Uncaught TypeError: $(...).datetimepicker is not a function

Can you show how you included the datetimepicker library in your composer.json file? I expect it is missing the following lines from composer.libraries.json:

        "extra": {
          "installer-name": "jquery-datetimepicker"
        },

I was getting similar issue. This fixed the issue for me.

    "extra": {
        "drupal-libraries-dependencies": true,
        "installer-name": "jquery-datetimepicker",
        "drupal-libraries": {
            "datetimepicker": "https://github.com/xdan/datetimepicker/archive/2.5.20.zip"
        },
}

I am having this issue too.

While I think that the best approach would be to work on the composer.json file, I am not really knowledgeable on that.
Also, I am not sure that the fix would be into place until a patch (to the composer.json file) makes into mainstream. I could be wrong on that (?).
In the meantime there is a patch that solves the issue in my environment.

By the way:
This modification was allready done in the last push before the release of 1.8.
It should just be cherry-picked to the 2.0 branch.
My 2 cents

I think you just need to fix the module description where it says how to add the library in the extra block, as shown below:

"drupal-libraries": {
  "jquery-datetimepicker": "https://github.com/xdan/datetimepicker/archive/2.5.20.zip"
},

In this case, the library will be downloaded to the correct directory.

Gautam_105@ → made their first commit to this issue’s fork.

@balbeeryadav,
i have try to reproduce this error but not getting any issue in console . if you have any other reproduce step then provide me . and see screenshot as well.

I think it makes use of the drupal-libraries-installer package as specified in the project page.

After adding:

 "extra": {
    "drupal-libraries": {
        "datetimepicker": "https://github.com/xdan/datetimepicker/archive/2.5.20.zip"
     },
}

in the project's main composer.json file (Not the module's json),
then do:
composer require zodiacmedia/drupal-libraries-installer (That will download the library) it will work. Reviewed and Thanks.

@Gautam_105@ please check whether you geting the calendar at the datetime field too.

Attaching ss

Thanks for the patience. The correct path has been correctly provided as "jquery-datetimepicker" in the module's README.md file.

However the homepage still used the old path (used in the 8.x-1.x branch). I've now fixed that.

@jcnventura you can consider granting credits to the people who have contributed :)

To be honest, this whole issue is just a mess. The only reason I saw it was because @EricVL mentioned it in 🐛 Library name issue (datetimepicker vs. jquery-datetimepicker) Fixed where I fixed the problem.

The only person in this issue that provided the correct answer to the problem was @k.prozorov in #7 and #8. I will give him credit for that.