Answers for "menu toggle button bootstrap"

bootstrap navbar fixed top

<section id="headnev" class="navbar navbar-fixed-top">

bootstrap button menu

<div class="btn-group" role="group" aria-label="Basic example">
  <button type="button" class="btn btn-secondary">Left</button>
  <button type="button" class="btn btn-secondary">Middle</button>
  <button type="button" class="btn btn-secondary">Right</button>
</div>