Why Did the Default Hash Prefix Change in AngularJS 1.6?

Understanding the AngularJS URL Hash-Bang Prefix in Version 1.6

Upon returning to an AngularJS project, you may notice that your URLs have transitioned from using the hash prefix "#" to "#!/". Why has this change occurred?

New Hash Prefix with AngularJS 1.6

AngularJS 1.6 introduced a substantial change by updating the default hash prefix for URLs that utilize the hash-bang ($location.hashbang) URL format. This prefix now defaults to "!" instead of being an empty string. As a result, URLs that are not operating in HTML5 mode or on browsers without HTML5 support will exhibit the "!" prefix.

For instance, instead of "mydomain.com/#/a/b/c," the URL will display as "mydomain.com/#!/a/b/c."

Customizing the Hash Prefix

If you prefer the previous URL format without the "!" prefix, you can override the default setting in your application's configuration:

<code class="javascript">appModule.config(['$locationProvider', function($locationProvider) {
  $locationProvider.hashPrefix('');
}]);</code>

By adding this code, the hash-bang prefix will be removed from your URLs, reverting them to the "hash" notation (#) format.

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