I got very strange issue with Magento 2 and custom css files. I'm trying to add custom css to the head

    <link src="js/bundle.js"/>
    <css src="css/main.css" />

After I flush cache, do deploy and than I see all css files in


except of main.css

I tried to deploy in developer/default mode, did Di compile, guess everything. What I do wrong?


I am sharing my cutom module files , it working

Link your css file using xml in your theme/module

custom_module/view/frontend/layout/cms_index_index.xml or ( default.xml )

In head of your layout xml put relative path like below

        <css src="Custom_Module::css/hb_vertical_reviewrating.css"/>

Put your custom css files at this location

  • Nope, it's also not working Refused to apply style from 'site.com/pub/static/frontend/Sleepz/md/en_US/Magento_Theme/css/main.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled. – Oleg May 31 '18 at 7:32
  • please check .htaccess file in the pub/static – inrsaurabh May 31 '18 at 9:03
  • @Oleg Is your problem solved – inrsaurabh Jun 1 '18 at 14:15
  • sorry for the delay. Yes now it's solved. I just reinstalled Magento again and this time everything works like a charm. I have no clue what was wrong at first time – Oleg Jun 2 '18 at 19:54
  • Did you checked the . htaccess file ? – inrsaurabh Jun 3 '18 at 1:59

Add the your custom css in your theme folder


In default_head_blocks.xml file

    <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
      <!--  Add local resources -->

        <css src="css/main.css" />

    <!--  The following two ways to add local JavaScript files are equal     --> 
       <link src="js/bundle.js"/>

   <!-- Add external resources ->
   <css src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap-theme.min.css" src_type="url" />

  • well, will try in now. But does it really matter default_head_blocks.xml or default.xml? – Oleg May 30 '18 at 15:47
  • it didn't help, same issue – Oleg May 30 '18 at 15:50

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