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Question

在终端中运行open http://localhost:8080每次都会打开一个新标签。

如果可用，create-react-app如何重用现有的“浏览器”标签？

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看起来here是神奇发生的地方：

function startBrowserProcess(browser, url) {
  // If we're on OS X, the user hasn't specifically
  // requested a different browser, we can try opening
  // Chrome with AppleScript. This lets us reuse an
  // existing tab when possible instead of creating a new one.
  const shouldTryOpenChromeWithAppleScript =
    process.platform === 'darwin' &&
    (typeof browser !== 'string' || browser === OSX_CHROME);

  if (shouldTryOpenChromeWithAppleScript) {
    try {
      // Try our best to reuse existing tab
      // on OS X Google Chrome with AppleScript
      execSync('ps cax | grep "Google Chrome"');
      execSync('osascript openChrome.applescript "' + encodeURI(url) + '"', {
        cwd: __dirname,
        stdio: 'ignore',
      });
      return true;
    } catch (err) {
      // Ignore errors.
    }
  }

  // Another special case: on OS X, check if BROWSER has been set to "open".
  // In this case, instead of passing `open` to `opn` (which won't work),
  // just ignore it (thus ensuring the intended behavior, i.e. opening the system browser):
  // https://github.com/facebook/create-react-app/pull/1690#issuecomment-283518768
  if (process.platform === 'darwin' && browser === 'open') {
    browser = undefined;
  }

  // Fallback to opn
  // (It will always open new tab)
  try {
    var options = { app: browser };
    opn(url, options).catch(() => {}); // Prevent `unhandledRejection` error.
    return true;
  } catch (err) {
    return false;
  }
}

但是，我仍然不知道这是如何运作的。我在OS X上，我确实有osascript二进制文件。但我不确定如何在终端内使用它。

我已尝试osascript openChrome.applescript "localhost:8080"，但我收到以下错误：

osascript: openChrome.applescript: No such file or directory

正确使用osascript命令在当前标签中打开http://localhost:8080有什么用途？

更新

它看起来像openChrome.applescript文件is somewhere included within create-react-app，但我不知道在哪里。

Answer 1

我刚刚测试了osascript /path/to/openChrome.applescript "http://localhost:8080"，它按预期工作。

如果您没有 openChrome.applescript 脚本，那么这里的源代码网址：openChrome.applescript

运行`npm run start`后，create-react-app如何重用现有的Browser选项卡？

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1 个答案: