The setBigUint64() method is used to store an unsigned 64-bit integer (unsigned long long) value at the particular byte offset from the start of the DataView.
Syntax:
dataview.setBigUint64(byteOffset, val [, littleEndian])
Parameters: This method accepts two parameters as mentioned above and described below:
- byteOffset: This parameter specifies the offset, in bytes, from the start of the view to read the data.
- val: This parameter specifies the value to set as a BigUInt.
- littleEndian: It is an optional parameter. If it is true then indicates if the 64-bit int is stored in little- or big-endian format. If set to false or not-defined, then a big-endian value is read.
Return Value: This function returns undefined.
Example 1: In this example, the value set is 1234 at offset 0.
Javascript
<script> var buffer = new ArrayBuffer(8);
var dView = new DataView(buffer);
dView.setBigUint64(0, 1234n);
console.log(dView.getBigUint64(0));
</script> |
Output:
1234
Example 2: In this example, the value set is 12345678 at offset 6.
Javascript
<script> // Creating an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(32);
// Setting constant value
const val = 12345678n;
const dView = new DataView(buffer);
dView.setBigUint64(6, val);
console.log(dView.getBigUint64(6));
</script> |
Output:
12345678
We have a complete list of Javascript Boolean and Dataview Methods, to check those please go through Javascript Boolean and DataView Complete Reference article.
Supported Browsers:
- Chrome
- Edge
- Firefox
- Opera
- Safari