How to remove Bootstrap 3 and install Bootstrap 4 in the yii2 basic template?
This tutorial explains how to remove bootstrap3 from the yii2 application and install bootstrap4.
External Libraries
Implement jQuery Sortable in Yii2
Implement drag and drop reordering of the table rows using jQuery UI sortable and save their updated positions to the database using AJAX.
Add an external JavaScript library to a view in Yii2 that depends on jQuery Asset
Yii2 provides registerJsFile() function to add an external JavaScript file directly to the view.