Array copyWithin()

The copyWithin() method copies part of an array to the same array and returns it, without modifying its.

Syntax:

list.copyWithin(target[, start[, end]])

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Field of application: When we need to copy the contents of any directory to the same array at the same time, we use array.copyWithin () in javaScript.

The CopyWithin function is a variable method. The array length does not change.

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Examples

        var list = ["john", "alice", "oliver", "sasha"];
        console.log(list.copyWithin(0,1))

output:
[“alice”, “oliver”, “sasha”, “sasha”]

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        var list = ["john", "alice", "oliver", "sasha"];
        console.log(list.copyWithin(1,2))

output:
[“john”, “oliver”, “sasha”, “sasha”]

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        var list = ["john", "alice", "oliver", "sasha"];
        console.log(list.copyWithin(2,3))

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output:
[“john”, “alice”, “sasha”, “sasha”]