This method is particularly useful when you have a lot of query string parameters. Date: 2016-11-15. If you have an object, you can’t just iterate it using map(), forEach() or a for..of loop. Only keys converted are: own property, enumerable, string keys. Let's see an example to add key and value pair of elements to map object. Return a map instance. What happens if you use numbers as keys? ; Use array methods on that array, e.g. There is no native map to the Object, but you can map the values using the following method. The pair consists of a unique key and a value mapped to the key. That's a job for Array.map. Version 2018-02-02 ] */ const xah_obj_to_map = … Transform objects of an array - Array.map. Output: jQuery AngularJS Bootstrap Example 2. In JavaScript, everything's a map. JavaScript map method is used to call a function on each element of an array to create a different array based on the outputs of the function. How to iterate over object properties in JavaScript Here's a very common task: iterating over an object properties, in JavaScript . Google Maps JavaScript API error: MissingKeyMapError; For web developers: If you have access to the source code of your application, look for the