Map.prototype.entries()

map.entries()

Returns: Iterator · Updated March 13, 2026 · Map and Set

map entries iteration

The entries() method returns a new Map Iterator that yields [key, value] pairs in insertion order. Use Map.prototype.entries() when you want both the key and the value while iterating, or when you need to convert a map into an array of tuples.

Syntax

map.entries()

Return Value

Returns an iterator that produces [key, value] arrays for each entry in the map. The iterator object has a next() method that returns {done: false, value: [key, value]} until all entries are exhausted, then returns {done: true}.

Examples

Basic iteration

const scores = new Map([
  [alice, 12],
  [bob, 9]
]);

for (const [name, score] of scores.entries()) {
  console.log(`${name}: ${score}`);
}
// alice: 12
// bob: 9

Convert a map to an array

const settings = new Map([
  [theme, dark],
  [language, en]
]);

console.log([...settings.entries()]);
// [[theme, dark], [language, en]]

Manual iteration with next()

const ids = new Map([
  [first, 101],
  [second, 102]
]);

const iterator = ids.entries();

console.log(iterator.next().value);
// [first, 101]

console.log(iterator.next().value);
// [second, 102]

Using with Array methods

const products = new Map([
  [apple, 1.50],
  [banana, 0.75]
]);

const expensive = [...products.entries()]
  .filter(([name, price]) => price > 1.00);

console.log(expensive);
// [[apple, 1.50]]