buf.writeFloatBE(value[, offset])

• value <number> 要写入 buf 的数字。
• offset <integer> 写入前要跳过的字节数。必须满足 0 <= offset <= buf.length - 4。默认值： 0。
• 返回：<integer> offset 加上写入的字节数。

将 value 以大端格式写入 buf 指定的 offset。当 value 不是 JavaScript 数字时，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