ECMAScript versions Flashcards by Martin Doyle

async/await

ES2017/ES8

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** operator

ES2016/ES7

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Object.entries()

ES2017/ES8

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Array.prototype.lastIndexOf()

ES5

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arrow functions

ES2015/ES6

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Array.prototype.values()

ES2015/ES6

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String.prototype.trim()

ES5

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BigInt

ES2020/ES11

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WeakMap

ES2015/ES6

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Proxy

ES2015/ES6

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Map

ES2015/ES6

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Array.prototype.entries()

ES2015/ES6

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super keyword

ES2015/ES6

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dynamic property names

ES2015/ES6

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Array.prototype.flat()

ES2019/ES10

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block-level function declaration

ES2015/ES6

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Object.getPrototypeOf()

ES5

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Object.assign()

ES2015/ES6

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Object.defineProperties()

ES5

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Array.prototype.findIndex()

ES2015/ES6

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String.prototype.startsWith()

ES2015/ES6

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Promise.allSettled()

ES2020/ES11

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Array.prototype.filter()

ES5

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Object setters

ES5

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String.prototype.trimEnd()

ES2019/ES10

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strict mode

ES5

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Array.prototype.reduce()

ES5

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template literals

ES2015/ES6

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Array.isArray()

ES5

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Array.prototype.reduceRight()

ES5

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Object.create()

ES5

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Object.freeze()

ES5

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for..of

ES2015/ES6

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Set

ES2015/ES6

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WeakSet

ES2015/ES6

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Optional catch binding

ES2019/ES10

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Array.prototype.keys()

ES2015/ES6

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nullish coalescing

ES2020/ES11

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Number.isInteger()

ES2015/ES6

Array.prototype.map()

ES5

Array rest

ES2015/ES6

Object.defineProperty()

ES5

String.prototype.trimStart()

ES2019/ES10

Array.prototype.some()

ES5

String.prototype.endsWith()

ES2015/ES6

RegExp named capture groups

ES2018/ES9

Default function params

ES2015/ES6

Destructuring

ES2015/ES6

optional chaining

ES2020/ES11

classes

ES2015/ES6

Trailing commas in arrays

Always

Object.values()

ES2017/ES8

Array.prototype.find()

ES2015/ES6

Spread iterables

ES2015/ES6

generators

ES2015/ES6

Trailing commas in function arguments

ES2017/ES8

Array.from()

ES2015/ES6

Function rest parameters

ES2015/ES6

destructuring (objects and iterables)

ES2015/ES6

String.prototype.repeat()

ES2015/ES6

Object.fromEntries()

ES2019/ES10

Array.prototype.fill()

ES2015/ES6

Async iterators

ES2018/ES9

Immutable globals (undefined, NaN, Infinity)

ES5

Object.getOwnPropertyNames()

ES5

Object getters

ES5

Array.prototype.forEach()

ES5

Number.MIN_SAFE_INTEGER

ES2015/ES6

Date.now()

ES5

shorthand property names

ES2015/ES6

Trailing commas in objects

ES5

Array.prototype.indexOf()

ES5

String.prototype.padStart()

ES2017/ES8

Nested destructuring

ES2016/ES7

Promise

ES2015/ES6

typed arrays

ES2015/ES6

Promise.prototype.finally()

ES2018/ES9

RegExp lookbehind assertion

ES2018/ES9

globalThis

ES2020/ES11

Object.keys()

ES5

Number.parseInt()

ES2015/ES6

Symbol

ES2015/ES6

Object.seal()

ES5

Array.prototype.includes()

ES2016/ES7

Object rest/spread

ES2018/ES9

String.prototype.trimLeft()

ES2019/ES10

Array.prototype.every()

ES5

const/let

ES2015/ES6

Number.isFinite()

ES2015/ES6

Number.isNaN()

ES2015/ES6

Number.MAX_SAFE_INTEGER

ES2015/ES6

String.prototype.padEnd()

ES2017/ES8

String.prototype.trimRight()

ES2019/ES10

Array.prototype.flatMap()

ES2019/ES10

String.prototype.includes()

ES2015/ES6

Date.prototype.toISOString()

ES5

Function.prototype.bind()

ES5

Brainscape's Knowledge GenomeTM

ECMAScript versions Flashcards

Brainscape's Knowledge Genome^TM