html - 我的 Bootstrap 模式仅适用于 index.html 页面

Question

它不会在我的其他 2 个页面上切换和打开。

<nav class="navbar navbar-toggleable-sm navbar-light bg-faded navbar-custom">
        <div class="container">
            <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
            <a class="navbar-brand" href="http://www.nick.com/spongebob-squarepants/"><span class="copyright-text">Sponge Bob Square-Pants</span></a>
            <div class="collapse navbar-collapse" id="navbarNav">
                <ul class="navbar-nav">
                    <li class="nav-item active">
                        <a class="nav-link" href="index.html">About <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="portfolio.html">Portfolio</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="contact.html">Contact</a>
                    </li>
                </ul>
            </div>
        </div>
    </nav>

https://lonniewhite.github.io/SpongeBobSquarePants-JobPortfolio/

Answer 1

1) 您必须在希望它出现的每个页面中包含导航栏
2) 你必须在包含导航栏的每个页面中包含 bootstrap 和 jquery。在 head 标签中，确保你写了这个:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>

编辑:另外，请确保“portfolio.html”和“contact.html”编写正确并且与 index.php 位于同一文件夹中