Topic: mdb.min.js:24 Uncaught TypeError: Cannot set property 'mdb' of undefined

Justin Hamilton free asked 3 years ago

*_Expected behavior_*I expect the page to load without error

*_Actual behavior_*I get this error on a fresh Rails 6 install with mdb 5 advanced added to the webpack and required in the application.js

Resources (screenshots, code snippets etc.)enter image description here

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On the image above I have tried both methods of importenter image description here

Additionally after all other methods failed I have tried providing the plugin but all methods have given the same resulting error

Below is my package.json

{ "name": "vagrant", "private": true, "dependencies": { "@rails/actioncable": "^6.0.0", "@rails/activestorage": "^6.0.0", "@rails/ujs": "^6.0.0", "@rails/webpacker": "4.3.0", "mdb-ui-kit": "git+", "turbolinks": "^5.2.0" }, "version": "0.1.0", "devDependencies": { "webpack-dev-server": "^3.11.0" } }

Additional scope debugenter image description here

Paused on caught exceptionenter image description here

2nd Pause on exceptionenter image description here

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final pause enter image description here

Justin Hamilton free answered 3 years ago

This is the secret sauce to get it to work in Rails enter image description here

vilage free answered 3 years ago

I found a fix:

Justin Hamilton free commented 3 years ago

Can you show what you did using the comments from the article?

vilage free answered 3 years ago

I'm having the exactly same issue on Pro version. When i install the free version, it works, so, i don't think it's our project configuration.

Can you, developer guys, help us?

Mikołaj Smoleński staff answered 3 years ago

In webpack applications mdb should be added as a global alias.

Here's the necessary config:

new Webpack.ProvidePlugin({
  'mdb': 'mdb',


  resolve: {
    alias: {
      '~': Path.resolve(__dirname, '../src'),
      'mdb': Path.join(__dirname, '../node_modules/mdb-ui-kit'),

I recommend to check our Webpack Starter.

Best regards

Justin Hamilton free commented 3 years ago

I've added everything but no matter what I get Module not found: Error: Can't resolve 'mdb' in '/vagrant/node_modules/mdb-ui-kit/js' that path is correct to the js folder

Mikołaj Smoleński staff commented 3 years ago

It seems there is a problem with your project's configuration and we can't help with it since we don't guarantee Rails integration. Still, I suggest to compare your configuration with our Webpack starter config. Best regards

Sense4 priority commented 1 year ago

And where should I enter this configuration - in what file?

Please insert min. 20 characters.


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Specification of the issue

  • ForumUser: Free
  • Premium support: No
  • Technology: MDB Standard
  • MDB Version: 2.0.0
  • Device: PC
  • Browser: Chrome
  • OS: Windows
  • Provided sample code: No
  • Provided link: Yes