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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

js
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

Exceptions

RangeError

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

Examples

Using setBigUint64()

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

Specifications

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

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView/setBigUint64