DataView.prototype.getBigInt64()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
The getBigInt64()
method of DataView
instances reads 8 bytes starting at the specified byte offset of this DataView
and interprets them as a 64-bit signed integer. There is no alignment constraint; multi-byte values may be fetched from any offset within bounds.
Try it
Syntax
getBigInt64(byteOffset)
getBigInt64(byteOffset, littleEndian)
Parameters
byteOffset
-
The offset, in bytes, from the start of the view to read the data from.
littleEndian
Optional-
Indicates whether the data is stored in little- or big-endian format. If
false
orundefined
, a big-endian value is read.
Return value
A BigInt
from -263 to 263-1, inclusive.
Exceptions
RangeError
-
Thrown if the
byteOffset
is set such that it would read beyond the end of the view.
Examples
Using getBigInt64()
const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getBigInt64(1)); // 72623859790382856n
Specifications
Specification |
---|
ECMAScript Language Specification # sec-dataview.prototype.getbigint64 |
Browser compatibility
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