运行“npm run start”后,create-react-app 如何重新使用现有的浏览器选项卡?

Rap*_*nah 4 javascript applescript

open http://localhost:8080每次在终端中运行都会打开一个新选项卡。

create-react-app 如何重用现有的浏览器选项卡(如果可用)?

更新

看起来这里是魔法发生的地方:

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;
  }
}
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但是,我仍然不知道这是如何工作的。我在 OS X 上,而且我确实有osascript二进制文件,令人惊讶。但我不确定如何在终端中使用它。

我试过了osascript openChrome.applescript "localhost:8080",但出现以下错误:

osascript: openChrome.applescript: No such file or directory

如果存在,在当前选项卡中osascript打开命令的正确用法是http://localhost:8080什么?

更新

看起来 openChrome.applescript 文件包含在 create-react-app 中的某个地方,但我不确定在哪里。

use*_*894 5

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

如果您没有openChrome.applescript 脚本,那么这里是它的源代码 URLopenChrome.applescript