from
Allocates a new Buffer
using an array
of bytes in the range 0
– 255
. Array entries outside that range will be truncated to fit into it.
import { Buffer } from 'node:buffer';
// Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
If array
is an Array
\-like object (that is, one with a length
property of type number
), it is treated as if it is an array, unless it is a Buffer
or a Uint8Array
. This means all other TypedArray
variants get treated as an Array
. To create a Buffer
from the bytes backing a TypedArray
, use Buffer.copyBytesFrom()
.
A TypeError
will be thrown if array
is not an Array
or another type appropriate for Buffer.from()
variants.
Buffer.from(array)
and Buffer.from(string)
may also use the internal Buffer
pool like Buffer.allocUnsafe()
does.
Since
v5.10.0
Creates a new Buffer using the passed {data}
Parameters
data to create a new Buffer
Creates a new Buffer containing the given JavaScript string {str}. If provided, the {encoding} parameter identifies the character encoding. If not provided, {encoding} defaults to 'utf8'.