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javascript - 使用 json 的 Bootstrap 4 导航栏

问题描述

我想使用 bootstrap 4 导航栏创建导航栏，并且我想使用 json 在其中添加项目。

我尝试了一些想法，并在谷歌上搜索了一些想法，但没有很多人尝试过，所以我想也许这里有人可以帮助我。

HTML

    <nav class="navbar navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" 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>
        <div class="collapse navbar-collapse" id="navbarNav results_buttons">
            <ul class="navbar-nav">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Features</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Pricing</a>
                </li>
            </ul>
        </div>
    </nav>

JS

        $(document).ready(function () {
            $.getJSON('events.json', function (data) {
                var results_buttons = '';
                $.each(data, function (key, value) {
                    results_buttons += '<ul>';
                    results_buttons += '<li">' + value.name + '</li>';
                    results_buttons += '</ul>';
                });
                $('#results_buttons').append(results_buttons);
            });
        });

JSON

[
        {
            "id" : "1", 
            "name" : "100m"
        },

        {
            "id" : "2", 
            "name" : "Long Jump"
        },

        {
            "id" : "3", 
            "name" : "Shot Put"
        },

        {
            "id" : "4", 
            "name" : "High Jump"
        }
]

理想的结果应该看起来像正常的 bootstrap 4 菜单，但从 json 获取信息。

标签： javascriptjqueryjsonbootstrap-4

解决方案

您的导航栏无效id。不应该有空格：

<div class="collapse navbar-collapse" id="navbarNav results_buttons">

所以假设正确的id是navbarNav，这里有一个工作演示：

// Make sure to point to the proper JSON file. Here I used CodePen for demo purposes.
$.getJSON( 'https://codepen.io/anon/pen/QPvNQg.html', function( data ){
  var $menu = $( '#navbarNav ul.navbar-nav' );
  $.each( data, function(){
    var url = this.url || '#';
    $menu.append(
      '<li class="nav-item">' +
        '<a class="nav-link" href="' + url + '">' + ( this.name || this.id ) + '</a>' +
      '</li>'
    );
  });
});
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" 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>
  <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
    </ul>
  </div>
</nav>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>

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