i have problem inserting plugins manually from admin LTE template to laravel SPA vue.

already imported but module error, like below

app.js

require('../assets/plugins/datatables-bs4/js/dataTables.bootstrap4');

webpack.mix.js

mix.js('resources/js/app.js', 'public/js')
    .vue()
    .sass('resources/sass/app.scss', 'public/css')
    .js('node_modules/popper.js/dist/popper.js', 'public/js').sourceMaps();

and get error ERROR in ./resources/assets/plugins/datatables-bs4/js/dataTables.bootstrap4.js Module not found: Error: Can't resolve 'datatables.net' in 'C:\xampp\htdocs\stopper-dev\resources\assets\plugins\datatables-bs4\js'