Expected behavior: Wave effect on button click

Actual behavior: Styles applied correctly, but no wave effect on click

Resources (screenshots, code snippets etc.):

in my app.js

require('./bootstrap');
import 'bootstrap-css-only/css/bootstrap.min.css';
import 'mdbvue/lib/css/mdb.min.css';
window.Vue = require('vue');

in my bootstrap.js

try {
    window.Popper = require('popper.js').default;
    window.$ = window.jQuery = require('jquery');

    require('bootstrap');
    require('mdbvue');
} catch (e) {}

Please, note: I have no jQuery running. My app has only VueJS.