将（例如）Ymd 字符串从 PHP 转换为 JS 中的等效日期格式

Question

I have a PHP variable which is a date format string, it is "Ymd" but could be other date format strings, I'd like to pass this to a script which requires a JS date format string.

Therefore my Ymd from PHP is the equivalent of YYYY-MM-DD in JS.

What can I do on either the PHP or JS side to convert the PHP based date format string of Ymd to the JS equivalent?

I am looking to convert the date format string itself, not the actual date.

Answer 1

I'm really not sure on what your issue is. But I've spun up a local version of what you're using and I've created the following code:

  <input value="<?php echo date('Y-m-d'); ?>" id="litepicker">
  <script src="https://cdn.jsdelivr.net/npm/litepicker/dist/js/main.js"></script>
  <script>
    var picker = new Litepicker({ 
      element: document.getElementById('litepicker'),
      format: 'D MMM, YYYY',
    });
  </script>

As you can see, its a new Litepicker instance, formatted to look nicely, but the input element has the value set to what you'd get back from the database, and it looks like this on screen:

If I'm misunderstanding you, please let me know. But I cannot see the issue.