javascript - 写入文本文件而不覆盖 fs Node js

Question

如何在文件中添加文本但不覆盖旧文本。我使用模块 fs (node js)

我试过这段代码，但它不起作用。

fs.writeFileSync("file.txt", 'Text', "UTF-8",{'flags': 'w+'});

任何建议，谢谢。

Answer 1

在此处检查标志:http://nodejs.org/api/fs.html#fs_fs_open_path_flags_mode_callback - 你目前正在使用 w+ 其中:

'w+' - Open file for reading and writing. The file is created (if it does not exist) or truncated (if it exists).

你应该使用 a 代替:

'a' - Open file for appending. The file is created if it does not exist.

'ax' - Like 'a' but opens the file in exclusive mode.

'a+' - Open file for reading and appending. The file is created if it does not exist.

'ax+' - Like 'a+' but opens the file in exclusive mode.