References

Array.at()

Array.concat()

Array.copyWithin()

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.is()

Object.isExtensible()

Object.isFrozen()

Object.isPrototypeOf()

Object.isSealed()

Object.keys()

Object.preventExtensions()

Object.seal()

Object.setPrototypeOf()

Object.toLocaleString()

String.fromCodePoint()

String.includes()

String.indexOf()

String.lastIndexOf()

String.localeCompare()

String.toLocaleLowerCase()

String.toLocaleUpperCase()

Object.keys()

Leírás

Az objektum felsorolható tulajdonságainak nevét tartalmazó tömb.

Szintaxis

Object.keys(obj)

Példa

const object1 = {
  a: 'somestring',
  b: 42,
  c: false,
}
 
console.log(Object.keys(object1))
// Expected output: Array ["a", "b", "c"]

in this article

Leírás
Szintaxis
Példa