buf.writeFloatBE(value[, offset])

• value <number> 要写入 buf 的数字。

  ¥value <number> Number to be written to buf.

• offset <integer> 开始写入之前要跳过的字节数。必须满足 0 <= offset <= buf.length - 4。默认值：0。

  ¥offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 4. Default: 0.

• 返回：<integer> offset 加上写入的字节数。

  ¥Returns: <integer> offset plus the number of bytes written.

将 value 作为大端序写入 buf 中指定的 offset。当 value 不是 JavaScript 数字时，则行为未定义。

¥Writes value to buf at the specified offset as big-endian. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(4);

buf.writeFloatBE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer 4f 4a fe bb>const { Buffer } = require('node:buffer');

const buf = Buffer.allocUnsafe(4);

buf.writeFloatBE(0xcafebabe, 0);

console.log(buf);
// Prints: <Buffer 4f 4a fe bb>拷贝