Angular 4 Bootstrap Dropdown Require Popper Js

Are you looking to add a Bootstrap dropdown to your Angular 4 project but getting stuck with the 'Popper.js not found' error? Don't worry, we've got you covered! In this guide, we'll walk you through the steps to require Popper.js for your Angular 4 Bootstrap dropdown so you can enhance your user experience seamlessly.

**Step 1: Install Popper.js**

First things first, you need to install Popper.js in your Angular 4 project. Popper.js is a positioning engine that ensures your dropdowns, tooltips, and popovers are correctly positioned. You can install Popper.js using npm:

npm install @popperjs/core

This command will download and install Popper.js in your project, making it available for use.

**Step 2: Import Popper.js**

Next, you need to import Popper.js in your Angular component where you are using the Bootstrap dropdown. In your component file, add the following import statement:

import { createPopper } from '@popperjs/core';

By importing `createPopper` from `@popperjs/core`, you are making the Popper.js functionality available within your component.

**Step 3: Implement Popper.js with Bootstrap dropdown**

Now that you have Popper.js installed and imported, it's time to integrate it with your Bootstrap dropdown. To make the dropdown work seamlessly with Popper.js, you need to initialize a new Popper instance when the dropdown is interacted with. Here's an example of how you can achieve this:

import { createPopper } from '@popperjs/core';

export class YourComponent {
  private dropDown: any;
  private popper: any;

  ngAfterViewInit() {
    this.dropDown = document.getElementById('yourDropdown'); // Replace 'yourDropdown' with your dropdown ID
    this.popper = createPopper(this.dropDown, this.dropDown, {
      placement: 'bottom-start',
    });
  }
}

In this code snippet, we are initializing a new Popper instance in the `ngAfterViewInit` Angular lifecycle hook. Make sure to replace `'yourDropdown'` with the actual ID of your Bootstrap dropdown element.

**Step 4: Test and Customize**

Finally, test your Angular 4 Bootstrap dropdown with Popper.js integration. Open your project, interact with the dropdown, and observe how Popper.js helps position it correctly. You can also customize the placement, modifiers, and other options provided by Popper.js to tailor the dropdown behavior to your needs.

By following these steps, you can require Popper.js to enhance the functionality of your Angular 4 Bootstrap dropdown. Enjoy a smoother user experience with correctly positioned dropdowns thanks to Popper.js!