In this article we will deal with this problem and learn 4 ways to loop through objects using javascript to retrieve multiple key-value pairs. This data can come in the form of arrays, lists, maps or other objects. Here is an example using Object.How to loop through objects keys and values in Javascript?Ī common problem faced by programers is looping over an enumerable dataset. With that said, if you just want to iterate through the values of an object using forEach then Object.values is perfect for it because it will provide all the values in a given object as an array that you can then loop through using. Using Object.values generally will have less use cases than the Object.entries or Object.keys because you can’t relate it to a key afterwards which means you can’t perform any further lookups. Using Object.values works in a similar way to Object.keys but instead of getting an array of the keys you get an array of the values from the object. The last way to convert an object into an array in JavaScript is to use the values in the object rather than key value pairs or the keys and we can do this with Object.values. Using Object.values with forEach in JavaScript forEach ( key => )Īs you can see this method of using Object.keys with forEach works because we get an array of all the keys in the object that when we iterate through using forEach we can use each key to perform a lookup on the original object to then get the value from as well. Here is an example of iterating in javascript foreach object with key value pairs: When we combine this with the forEach method it means we can then effectively use forEach with an Object for iterating through the keys and values of an object.
The best method to do this is by using Object.entries because the entries method will return the object properties as key value pairs in the form of an array.
In as few words as possible, to use forEach with an Object in JavaScript we need to convert the object into an array.
How to use forEach with an Object in JavaScript Let’s get started and look at how we can use forEach Object in JavaScript. If you want to find how to get the index in a forEach loop in JavaScript, I have a post here that shows how to in detail. The forEach method is a method attached to the Array object and is not an object method so to be able to use it with an object we are going to need to do some extra work to be able to perform a conversion of object to array in JavaScript first. It is possible to use with an object in JavaScript and that is exactly what we are going to look at doing in this post.
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