JavaScript | arrayBuffer.byteLength

The arrayBuffer.byteLength is a property in JavaScript which gives the length of an arrayBuffer in bytes.
Syntax:

ArrayBuffer.byteLength

Parameters: It doesn’t accept any parameter because arrayBuffer.byteLength is a property not a function.
Return Value: It returns the length of an arrayBuffer in bytes.

JavaScript code to show the working of the arrayBuffer.byteLength property:

Code #1:

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<script>
  
    // Creation of arrayBuffer of size 5 bytes
    var A = new ArrayBuffer(5);
  
    // Using property byteLength
    var bytes1 = A.byteLength;
  
    // Printing the lengths of the ArrayBuffer
    document.write(bytes1);
  
</script>

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Output:



5

Errors and Exception:

If length of arrayBuffer is given in fraction, it returns length in whole number and when length is given in the form of string then it returns length of zero (0).
Code #1:

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<script>
  
    // Creation of arrayBuffer of sizes 5.6
    var A = new ArrayBuffer(5.6);
  
   // Using property byteLength
   var bytes1 = A.byteLength;
  
   // Printing the length of the ArrayBuffer
   document.write(bytes1);
  
</script>

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Output:

5

Code #2:

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<script>
  
    // Creation of arrayBuffers of sizes "a" bytes
    var A = new ArrayBuffer("a");
  
    // Using property byteLength
    var bytes1 = A.byteLength;
  
    // Printing the length of the ArrayBuffer
    document.write(bytes1);
  
</script>

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Output:

0


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