Skip to content
Related Articles

Related Articles

Improve Article
JavaScript dataView.getUint8() Method
  • Last Updated : 16 Sep, 2020

Below is the example of the dataView.getUint8() Method.

  • Example:




    <script> 
    var buffer = new ArrayBuffer(20); 
    var dataview1 = new DataView(buffer, 0, 10); 
      
    dataview1.setUint8(1, 12); 
    document.write(dataview1.getUint8(1) + "<br>"); 
    </script> 
  • Output:
    12

The dataView.getUint8() is an inbuilt function in dataView which is used to get a unsigned 8-bit integer at the specified location i.e, at byte offset from the start of the dataView.

Syntax:

dataView.getUint8(byteOffset)

Parameters: It has parameter byteOffset which is offset in a byte and it says from the start of the view were to read the data.

Return value: It returns unsigned 8-bit integer.



Example 1:

Input: dataview1.setUint8(1, 56); 
       document.write(dataview1.getUint8(1)); 
Output: 56

Example 2:

Input: dataview1.setUint8(1, Math.PI); 
       document.write(dataview1.getUint8(1)); 
Output: 3

JavaScript code to show the working of this method:
Code #1:




<script>
  
   // Creating buffer with size in byte
   var buffer = new ArrayBuffer(20);
  
   // Creating a view
   var dataview1 = new DataView(buffer, 0, 10);
  
   // put the data 56 at slot 1
   dataview1.setUint8(1, 56);
  document.write(dataview1.getUint8(1) + "<br>");
     
</script>

Output:

56

Code #2:
This function convert the float value of PI from 3.14 to 3




<script>
  
   // Creating buffer with size in byte
   var buffer = new ArrayBuffer(20);
  
   // Creating a view with slot from o to 10
   var dataview1 = new DataView(buffer, 0, 10);
  
   // put the value of PI at slot 1
   dataview1.setUint8(1, Math.PI);
   document.write(dataview1.getUint8(1) + "<br>");
     
</script>

Output:

3

Code #3:
When there is no data to be stored, then it returns zero (0).




<script>
  
   // Creating buffer with size in byte
   var buffer = new ArrayBuffer(20);
  
   // Creating a view
   var dataview1 = new DataView(buffer, 0, 10);
  
   // putting no data at slot 1
   dataview1.setUint8(1);
   document.write(dataview1.getUint8(1) + "<br>");
     
</script>

Output:

0

Supported Browsers:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Apple Safari
  • Opera



My Personal Notes arrow_drop_up
Recommended Articles
Page :