customDateFormat shows 'undefined' when you manually erase the date

[Frenzie]

Prerequisites

• I have searched for duplicate or closed issues.
• I have validated my setup against the latest version on StackBlitz.
• I have read the contributing guidelines.

Describe the issue

See the sample on https://getdatepicker.com/6/plugins/customDateFormat.html

Steps to reproduce

1. Set a date
2. Empty the input
3. The input now shows 'undefined'
   

Expected

It's just empty.

StackBlitz fork

https://getdatepicker.com/6/plugins/customDateFormat.html

What operating system(s) are you seeing the problem on?

Windows, macOS, Android, iOS, Linux

What browser(s) are you seeing the problem on?

Chrome, Safari, Firefox, Microsoft Edge, Opera

What version of are you using? You can find this information from the sample StackBlitz.

v6.2.4

What your browser's locale? You can find this information from the sample StackBlitz.

en-US

[JerryBels]

Came here to report exactly that... +1

[dcopadosalmeron]

By default, the "defaultDate" option is equal to undefined. Just set this option to double quotes: defaultDate: ""
doc

[Frenzie]

An empty or random string doesn't seem to be accepted. At a glance only an ISO string or a Date object are accepted.

But luckily defaultDate doesn't affect the steps described regardless. If it did you could just replace undefined in my OP with defaultDate. ;-)

The correct behavior is observed when you click the trashcan from adding clear: true and when customDateFormat isn't enabled:

    buttons:{
      clear: true
    },

[JerryBels]

Yes I can confirm defaultDate doesn't have anything to do with the matter.

[Eonasdan]

hi. I believe this is resolved in the related branch. Please check this stackblitz

[Frenzie]

I don't think I understand the other changes but the if (!date) return '' part seems to have the intended effect. 👍

[Eonasdan]

Yeah I'm still trying to get the plugin to behave with time zone bits and thought I could squeeze it in. Glad it's working, I'll get it pub'd soon.

[Eonasdan]

Hello. This should be fixed in 6.2.7