There's no JavaScript "command" that allows you to do this. Select a random item from an array in JavaScript. We can also use the Javascript Set and Javascript array from() method to get unique values. If you want 9 random elements from a 10 element array, it will surely be faster to shuffle than to extract 9 random elements one after the other. Select a random item from an array in JavaScript Description. Thus, typescript warns you that an array cannot be cast to T, which could be some subclass of an array. In the above program, a random item from an array is accessed. That depends on the percentage of random items required from the array. An integer that specifies where to end the selection. If omitted, all elements from the start position and to the end of the array will be selected. If the percentage this is useful for is less than 50%, then there are use cases where this solution is the fastest. 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