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The following method not returning any value (true or false). \Drupal::service('path.matcher')->isFrontPage();

How to check if the page is front or not?

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    Your snippet should actually just give you what you want. Maybe you need to wrap it with a try&catch, see drupal.stackexchange.com/a/204203/15055. Or you maybe need some cache buster strategy as suggested by @Andy in the comments to @Kevin's answer below. Where exactly do you call that snippet from?
    – leymannx
    Aug 3, 2018 at 19:02
  • The line you are showing is correct, but there could be errors in the rest of the code. Since you aren't showing the rest of the code, we cannot tell you what is wrong, except that it is not the line you are showing, as the answers for the other question make clear.
    – apaderno ♦
    Aug 3, 2018 at 20:55
  • @kiamlaluno I am trying to use it in .module file . I am using it inside hook_page_attachments. For debugging purpose i am using die() statement on next line . $is_front = \Drupal::service('path.matcher')->isFrontPage(); //print($is_front); die();
    – Aditya Joshi
    Aug 6, 2018 at 19:43

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This is indeed a way to check if it is the front page and should return a value if you check the method code.

I am using it in a few preprocess hooks:

$variables['is_front'] = \Drupal::service('path.matcher')->isFrontPage();
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    If you do that, I think the url.path.is_front cache context should be added.
    – Andy
    Aug 3, 2018 at 18:21
  • @Andy – Interested in how that would like like then I am.
    – leymannx
    Aug 3, 2018 at 18:53
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    @leymannx I believe in a theme preprocess you can set #cache and #attached on the variables array, see ThemeManager::render() - if that answers your Q? ie $variables['#cache']['contexts'][] = 'url.path.is_front';
    – Andy
    Aug 3, 2018 at 19:06
  • @Andy – Yeah, thanks for sharing! Will keep it in my valuable little Drupal gems box :)
    – leymannx
    Aug 3, 2018 at 19:11
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  • Twig : You can use {% if is_front %}. here is an example page.html.twig
  • PHP: \Drupal::service('path.matcher')->isFrontPage();
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