Map.prototype.entries()
The entries()
method returns a new
iterator object
that contains the [key, value]
pairs for each element in the Map
object in
insertion order. In this particular case, this iterator object is also an
iterable, so the for-of loop can be used. When the protocol [Symbol.iterator]
is used, it returns a function that, when invoked, returns this iterator itself.
Syntax
entries()
Return value
A new Map
iterator object.
Examples
Using entries()
let myMap = new Map()
myMap.set('0', 'foo')
myMap.set(1, 'bar')
myMap.set({}, 'baz')
let mapIter = myMap.entries()
console.log(mapIter.next().value) // ["0", "foo"]
console.log(mapIter.next().value) // [1, "bar"]
console.log(mapIter.next().value) // [Object, "baz"]
Specifications
Specification |
---|
ECMAScript Language Specification # sec-map.prototype.entries |
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