Use the JavaScript Map entries() method to get a new map iterator. This method returns a new iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.
obj.entries() Map entries JavaScript
Simple example code.
<!DOCTYPE html>
<html>
<body>
<script >
const mapObj = new Map();
mapObj.set('0', 'foo');
mapObj.set(1, 'bar');
const iterator = mapObj.entries();
console.log(iterator)
console.log(iterator.next().value);
console.log(iterator.next().value);
</script>
</body>
</html>Output:
More example
var myObject = { 'a': 1, 'b': 2, 'c': 3 };
Object.keys(myObject).map(function(key, index) {
myObject[key] *= 2;
});
console.log(myObject);Output: { a: 2, b: 4, c: 6 }
for key value in object JavaScript
for (const [key, value] of Object.entries(object1)) {
console.log(`${key}: ${value}`);
}Do comment if you have any doubts or suggestions on this Js Map entries tutorial.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version