### Set Initial Meta Robots Tag (JavaScript)

Source: https://ngrx.io/docs/index

This script dynamically creates and appends a meta tag with the name 'robots' and content 'noindex' to the document's head. This is intended as a temporary measure, with the tag expected to be removed later when the page content is ready and validated.

```javascript
var tag = document.createElement('meta');
tag.name = 'robots';
tag.content = 'noindex';
document.head.appendChild(tag);
```

--------------------------------

### Configure Google Analytics Tracking (JavaScript)

Source: https://ngrx.io/docs/index

This snippet configures Google Analytics for tracking website usage. It dynamically loads the analytics script and defines a global function `ga` for sending data. It includes a check to prevent loading during e2e tests.

```javascript
window.ga = window.ga || function(){
  (window.ga.q = window.ga.q || []).push(arguments)
};
window.ga.l = 1*new Date();
var script = document.createElement('script');
var firstScript = document.getElementsByTagName('script')[0];
script.async = 1;
script.src = 'https://www.google-analytics.com/analytics.js';
// only load library if not running e2e tests
if (!~window.name.indexOf('NG_DEFER_BOOTSTRAP')) {
  firstScript.parentNode.insertBefore(script, firstScript);
}
```

--------------------------------

### Error Reporting to Google Analytics (JavaScript)

Source: https://ngrx.io/docs/index

This JavaScript code sets up a global error handler (`window.onerror`) to capture and report unhandled exceptions to Google Analytics. It formats the error details, including stack traces, to provide a concise description for reporting.

```javascript
window.onerror = function() {
  ga('send', 'exception', {exDescription: formatError.apply(null, arguments), exFatal: true});

  function formatError(msg, url, line, col, e) {
    var stack;
    msg = msg.replace(/^Error: /, '');
    if (e) {
      stack = e.stack
          // strip the leading "Error: " from the stack trace
          .replace(/^Error: /, '')
          // strip the message from the stack trace, if present
          .replace(msg + '\n', '')
          // strip leading spaces
          .replace(/^ +/gm, '')
          // strip all leading "at " for each frame
          .replace(/^at /gm, '')
          // replace long urls with just the last segment: `filename:line:column`
          .replace(/(?: \(|@)http.+\/([^/)]+)\)?(?:\n|$)/gm, '@$1\n')
          // replace "eval code" in Edge
          .replace(/ *\(eval code(:\d+:\d+)\)(?:\n|$)/gm, '@???$1\n')
    } else {
      line = line || '?';
      col = col || '?';
      stack = url + ':' + line + ':' + col;
    }
    return (msg + '\n' + stack).substring(0, 150);
  }
};

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.