静态方法：Buffer.from(string[, encoding])

¥Static method: Buffer.from(string[, encoding])

• string <string> 要编码的字符串。

  ¥string <string> A string to encode.

• encoding <string> string 的编码。默认值：'utf8'。

  ¥encoding <string> The encoding of string. Default: 'utf8'.

• 返回：<Buffer>

  ¥Returns: <Buffer>

创建包含 string 的新 Buffer。encoding 参数标识将 string 转换为字节时要使用的字符编码。

¥Creates a new Buffer containing string. The encoding parameter identifies the character encoding to be used when converting string into bytes.

import { Buffer } from 'node:buffer';

const buf1 = Buffer.from('this is a tést');
const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');

console.log(buf1.toString());
// Prints: this is a tést
console.log(buf2.toString());
// Prints: this is a tést
console.log(buf1.toString('latin1'));
// Prints: this is a téstconst { Buffer } = require('node:buffer');

const buf1 = Buffer.from('this is a tést');
const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');

console.log(buf1.toString());
// Prints: this is a tést
console.log(buf2.toString());
// Prints: this is a tést
console.log(buf1.toString('latin1'));
// Prints: this is a tést拷贝

如果 string 不是字符串或其他适用于 Buffer.from() 变体的类型，则将抛出 TypeError。

¥A TypeError will be thrown if string is not a string or another type appropriate for Buffer.from() variants.

Buffer.from(string) 也像 Buffer.allocUnsafe() 一样使用内部 Buffer 池。

¥Buffer.from(string) may also use the internal Buffer pool like Buffer.allocUnsafe() does.