Meteor JS failed to load the CSS file due to an unsupported MIME type

Currently, I am working on a meteor js 1.8 app. I have created a layout and now I want to add CSS to it. Here is the structure I am following:

imports


-ui
--stylesheets
--bootstrap.min.css
--font-awesome.min.css
--skins.css
--forms.css

All my CSS files are placed in the 'stylesheets' folder under imports. I have a layout named 'main_layout.html', along with 'main_layout.js' and 'main_layout.css' files which I have organized as:


-ui
--layouts
---dashboard
---main_layout.html
---main_layout.js
---main_layout.css

In the 'main_layout.css' file, I have imported all the styles like this:


@import '{}/imports/ui/stylesheets/bootstrap.min.css';
@import '{}/imports/ui/stylesheets/font-awesome.min.css';
@import '{}/imports/ui/stylesheets/skins.css';
@import '{}/imports/ui/stylesheets/forms.css';

Furthermore, I have imported 'main_layout.css' in 'main_layout.js' :


import './main_layout.html'
import './main_layout.css'

I am using a rule for flow-router to render this layout:


import '../../ui/layouts/dashboard/main_layout'

FlowRouter.route('/', {
    name: 'App.home',
    action() {
    BlazeLayout.render('mainLayout', {main: ''});
    },
});

However, when I visit localhost:3000/, I encounter an error in the browser console:

The stylesheet http://localhost:3000/%7B%7D/imports/ui/stylesheets/bootstrap.min.css was not loaded because its MIME type, “text/html”, is not “text/css”.

Similar issues occur for the rest of the CSS files. How can I resolve this problem and load CSS using imports correctly?

Answer №1

Welcome to the world of Stack Overflow!

If you're seeing a MIME type error message, it's likely because your browser is trying to fetch a CSS file that your server can't locate, resulting in an HTML page being returned instead. This is common in Meteor apps, where a missing file is often substituted with your main page.

For more information, check out this Refused to apply style from '' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled

In your case, keep in mind that the @import in your CSS isn't processed by your Meteor CSS package—it's simply copied as-is into your CSS rules. To work around this, you can place your vendor CSS in the public folder of your project as a static asset, and adjust the import path like this:

@import '/stylesheets/bootstrap.min.css';

(Assuming you've placed the vendor file in

public/stylesheets/bootstrap.min.css
)

Alternatively, you can import each CSS file by referencing them in your JS file, similar to how you imported your entry CSS file, or consider using a different style compiling package like meteor sass that can handle the imports more effectively.

Answer №2

replace @ with . to access public files, as shown in the example below:

import './stylesheets/bootstrap.min.css';

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