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JavaScript | typedArray.length() with Examples

  • Last Updated : 31 Jul, 2018
Geek Week

The typedArray.length is an inbuilt property in JavaScript which is used to return the length of the given typedArray.
Syntax:

typedArray.length

Parameters: It does not accept any parameter because it is a property not a function.
Return value: It returns the length of the given typedArray.

JavaScript code to show the working of this property:

Code #1:




<script>
  
  // Creating a typedArray with some elements
  var A = new Uint8Array([5, 10, 15, 15, 5, 20, 10]);
  var B = new Uint8Array([5, 10]);
  var C = new Uint8Array([5, 10, 15]);
  var D = new Uint8Array([5, 10, 15, 15, 5]);
  var E = new Uint8Array([5, 10, 15, 15, 5, 20]);
    
  // Calling length() function
  b = A.length     
  c = B.length    
  d = C.length  
  e = D.length
  f = E.length
    
    
  // Printing the length of the typedArray
  document.write(b +"<br>");
  document.write(c +"<br>");
  document.write(d +"<br>");
  document.write(e +"<br>");
  document.write(f +"<br>");
    
</script>

Output:

7
2
3
5
6

Code #2:




<script>
  
  // Creating some ArrayBuffer with a size in bytes
  const A = new ArrayBuffer(8);
  const B = new ArrayBuffer(6);
  const C = new ArrayBuffer(16);
  const D = new ArrayBuffer(32);
    
  // Creating some typedArray with the above sizes 
  // of the buffer
  const E = new Uint8Array(A);
  const F = new Uint8Array(B);
  const G = new Uint8Array(C);
  const H = new Uint8Array(D);
    
  // Calling length property
  a = E.length
  b = F.length
  c = G.length
  d = H.length
  
  // Printing the length of the typedArray
  document.write(a +"<br>");
  document.write(b +"<br>");
  document.write(c +"<br>");
  document.write(d);
    
</script>

Output:

8
6
16
32

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