在 Javascript 中为 Web 应用程序生成日志 [英] Generate logs for web application in Javascript

问题描述

我有一个用例，我想为我的 JS Web 应用程序生成日志，该日志可以作为文件存储在客户端(存储在用户的机器上).

I have a use case in which I would like to generate logs for my JS web application, which could be stored as a file on the client-side (stored on the user's machine).

因此，我想知道在JS中生成日志可以采用什么方法?

Therefore, I want to know that what approach can I follow for generating logs in JS?

推荐答案

如果你的意思是你想从浏览器托管的 JavaScript 代码中做到这一点，恐怕你不能.基于浏览器的 JavaScript 代码无法写入用户计算机上的任意文件.这将是一个巨大的安全问题.

If you mean you want to do this from browser-hosted JavaScript code, I'm afraid you can't. Browser-based JavaScript code can't write to arbitrary files on the user's computer. It would be a massive security problem.

你可以保留一个日志"在网络存储中，但请注意网络存储有大小限制所以你不会想让它变得太大.

You could keep a "log" in web storage, but note that web storage has size limits so you wouldn't want to let it grow too huge.

这是添加到本地存储日志的准系统日志记录功能:

Here's a barebones logging function that adds to a log in local storage:

function log(...msgs) {
    // Get the current log's text, or "" if there isn't any yet
    let text = localStorage.getItem("log") || "";
    // Add this "line" of log data
    text += msgs.join(" ") + "
";
    // Write it back to local storage
    localStorage.setItem("log", text);
}

显然，您可以通过多种不同的方式(日志级别、日期/时间日志记录等)在此基础上进行构建.

Obviously you can then build on that in a bunch of different ways (log levels, date/time logging, etc.).

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