Here is the basic syntax: slice(optional start parameter, optional end parameter) It is important to note that the slice() method does not alter the original array but instead creates a shallow copy. The slice() method can be used to create a copy of an array or return a portion of an array. How to use the slice() JavaScript array method In this article, I will walk you through how to use the slice() and splice() array methods using code examples. It takes 2 parameters, and both are optional.When you are first learning JavaScript, it might be difficult to know the difference between the slice() and splice() array methods. It divides a string into substrings and returns them as an array. Slice( ) and splice( ) methods are for arrays.

log ( months ) // adding by index, 5 elements removed log ( months ) // adding by index, no element removedĬonsole. splice ( 1, 0, 'Feb', 'March' ) Ĭonsole. Var months = // adding by index, no element removed

log ( months ) // removing by index and number of element Var months = // removing by indexĬonsole. Removing an element using splice method : Number of elements: number of element to remove Lets see how to add and remove elements with splice( ):Īrray. The splice( ) method changes an array, by adding or removing elements from it. The name of this function is very similar to slice( ). slice ( 2, 4 )) // Extract array element from index 1 and n-1 indexĬonsole. slice ( 2 )) // Extract array element from index 2 and n-1 indexĬonsole. Var employeeName = // Extract array element from index-2Ĭonsole. Lets see the below example for slice method : Until: Slice the array until another element index It doesn’t change the original array.įrom: Slice the array starting from an element index The slice( ) method copies a given part of an array and returns that copied part as a new array.

Node js array slice