How can I creat custom menu with bootstrap

Question

I'm trying to create bootstrap collapsing navbar for WordPress template. I have to add some HTML properties such as data-toggle. After researching, I found that must customize the Walker class but start_lvl and start_el just effecting on sub menu.

Generally, how can I create bootstrap collapsing navbar like w3schools and the sublist displayed like here (drop-down menu in collapsing navbar)?

Thanks

Answer 1

I think you can use this simple class:

• https://github.com/wp-bootstrap/wp-bootstrap-navwalker