JavaScript Array splice Method

Suppose, you have an array scores that contains five numbers from 1 to 5. JavaScript Full Stack Developer currently working with fullstack JS using React and Express. Nathan loves to write about his experience in programming to help other people. Connect and share knowledge within a single location that is structured and easy to search. Please use, generate link and share the link here. The JavaScript Tutorial website helps you learn JavaScript programming from scratch quickly and effectively. The following statement replaces the second element by a new one.

Is there a limit on Splice?

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JavaScript Arraytype provides a very powerful splice() method that allows you to insert new elements into the middle of an array. However, you can use this method to delete and replace existing elements as well. If the specified number of elements to insert differs from the number of elements being removed, the array’s length will be changed as well. At the same time, it uses @@species to create a new array instance to be returned.

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If deleteCount is omitted or is greater than the number of elements left in the array, it deletes all elements from start to end of the array. If you do not specify any elements, splice() will only remove elements from the array. An integer indicating the number of elements in the array to remove from start. If negative, it will begin that many elements from the end of the array.


You can choose whether to store the returned empty array to a variable or not. The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place. To access part of an array without modifying it, see slice(). Javascript array splice() method changes the content of an array, adding new elements while removing old elements.

The position specifies the starting position in the array that the new elements will be inserted. You can insert one or more elements into an array by passing three or more arguments to the splice() method with the second argument is zero. The following statement deletes three elements of the scores array starting from the first element. If deleteCount is 0 or negative, no elements are removed. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

Arrays & Data Structures

The splice() method returns an array by changing (adding/removing) its elements in place. The splice() method is a built-in method for JavaScript Array objects. It lets you change the content of your array by removing or replacing existing elements with new ones. Splice() method changes the content of an array, adding new elements while removing old elements. If greater than the length of the array, start will be set to the length of the array. In this case, no element will be deleted but the method will behave as an adding function, adding as many elements as items provided. The splice() method allows you to insert new elements into an array while deleting existing elements simultaneously.

Article was published on: 10/5/22

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