javascript - vue-bootstrap shows components content badly when page loads

Question

I use vue bootstrap framework in my project. When page loading the components content show up on page for 1 seconds then page loading finishes everything seem normal for example modal window or dropdown. You can view from picture what I want to mean. So I don't know why this happens. And I use webpack to compile scss and js and inside head section I call these css and js files.

标签： javascriptvue.jswebpackbootstrap-vue