How to put form element (search bar) into the center of the navbar?

问题

<nav class="navbar navbar-light bg-light">
  <a class="navbar-brand" href="#">
    <img src="/docs/4.4/assets/brand/bootstrap-solid.svg" width="30" height="30" class="d-inline-block align-top" alt="">Bootstrap</a>
  <div class="d-flex justify-content-center">
    <form class="form-inline">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

I was trying to put element in the center of the Navbar. But isn't placing in the center of the Navbar it places at the end of the Navbar. So how can I place this search bar in the center of the Navbar?

回答1:

You should be able to review this website https://hackerthemes.com/bootstrap-cheatsheet/ and see the different types of navbar available, and understand the structure to move the search engine in the HTML.

回答2:

If you are trying to center all the elements in the navbar, you can do that by using the justify-content-center class in the nav

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" />

<nav class="navbar navbar-light bg-light justify-content-center">
  <a class="navbar-brand" href="#">
    <img src="/docs/4.4/assets/brand/bootstrap-solid.svg" width="30" height="30" class="d-inline-block align-top" alt="">Bootstrap</a>
  <div class="d-flex">
    <form class="form-inline">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

If you are trying to move the search block to the middle of the navbar, you could add an empty div to the end of the nav block, and add the justify-content-between class to the nav element.

Disclaimer: This is not a very clean solution

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" />

<nav class="navbar navbar-light bg-light justify-content-between">
  <a class="navbar-brand" href="#">
    <img src="/docs/4.4/assets/brand/bootstrap-solid.svg" width="30" height="30" class="d-inline-block align-top" alt="">Bootstrap</a>
  <div class="d-flex">
    <form class="form-inline">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
  <div></div>
</nav>

来源：https://stackoverflow.com/questions/59848572/how-to-put-form-element-search-bar-into-the-center-of-the-navbar