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NOTE: Negative input values to the slice() method parameters selects the elements from the end of an array. Onclick of the button " Return " in the HTML code fires the function myValue() in the block at the same time slice() method selects elements in an array as per the given input values and returns in an new array. In the above code snippet we have given negative input values to slice() method parameters. Select elements using negative input values JavaScript array is the most widely used data structure among JavaScript developers with a large variety of array manipulation library functions. Click the below to select the elements from the end. The positive input values to the slice() method parameters selects the elements from the start of an array.ĮXAMPLE: Returning the selected elements in an array by giving negative values to ' Start' and ' End' parameters. Syntax: arr.

NOTE: While counting the elements in an array, the count starts from zero ( 0). The Javascript arr.slice () method returns a new array containing a portion of the array on which it is implemented. You can always tell if a method will mutate by whether or not it returns a new array or object. (India= 0, Mumbai= 1, Pakistan= 2, Karachi= 3, Malaysia= 4, Abudhabi= 5) Using an array method like splice will cause the original array to be manipulated. In the above output we can notice that, the output includes the Start value ' 0', but does not includes the End value ' 4'

Onclick of the button " Return" in the HTML code fires the function myValue() in the block at the same time slice() method selects elements in an array as per the given input values and returns in an new array. We need to return the selected elements in an array, for that we are using slice() method, which is commonly called as ' Array Slice', and we are giving the values ' 0' and ' 4' to slice(0, 4) method, that means it returns from the element ' 0' (Zero is the starting number when we are counting the elements in an array) to element ' 3'. In the above code snippet we have given Id as " myId "to the second element in the HTML code. There is a function myValue() in the block which is connected to the onclick of the HTML button and array with value "" to the variable a. In JavaScript, array.slice() is a built-in function that returns a new array of selected/extracted elements from a given array. Var a = ĭocument.getElementById(" myId").innerHTML = b Click the below to show the select the city related to country.