CSS file blocked: MIME type mismatch (X-Content-Type-Options: nosniff)

Question

I am developing an Angular 4 app and I want to apply some global styles. Following the tutorial at the angular site, I\'ve created a \"styles.css\" file in the root directo

Answer 1

What seemed to work for me was changing

<script type="text/javascript" src="/lib/matrix.js"></script>

to

<script type="text/javascript" src="./lib/matrix.js"></script>

Answer 2

In my case I had jumbled up the code blocks below in reverse order so I was getting this error. If you have this issue, follow the below order and it might help

1.

 app.use(express.static(path.join(__dirname, 'public')));

2.

app.get('*', (req, res) => {
   res.sendFile(path.join(__dirname, 'public/index.html'));
});

3.

app.use('/api', cors(corsOptions), indexRouter);

Answer 3

I just ran into the same issue. It appears to be a quirk of Express that can manifest itself for a few different reasons, judging by the number of hits from searching the web for "nodejs express css mime type".

Despite the type="text/css" attribute we put in our <link elements, Express is returning the CSS file as

Content-Type: "text/html; charset=utf-8"

whereas it really should be returning it as

Content-Type: "text/css"

For me, the quick and dirty workaround was to simply remove the rel= attribute, i.e., change

<link rel="stylesheet" type="text/css" href="styles.css">

to

<link type="text/css" href="styles.css">

Testing confirmed that the CSS file was downloaded and the styles did actually work, and that was good enough for my purposes.