CODEWITHSUNDEEP
javascripttwitter-bootstrapwebpackaureliabootstrap-4
ghiscoding
ghiscoding

Reputation: 13214

Bootstrap 4 Beta importing Popper.js with Webpack 3.x throws Popper is not a constructor

So Bootstrap 4 Beta is out... yay! However Tether was replaced with Popper.js for tooltip (and other features), but with that I see a new error thrown in the console to advise me of the change to Popper.js:

Bootstrap dropdown require Popper.js

Seems easy enough, I went and updated my webpack.config.js (the entire config can be seen here) and Bootstrap then started working (the only change I did was to replace Tether with Popper):

plugins: [
new ProvidePlugin({
  'Promise': 'bluebird',
  '$': 'jquery',
  'jQuery': 'jquery',
  'window.jQuery': 'jquery',
  'window.$': 'jquery',
  Popper: 'popper.js' 
}),

I also did the import 'bootstrap' in my main.ts file.

However I now have another problem (which I did not have with Tether), a new error is thrown in the console:

Uncaught TypeError: Popper is not a constructor

If I try to debug in Chrome, I do have Popper loaded as an Object (which is why Bootstrap stopped complaining) as you can see in the print screen below. enter image description here

Finally to include all my code. I use Bootstrap tooltip with a simple custom element built with Aurelia and TypeScript (which used to work with previous Bootstrap alpha 6 and Tether)

import {inject, customAttribute} from 'aurelia-framework';
import * as $ from 'jquery';

@customAttribute('bootstrap-tooltip')
@inject(Element)
export class BootstrapTooltip {
  element: HTMLElement;

  constructor(element: HTMLElement) {
    this.element = element;
  }

  bind() {
    $(this.element).tooltip();
  }

  unbind() {
    $(this.element).tooltip('dispose');
  }
}

Looks like I did not import Popper correctly, if so then what is the best way to achieve that with Webpack 3.x?

Upvotes: 18

Views: 23702

Answers (5)

Syed
Syed

Reputation: 16523

In bootstrap": "^4.1.1" no need to import jquery and popper.js because those plugins will be already included when 'bootstrap' or bootstrap's plugins imported individually.

Notice that if you chose to import plugins individually, you must also install exports-loader

No need to require files require('exports-loader?file ... '); as mentioned here because this will be taken care automatically by just installing $ npm install exports-loader --save-dev

import 'bootstrap'; // Import all plugins at once

//
// Or, import plugins individually
//
// import 'bootstrap/js/src/alert';
// import 'bootstrap/js/src/button';
// import 'bootstrap/js/src/carousel';
// import 'bootstrap/js/src/collapse';
// import 'bootstrap/js/src/dropdown';
// import 'bootstrap/js/src/modal';
// import 'bootstrap/js/src/popover';
// import 'bootstrap/js/src/scrollspy';
// import 'bootstrap/js/src/tab';
// import 'bootstrap/js/src/tooltip';
// import 'bootstrap/js/src/util';

There is no need to do anything like below:

const webpack = require('webpack');

module.exports = {
  configureWebpack: {
    plugins: [
      new webpack.ProvidePlugin({
        $: 'jquery',
        jQuery: 'jquery',
        'window.jQuery': 'jquery',
        Popper: ['popper.js', 'default']
      })
    ]
  }
}

I am a vue.js developer and in new vue-cli-3, we create vue.config.js in root and place code like above to register new plugin, but as said there is no need to do all this in bootstrap": "^4.1.1".

Bootstrap's tooltip plugin is depend on popper.js and need to be enabled manually, so you can do like below in the component where you use tooltip element:

<script>
  import $ from 'jquery';

  export default {
    mounted() {
      $('[data-toggle="tooltip"]').tooltip();
    },
  };
</script>

Upvotes: 6

HolyM
HolyM

Reputation: 312

In ASP.net Core 2 project add the following scripts to of main HTML file ("_Layout.cshtml" file)

<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/js/popper.js"></script>
<script src="~/lib/bootstrap/dist/js/bootstrap.min.js"></script>

For me it's working.

Upvotes: 0

Azimi
Azimi

Reputation: 9657

If you are using Webpack Do this:

window.$ = window.jQuery = require('jquery');
window.Popper = require('popper.js').default; // pay attention to "default"
require('bootstrap/dist/js/bootstrap');

Upvotes: 7

Phil Cox
Phil Cox

Reputation: 103

I just ran into the same issue, and the solution is described here: https://github.com/FezVrasta/popper.js/issues/287

My main.ts now looks like something like the following:

import "jquery";
import Popper from "popper.js";

(<any>window).Popper = Popper;

require("bootstrap");

And I had to run npm install @types/requirejs --save to get the call to require working.

EDIT: I totally missed this the first time around, but the documention actually has a better way to solve this https://getbootstrap.com/docs/4.0/getting-started/webpack/

plugins: [
  ...
  new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    'window.jQuery': 'jquery',
    Popper: ['popper.js', 'default'],
    // In case you imported plugins individually, you must also require them here:
    Util: "exports-loader?Util!bootstrap/js/dist/util",
    Dropdown: "exports-loader?Dropdown!bootstrap/js/dist/dropdown",
    ...
  })
  ...
]

Upvotes: 3

ghiscoding
ghiscoding

Reputation: 13214

While browsing Bootstrap 4 documentation. I actually found a section about Webpack which explains how to install it correctly. Following the Bootstrap - installing with Webpack documentation, the answer is to simply modify the webpack.config.js with the following:

plugins: [
  // ...
  new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    'window.jQuery': 'jquery',
    Popper: ['popper.js', 'default']
  })
  // ...
]

and let's not forget to import it in the main.ts

import 'bootstrap';

and voilà! We are back in business :)

Upvotes: 35

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