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References

Array.copyWithin()

Array.findIndex()

Array.flatMap()

Array.forEach()

Array.includes()

Array.indexOf()

Array.isArray()

Array.lastIndexOf()

Array.reduceRight()

Array.reverse()

Array.toString()

Array.unshift()

Function.toString()

JSON.stringify()

Object.assign()

Object.create()

Object.defineProperties()

Object.defineProperty()

Object.entries()

Object.freeze()

Object.fromEntries()

Object.getOwnPropertyDescriptor()

Object.getOwnPropertyDescriptors()

Object.getOwnPropertyNames()

Object.getOwnPropertySymbols()

Object.getPrototypeOf()

Object.hasOwn()

Object.hasOwnProperty()

Object.isExtensible()

Object.isFrozen()

Object.isPrototypeOf()

Object.isSealed()

Object.preventExtensions()

Object.setPrototypeOf()

Object.toLocaleString()

Object.values()

Promise.allSettled()

Promise.finally()

String.charAt()

String.charCodeAt()

String.concat()

String.endsWith()

String.fromCodePoint()

String.includes()

String.indexOf()

String.lastIndexOf()

String.localeCompare()

String.matchAll()

String.padEnd()

String.padStart()

String.replace()

String.replaceAll()

String.search()

String.startsWith()

String.substring()

String.toLocaleLowerCase()

String.toLocaleUpperCase()

String.toLowerCase()

String.toString()

String.toUpperCase()

String.trimEnd()

String.trimStart()

String.valueOf()

Symbol.keyFor()

Object.getOwnPropertySymbols()

Leírás

Az Object.getOwnPropertySymbols használatával lekérheti az objektumon lévő összes szimbólum tömbjét.

Szintaxis

Object.getOwnPropertySymbols(obj)

Példa

const object1 = {}
const a = Symbol('a')
const b = Symbol.for('b')
 
object1[a] = 'localSymbol'
object1[b] = 'globalSymbol'
 
const objectSymbols = Object.getOwnPropertySymbols(object1)
 
console.log(objectSymbols.length)
// Expected output: 2

in this article

Leírás
Szintaxis
Példa

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