No icons on last version (6.4.1)

[ppazos]

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

I setup a picker and the calendar appears without any icons (time, chevrons, etc)

Checked this page where it says which icons should be mapped to each area: https://getdatepicker.com/6/plugins/fa5.html

In my HTML found the generated HTML didn't have the 'fas' class for the icons, as that page shows, so it's currently only 'fa-clock' instead of 'fas fa-clock'.

Without the 'fas' class, the icons don't work. Tested adding that class via the browser's console and it worked. So on my min.css file I added 'fas' to all icon classes like below and it works:

display:{icons:{type:"icons",time:"fas fa-solid fa-clock",date:"fas fa-solid fa-calendar",up:"fas fa-solid fa-arrow-up",down:"fas fa-solid fa-arrow-down",previous:"fas fa-solid fa-chevron-left",next:"fas fa-solid fa-chevron-right",today:"fas fa-solid fa-calendar-check",clear:"fas fa-solid fa-trash",close:"fas fa-solid fa-xmark"}

Though I would prefer not to touch the code to avoid maintenance issues.

Any idea why 'fas' is not added?

Also found https://getdatepicker.com/6/options/ where the 'fas' class is also missing:

  display: {
    icons: {
      type: 'icons',
      time: 'fa-solid fa-clock',
      date: 'fa-solid fa-calendar',
      up: 'fa-solid fa-arrow-up',
      down: 'fa-solid fa-arrow-down',
      previous: 'fa-solid fa-chevron-left',
      next: 'fa-solid fa-chevron-right',
      today: 'fa-solid fa-calendar-check',
      clear: 'fa-solid fa-trash',
      close: 'fa-solid fa-xmark'
    },

Note I'm using fontawesome 5.x with the fa5 plugin enabled, and doesn't seem to work.
tempusDominus.extend(window.tempusDominus.plugins.fa_five.load);

StackBlitz fork

https://tempus-dominus-v6-simple-setup-vwfarg.stackblitz.io

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

Linux

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

Firefox

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

6.2.10

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

en-US

[Eonasdan]

FA6 uses fa-solid and fas interchangeably, but their docs default to fa-solid and I assume that is what they will use going forward.

You need to load the plugin first if you want it to affect all the pickers. You also need to change the icon in the html.

[ppazos]

Thanks @Eonasdan i have followed this guide, where the fa5 plugin is loaded right after the picker is created

https://getdatepicker.com/6/plugins/fa5.html

So my code is basically line 1 and 5 which is what I used in stackblitz https://stackblitz.com/edit/tempus-dominus-v6-simple-setup-vwfarg?file=index.html,index.js (not sure why the link in the original message is not loading, try this one)

[Eonasdan]

Please review this fork and note the changes