Map.prototype.entries() - JavaScript 编辑

The entries() method returns a new Iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Syntax

myMap.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 (ECMA-262) The definition of 'Map.prototype.entries' in that specification.

Browser compatibility

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See also

• Map.prototype.keys()
• Map.prototype.values()