrays and typed arrays search an array for the first item that satisfies a test function. Learn more. -
Array.from(): The
Array.from()
and typed array.from()
static methods copy items from an iterable or array-like object to make a new array. Learn more. -
Array includes(): The
includes()
method of arrays and typed arrays returns whether a given value appears in the array. Learn more. -
Array.of(): The
Array.of()
and typed array.of()
static methods create new arrays from the values of any number of arguments. Learn more. -
background-repeat: The
background-repeat
CSS property sets how a background image is tiled. Learn more. -
@font-face: The
@font-face
CSS at-rule creates a customfont-family
value. The at-rule's descriptors set the font's name, source, and various display settings. Learn more. -
Generators: Generator functions (
function*
) create iterators that return multiple values, one after another, on-demand. Learn more. -
Proxy and Reflect: The
Proxy
andReflect
JavaScript built-ins intercept and define custom behavior for fundamental language operations (such as property lookup, assignment, enumeration, or function invocation). Learn more. -
String normalize(): The
normalize()
method of strings returns a Unicode normal form of a string as a new string. More than one code point sequence can represent the same characters. You can use thenormalize()
method to find canonically or compatibly equivalent strings. Learn more. -
Typed array iteration methods: Typed array iteration methods Learn more.
-
Typed array iterators: Typed arrays are iterable with the
for … of
statement and enumerable with the methodsentries()
,keys()
, andvalues()
. Learn more.
Newly available on the web platform
Newly available
-
Abortable fetch: If you construct a fetch request with an
AbortSignal
, you can cancel the request. Learn more. -
AbortController and AbortSignal: The
AbortController
andAbortSignal
APIs allow you to cancel an ongoing operation, such as afetch()
request. Learn more. -
Intersection observer: The Intersection Observer API asynchronously observes changes in the intersection of a target element with an ancestor element or with a top-level document's viewport. Learn more.