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Use this method when you want to modify the objects in the same array instead of creating a new array. You can assign a value or create new values based on the existing properties. During each iteration, add a new property to the object.Use foreach() and iterate over the array elements.The data is lost once the browser window is closed.This section teaches you how to use the foreach() method to add a property to an array of objects.įorEach() applies the defined function once to each element in the array. The sessionStorage API stores items for as long as the browser window is open, including page reloads and restores. We’ll use the sessionStorage API to demonstrate saving objects for brevity. To save objects, replace myArray with something like myObject. convert JSON string to relevant object tItem('array', jsonArray) Ĭonst str = localStorage.getItem('array') save to localStorage using "array" as the key and jsonArray as the value convert array to JSON string using JSON.stringify()Ĭonst jsonArray = JSON.stringify(myArray) The code example below shows how the localStorage API is used to store arrays: const myArray = The localStorage API maintains browser storage even when the browser is closed and reopened. When items have been removed from storage, the storage can be cleared.When items are retrieved from storage, the JSON string is parsed using JSON.parse().Items are converted to a JSON string using JSON.stringify().The Web Storage API allows us to store items in a more intuitive way using two mechanisms: localStorage and sessionStorage. There are a couple of ways to save arrays and objects to browser storage. You’d like to save arrays and objects to browser storage using JavaScript as an alternative to using cookies.