for in loops over enumerable property names of an object. for of (new in ES6) does use an object-specific iterator and loops over the values generated by that. In your example, the array iterator does yield all the values in the array (ignoring non-index properties).

Nov 20, 2024 · The for..in loop is designed for iterating over an object’s keys or property names, making it useful when accessing each property in an object. Although it can also be used to iterate over the indices of an array. Conversely, the for..of loop is intended to iterate directly over values in iterable collections like arrays, strings, Maps, or Sets.

Dec 29, 2014 · for (... in ...) is typically used to iterate through the properties of objects (which are what javaScript uses for associative arrays), while the typical for loop is used for sequential arrays.

Feb 20, 2019 · Generally, for/of is the most robust way to iterate over an array in JavaScript. It is more concise than a conventional for loop and doesn't have as many edge cases as for/in and forEach().

Jul 12, 2023 · Both for...in and for...of are used to loop over elements in an iterable object, like an array, string, or object. While they may seem similar, they have some key differences. for...in is used to...

In this in-depth exploration, we’ve dissected the differences between JavaScript’s for…in, for…of, and forEach loops. Understanding when and how to use these loops is essential for efficient coding and data manipulation in JavaScript.

Feb 4, 2021 · In this article, I am explaining the differences between the four for loops in JavaScript. The best use for these loops is as follows: For arrays, use for...of (or forEach). If you work...

Learn the key differences between for...in and for...of loops in JavaScript, including their syntax, use cases, and examples.

Oct 12, 2023 · This tutorial educates about the difference between JavaScript for..in and for..of loop. It also highlights where to use for..in or for..of loop.

Sep 2, 2023 · The for...in loop is used to iterate over the keys of an object, while the for...of loop is used to iterate over the values of an iterable object, such as an array.