The JavaScript Array filter method to create a new array with desired items, a more advanced way to remove unwanted elements.There are different methods and techniques you can use to remove elements from JavaScript arrays:You will also learn some other ways you can remove elements from an array that may not be so obvious, like with JavaScript Array elements can be removed from the end of an array by setting the length property to a value less than the current value. React Key Concept. Using Splice to Remove Array Elements in JavaScript The splice method can be used to add or remove elements from an array. To remove duplicates from an array: First, convert an array of duplicates to a Set. Some performance test have also shown this to be the fastest technique, so maybe it is better than I originally thought!Removing JavaScript Array items is important to managing your data. See the following javascript array methods one by one to remove the duplicates from an array: 1: First Method – Set Object.

Depending on your use-case this could be as easy as using the built-in I'll also be explaining how to achieve this in other ways, like with the use of utility libraries that will handle it for you, or if you have to support older browsers like IE 8.To remove a particular element from an array in JavaScript we'll want to first find the location of the element and then remove it.Finding the location by value can be done with the Using this index value we will then want to actually remove the element, which we can do with the Keep in mind that this only removes the first occurrence of the given element. However the state which holds the list of ’s on the page is in the component. You can delete items from the end of an array using pop() , from the beginning using shift() , or from the middle using splice() functions. If you want to remove multiple items that match your criteria there is a glitch.As the items are removed from the array the index still increments and the next item after your matched value is skipped.The simple solution is to modify the above example to decrement the index variable so it does not skip the next item in the array.In the modified example I added 2 additional 5 values to the array.

The first argument specifies the location at which to begin adding or removing elements. You then use the index as the start element and remove just one element.This is a simple example where the elements are integers. EDIT: This question was answered almost nine years ago when there were not many useful built-in methods in the Array.prototype. It modifies the array on which it is invoked.If there are no elements, or the array length is 0, the method returns undefined.The splice method can be used to add or remove elements from an array. The new Set will implicitly remove duplicate elements. Get occassional tutorials, guides, and reviews in your inbox. Nor does it affect the indexes of subsequent elements. For example, maybe you want to remove all "people" objects from an array if they are under 21 years old:The Underscore utility library has a similar method as Lodash, called If you're project requires you to support old versions of Internet Explorer, specifically IE 8 in this case, then the To deal with this, one solution is to shim the method, as shown in According to the SO post, this is the implementation of Get occassional tutorials, guides, and jobs in your inbox. When the element is removed the remaining elements are shifted down.The shift method returns the element that has been removed, updates the indexes of remaining elements, and updates the length property. To remove duplicates from an array: First, convert an array of duplicates to a Set. The callback is triggered as the filter method iterates through the array elements. See the following example to illustrate this:Now running the same example code as above, we get the following:As you can see, both of the '3' elements are now removed from the array.With this being such a common use-case, most (if not all) of the utility libraries have a function to remove elements from an array.So, for example, here is how you'd remove the number 3:Notice that it has removed all instances of 3, which is the default behavior.However, this method is more useful when removing more complex elements, like objects. Learn the ins and outs of visualizing data in Python with popular libraries like Matplotlib, Seaborn, Bokeh, and more. By continuing, we'll assume you're cool with our cookie policy. You can add and remove array elements in different ways. 1) Remove duplicates from an array using a Set. Lodash provides a rich set of array manipulation methods, one being remove.The Lodash remove method works much like the array filter method, but sort of in reverse.