JavaScript | typedArray.includes() with Examples

The typedArray.includes() is an inbuilt function in JavaScript which is used to check whether a particular element is included by the given typedArray or not and accordingly it returns true and false.
Syntax:

typedarray.includes(Element, Index);

Parameters: It accepts two parameter which are specified below-

  • Element: It is the element which are being searched in the typedArray.
  • Index: It is the index of the element in the typedArray form where search should start. Its default value is zero (0) and it is optional.
  • Return value: It returns a boolean value true if the element is present in the given typedArray otherwise returns false.

    JavaScript code to show the working of this function:

    Code #1:

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    <script>
      
        // Creating some typedArrays
        const A = new Uint8Array([ 1, 2, 3, 4, 5 ]);
        const B = new Uint8Array([ 5, 10, 15, 20 ]);
        const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]);
        const D = new Uint8Array([ 1, 3, 5, 7, 9 ]);
      
        // Calling include() function
        a = A.includes(2)
        b = B.includes(15, 1)
        c = C.includes(6)
        d = D.includes(9, 1)
      
        // Printing true or false, either the element
        // is present in the typedArray or not
        document.write(a + "<br>");
        document.write(b + "<br>");
        document.write(c + "<br>");
        document.write(d);
      
    </script>

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    Output:

    true
    true
    true
    true

    Code #2:

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    <script>
      
        // Creating some typedArrays
        const A = new Uint8Array([ 1, 2, 3, 4, 5 ]);
        const B = new Uint8Array([ 5, 10, 15, 20 ]);
        const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]);
        const D = new Uint8Array([ 1, 3, 5, 7, 9 ]);
      
        // Calling include() function
        a = A.includes(6)
        b = B.includes(21, 1)
        c = C.includes(6, 4)
        d = D.includes(0)
      
        // Printing true or false, either the element
        // is present in the typedArray or not
        document.write(a + "<br>");
        document.write(b + "<br>");
        document.write(c + "<br>");
        document.write(d);
      
    </script>

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    Output:

    false
    false
    false
    false


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