JavaScript Array shift() Method Last Updated : 18 Sep, 2024 Comments Improve Suggest changes Like Article Like Report The shift() method in JavaScript is used to remove the first element of an array, reducing the array's length by one. This method is particularly useful for scenarios where elements need to be processed in the order they were added, such as in queue-like structures.Syntax:arr.shift();Parameters: This method does not accept any parameter.Return Value: This function returns the removed first element of the array. If the array is empty then this function returns undefined.Note: This function can also be used with other javascript objects that behave like the array.Key PointsThe shift() method modifies the original array.It can be used with other JavaScript objects that behave like arrays (e.g., array-like objects).Indices of the remaining elements are adjusted, decrementing by one to fill the gap left by the removed element.Examples of Array shift() MethodExample 1: Removing the First Element from the ArrayThe function func() removes the first element from array using the shift() method. The removed element is stored in the variable, value, which is then logged to the console along with the modified array. JavaScript // Original array let array = ["GFG", "Geeks", "for", "Geeks"]; // Checking for condition in array let value = array.shift(); console.log(value); console.log(array); OutputGFG [ 'Geeks', 'for', 'Geeks' ] Example 2: Removing First Element from Empty Array The function func() attempts to remove the first element from an empty array array using the shift() method. Since the array is empty, shift() returns undefined, which is logged to the console along with the unchanged array. JavaScript // Original array let array = []; // Checking for condition in array let value = array.shift(); console.log(value); console.log(array); Outputundefined [] Example 3: Removing the First Element from the Nested ArrayThe function func() removes the first element from the nested array using the shift() method. The removed element is stored in the variable value, which is then logged to the console along with the modified array. JavaScript // Original array let array = [1,[2,3,4],5,6]; // shift method on nested array let value = array[1].shift(); console.log(value); console.log("Array after operation: "+ array); Output2 Array after operation: 1,3,4,5,6 Supported Browsers:Google Chrome 1 Edge 12 Firefox 1 Opera 4 Safari 1 Comment More infoAdvertise with us Next Article JavaScript Array shift() Method H HGaur Follow Improve Article Tags : Misc JavaScript Web Technologies javascript-array JavaScript-Methods +1 More Practice Tags : Misc Similar Reads JavaScript Array() Constructor The Array() constructor is used to create Array objects and the array constructor can be called with or without a new keyword, both can create a new Array.Syntax:new Array(Value1, Value2, ...);new Array(ArrayLength);Array(Value1, Value2, ...);Array(ArrayLength);Parameters: ValueN: An array initializ 2 min read JavaScript Array constructor Property The JavaScript Array constructor property is used to return the constructor function for an array object. 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