Bootstrap 5 下拉菜单不适用于 angular 12 [英] Bootstrap 5 dropdown not working on angular 12

问题描述

我正在尝试在 Angular12 中添加 bootstrap5 下拉菜单，但它不起作用.
我已经安装了所有必需的包，并将它们添加到 angular.json 文件中.
从 bootstrap5 文档中复制了确切的示例仍然不起作用.

在 angular.json 中我给出了

样式":[node_modules/bootstrap/dist/css/bootstrap.min.css"],脚本":[node_modules/jquery/dist/jquery.min.js"，node_modules/popper.js/dist/umd/popper.min.js"，node_modules/bootstrap/dist/js/bootstrap.min.js"]

下面是我的 html 代码(与 bootstrap 5 文档中的相同)

<button class="btn btn-secondary dropdown-toggle";类型=按钮"id="dropdownMenuButton1";数据-bs-toggle =下拉"aria-expanded="false">下拉按钮<ul class="下拉菜单";aria-labelledby="dropdownMenuButton1"><li><a class="dropdown-item";href=#">动作</a></li><li><a class="dropdown-item";href=#">另一个动作</a></li><li><a class="dropdown-item";href=#">这里还有别的东西</a></li>

我使用命令 npm i 来安装软件包，但没有提及任何版本名称，所以我猜已经安装了最新版本.安装 jquery 作为最后的手段在某处读取引导程序 5 不需要 jquery.非常感谢任何帮助.

解决方案

根据 Bootstrap 5(单独部分)，Bootstrap 5 需要@popperjs/core 但不需要 popperjs.因此，您安装并导入了错误的库.

仅供参考，Bootstrap 5 移除了对 jQuery 的依赖.

---

方案一:安装@popperjs/core

1. 通过 npm 安装 @popperjs/core

npm install @popperjs/core

2. 将 @popperjs/core 导入 angular.json.Popper 必须首先出现(如果您使用的是工具提示或弹出框)，然后是我们的 JavaScript 插件.

<块引用>

angular.json

脚本":[./node_modules/@popperjs/core/dist/umd/popper.min.js"，./node_modules/bootstrap/dist/js/bootstrap.min.js"]

---

解决方案 2:将 Bootstrap 作为包导入

Bootstrap bundle 包括用于我们的工具提示和弹出框的 Popper.因此您无需单独安装 @popperjs/core.

<块引用>

angular.json

脚本":[./node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"]

---

解决方案 3:Angular Bootstrap

Angular Bootstrap Dropdown 是另一种使 Bootstrap 工作的选项Angular 应用.

1. 安装Angular Bootstrap (NG Bootstrap).立>

npm install @ng-bootstrap/ng-bootstrap

2. 将 NgbModule 添加到 app.module.ts 导入部分.

import { NgbModule } from '@ng-bootstrap/ng-bootstrap';@NgModule({进口:[.., NgbModule]})

3. 应用 Angular Bootstrap Dropdown 指令.

<button ngbDropdownToggle class="btn btn-secondary";类型=按钮"id="dropdownMenuButton1";aria-expanded="false">下拉按钮<ul ngbDropdownMenu aria-labelledby="dropdownMenuButton1"><li><a ngbDropdownItem href=#">动作</a></li><li><a ngbDropdownItem href=#">另一个动作</a></li><li><a ngbDropdownItem href=#">这里还有别的东西</a></li>

StackBlitz 上的示例解决方案 3

I'm trying to add bootstrap5 drop down in Angular12 it's not working.
I have installed all the necessary packages, added them in the angular.json file.
Copied the exact example from bootstrap5 docs still not working.

In angular.json i have given

 "styles": [
      "node_modules/bootstrap/dist/css/bootstrap.min.css"
    ],
 "scripts": [
      "node_modules/jquery/dist/jquery.min.js",
      "node_modules/popper.js/dist/umd/popper.min.js",
      "node_modules/bootstrap/dist/js/bootstrap.min.js"
   ]

Below is my html code (same as in bootstrap 5 docs)

<div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data- 
bs-toggle="dropdown" aria-expanded="false">
Dropdown button
  </button>
  <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
    <li><a class="dropdown-item" href="#">Action</a></li>
    <li><a class="dropdown-item" href="#">Another action</a></li>
    <li><a class="dropdown-item" href="#">Something else here</a></li>
  </ul>
</div>

I used the command npm i to install the packages without mentioning any version name so I guess the latest version was installed. Installed jquery as the last resort read somewhere bootstrap 5 don`t require jquery. Any help is greatly appreciated.

解决方案

According to Bootstrap 5 (Separate section), Bootstrap 5 requires @popperjs/core but not popperjs. Hence you were installing and importing wrong library.

FYI, Bootstrap 5 removed dependency on jQuery.

---

Solution 1: Install @popperjs/core

1. Install @popperjs/core via npm

npm install @popperjs/core

2. Import @popperjs/core into angular.json. Popper must come first (if you’re using tooltips or popovers), and then our JavaScript plugins.

angular.json

"scripts": [
  "./node_modules/@popperjs/core/dist/umd/popper.min.js",
  "./node_modules/bootstrap/dist/js/bootstrap.min.js"
]

---

Solution 2: Import Bootstrap as bundle

Bootstrap bundle include Popper for our tooltips and popovers. Hence you no need to install @popperjs/core separately.

angular.json

"scripts": [
  "./node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"
]

---

Solution 3: Angular Bootstrap

Angular Bootstrap Dropdown is another option which makes Bootstrap works in Angular App.

1. Install Angular Bootstrap (NG Bootstrap).

npm install @ng-bootstrap/ng-bootstrap

2. Add NgbModule into app.module.ts imports section.

import { NgbModule } from '@ng-bootstrap/ng-bootstrap';

@NgModule({
  imports: [.., NgbModule]
})

3. Apply Angular Bootstrap Dropdown directive.

<div ngbDropdown class="dropdown">
  <button ngbDropdownToggle class="btn btn-secondary" type="button" id="dropdownMenuButton1" aria-expanded="false">
Dropdown button
</button>
  <ul ngbDropdownMenu aria-labelledby="dropdownMenuButton1">
    <li><a ngbDropdownItem href="#">Action</a></li>
    <li><a ngbDropdownItem href="#">Another action</a></li>
    <li><a ngbDropdownItem href="#">Something else here</a></li>
  </ul>
</div>

Sample Solution 3 on StackBlitz

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