Mime-type warning in Firefox

[jnaklaas]

I use the v3 plugin with webpack. The Firefox browser console throws a warning stating my js is loaded, but has a wrong mime-type: Het script van ‘http://localhost:3000/’ is geladen, hoewel het MIME-type ervan (‘text/html’) geen geldig JavaScript-MIME-type is.

The warning translates to The script is loaded, although its MIME-type (‘text/html’) is not a valid JavaScript-MIME-type.

The .babelrc:

{
  "presets": [ "@babel/preset-env"],
  "plugins": [
    ["babel-plugin-inline-import", {"extensions": [".html"]}]
  ]
}

The javascript:

import html from './template.html';
console.log(html);

My code works. Webkit browsers don't show this warning, Firefox does though.