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ECMAScript 2015 (6th Edition) is the current version of the ECMAScript Language Specification standard. Commonly referred to as "ES6", it defines the standard for the
JavaScript implementation in
SpiderMonkey , the engine used in Firefox and other Mozilla applications.
The get
The
find() method returns a
value in the array, if an element in the array satisfies the provided testing function. Otherwise
undefined is returned.
The bind() this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called.
The PromisePromise represents a value which may be available now, or in the future, or never.
ECMAScript 5.1, an older version of the standard upon which JavaScript is based, was approved in June 2011.
The constructor method is a special method for creating and initializing an object created with a class.
The static keyword defines a static method for a class.
Default function parameters allow formal parameters to be initialized with default values if no value or undefined is passed.
The set
The function .name
The
Map object is a simple key/value map. Any value (both objects and
primitive values ) may be used as either a key or a value.
The Map[@@species] Map constructor.
The
Map .prototype property represents the prototype for the
Map constructor.
The
size accessor property returns the number of elements in a
Map object.
The
Number.EPSILON property represents the difference between one and the smallest value greater than one that can be represented as a
Number.
The
Number.isNaN() method determines whether the passed value is
NaN. It is a more robust version of the original, global
isNaN().
The Number.isSafeInteger()safe integer . A safe integer is an integer that
The Number.MAX_SAFE_INTEGER253 - 1).