The Javascript DataView setBigInt64() method stores a signed 64-bit integer value at the specified byte offset into the DataView.
dataview.setBigInt64(byteOffset, value [, littleEndian])
byteOffset
- the offset, in bytes, from the start of the view to store the data.value
- the value to set as a BigInt. littleEndian
- Optional, boolean value. If false or undefined, a big-endian value is written. Otherwise, store as little-endian.Using the setBigInt64 method
var buffer = new ArrayBuffer(8); var dataview = new DataView(buffer); dataview.setBigInt64(0, 3n);// w ww . j a va2 s . c om let a = dataview.getBigInt64(0); console.log(a);