The Object.entries() static method returns an array of a given object's own enumerable string-keyed property key-value pairs.
The Object.entries() static method returns an array of a given object's own enumerable string-keyed property key-value pairs.
const object1 = {
a: "some string",
b: 42,
};
for (const [key, value] of Object.entries(object1)) {
console.log(`${key}: ${value}`);
}
/ Expected output:
/ "a: some string"
/ "b: 42"
Object.entries(obj)
objAn object.
An array of the given object's own enumerable string-keyed property key-value pairs. Each key-value pair is an array with two elements: the first element is the property key (which is always a string), and the second element is the property value.
Object.entries() returns an array whose elements are arrays corresponding to the enumerable string-keyed property key-value pairs found directly upon object. This is the same as iterating with a for...in loop.
If you only need the property keys, use Object.values() instead.
const obj = { foo: "bar", baz: 42 };
console.log(Object.entries(obj)); / [ ['foo', 'bar'], ['baz', 42] ]
const arrayLike = { 0: "a", 1: "b", 2: "c" };
console.log(Object.entries(arrayLike)); / [ ['0', 'a'], ['1', 'b'], ['2', 'c'] ]
const randomKeyOrder = { 100: "a", 2: "b", 7: "c" };
console.log(Object.entries(randomKeyOrder)); / [ ['2', 'b'], ['7', 'c'], ['100', 'a'] ]
/ getFoo is a non-enumerable property
const myObj = Object.create(
{},
{
getFoo: {
value() {
return this.foo;
},
},
},
);
myObj.foo = "bar";
console.log(Object.entries(myObj)); / [ ['foo', 'bar'] ]
Non-object arguments are TypeError upfront. Only strings may have own enumerable properties, while all other primitives return an empty array.
/ Strings have indices as enumerable own properties
console.log(Object.entries("foo")); / [ ['0', 'f'], ['1', 'o'], ['2', 'o'] ]
/ Other primitives except undefined and null have no own properties
console.log(Object.entries(100)); / []
The Map:
const obj = { foo: "bar", baz: 42 };
const map = new Map(Object.entries(obj));
console.log(map); / Map(2) {"foo" => "bar", "baz" => 42}
Using array destructuring, you can iterate through objects easily.
/ Using for...of loop
const obj = { a: 5, b: 7, c: 9 };
for (const [key, value] of Object.entries(obj)) {
console.log(`${key} ${value}`); / "a 5", "b 7", "c 9"
}
/ Using array methods
Object.entries(obj).forEach(([key, value]) => {
console.log(`${key} ${value}`); / "a 5", "b 7", "c 9"
});
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-object.entries |