JavaScript Array entries() Method method returns a new Array Iterator object with key/value pairs. This method does not change the original array.
array.entries()JavaScript Array entries()
A simple example code creates an Array Iterator, and then iterates over the key/value pairs:
<!DOCTYPE html>
<html>
<body>
<script>
let words = ["Apple", "Ball", "Cat", "Dog"];
const w = words.entries();
console.log(w)
for (let x of w) {
console.log(x)
}
</script>
</body>
</html>Output:
More examples
const array1 = ['a', 'b', 'c'];
const iterator1 = array1.entries();
console.log(iterator1.next().value); //[0, "a"]
console.log(iterator1.next().value);// [1, "b"]Iterating with index and element
const a = ["a", "b", "c"];
for (const [index, element] of a.entries()) {
console.log(index, element);
}Using a for…of loop
const array = ["a", "b", "c"];
const arrayEntries = array.entries();
for (const element of arrayEntries) {
console.log(element);
}Do comment if you have any doubts or suggestions on this JS Array method tutorial.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version