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DataView.prototype.setBigUint64()

The setBigUint64() method of DataView instances takes a BigInt and stores it as a 64-bit unsigned integer in the 8 bytes starting at the specified byte offset of this DataView. There is no alignment constraint; multi-byte values may be stored at any offset within bounds.

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Syntax

setBigUint64(byteOffset, value)
setBigUint64(byteOffset, value, littleEndian)

Parameters

byteOffset: The offset, in bytes, from the start of the view to store the data in.
value: The value to set as a BigInt. For how the value is encoded in bytes, see Value encoding and normalization.
littleEndian Optional: Indicates whether the data is stored in little- or big-endian format. If false or undefined, a big-endian value is written.

Return value

undefined.

Exceptions

RangeError: Thrown if the byteOffset is set such that it would store beyond the end of the view.

Examples

Using setBigUint64()

const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setBigUint64(0, 3n);
dataview.getBigUint64(1); // 768n

Specifications

Specification
ECMAScript Language Specification # sec-dataview.prototype.setbiguint64

Browser compatibility

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`setBigUint64`	67	79	68	54	15	67	68	48	15	9.0	67	1.0	10.4.0