JavascriptBlog.

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()

Symbol.keyFor()

Leírás

Visszatér az adott paraméter kulcsot adja vissza.

Szintaxis

Symbol.keyFor(sym)

Példa

// Global symbol
const globalSym = Symbol.for('foo')
 
console.log(Symbol.keyFor(globalSym))
// Expected output: "foo"
 
// Local symbol
const localSym = Symbol()
 
console.log(Symbol.keyFor(localSym))
// Expected output: undefined

in this article

Leírás
Szintaxis
Példa

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