How To Concat Compiled Sass And Combined Css Using Laravel Mix?

In my Laravel project I use both SASS and CSS: SASS used for dependencies (fontawesome, Bootstrap) - via NPM and plain CSS across deep folder structure (BEM). I want to concatenate

Solution 1:

Here is an example:

mix.sass('resources/assets/sass/app.scss', 'public/css').styles([
    'node_modules/animate.css/animate.min.css',
    'public/css/app.css'
],'public/css/app.css');