检测stdout光标是否在新行的开头

import sys

def is_cursor_at_newline():
    # 获取当前光标位置
    cursor_pos = sys.stdout.tell()
    # 将光标移动到行尾
    sys.stdout.write('\r')
    sys.stdout.flush()
    end_of_line_pos = sys.stdout.tell()
    # 将光标移回原位置
    sys.stdout.seek(cursor_pos)
    return cursor_pos == end_of_line_pos

if is_cursor_at_newline():
    print("Cursor is at the beginning of a new line.")
else:
    print("Cursor is not at the beginning of a new line.")

const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

rl.on('line', (input) => {
    console.log('Cursor is at the beginning of a new line.');
});