The DataView.getUint8 method in JavaScript is a built-in function that retrieves an unsigned 8-bit integer (also known as an unsigned byte) from a designated position within the DataView.
Syntax
Example
dataview.getUint8(byteoffset)
Parameters
byteoffset: The position, measured in bytes, from the beginning of the view at which the data should be read.
Return value
This function yields an unsigned 8-bit integer value.
Browser Support
| Chrome | 9 |
|---|---|
| Safari | 5.1 |
| Firefox | 15 |
| Opera | 12.1 |
Example 1
Example
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var pyVisualizer = new ArrayBuffer(8);
// creating a view
var arr = new DataView(pyVisualizer);
// put the value 33.4 at slot 1
arr.setUint8(1,33.4);
document.write("Convert the Float value 33.4 to:<br><br>");
document.write(arr.getUint8(1));
//expected output: 33
</script>
Output:
Output
Convert the Float value 33.4 to:
33
Example 2
Example
<script>
//JavaScript to illustrate dataview.getUint8() method
// if there is no data to be stored then it returns Nan
// creating a ArrayBuffer
var pyVisualizer = new ArrayBuffer(10);
// creating a view
var arr = new DataView(pyVisualizer);
// NO Data
arr.setUint8(1);
document.write(" If there is no data to be stored, then Output will Be:<br><br>")
document.write(arr.getUint8(1));
//expected output: 0
</script>
Output:
Output
If there is no data to be stored, then Output will Be:
0
Example 3
Example
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var pyVisualizer = new ArrayBuffer(10);
// creating a view
var arr = new DataView(pyVisualizer);
//We can also use math function like Math.PI
arr.setUint8(1,Math.PI);
document.write("Convert the PI value 3.14 to <br><br>");
document.write(arr.getUint8(1));
//expected output: 3
</script>
Output:
Output
Convert the PI value 3.14 to
3
Example 4
Example
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var pyVisualizer = new ArrayBuffer(10);
// creating a view
var arr = new DataView(pyVisualizer);
// put the value 67 at slot 1
arr.setUint8(1,67);
document.write("If we give an Integer value then Output will be Integer<br><br>");
document.write(arr.getUint8(1));
//expected output: 67
</script>
Output:
Output
If we give an Integer value then Output will be Integer
67