[wp-trac] [WordPress Trac] #31909: wp_dropdown_categories() select field cannot accept HTML 'required'

[WordPress Trac]

#31909: wp_dropdown_categories() select field cannot accept HTML 'required'
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 Reporter:  wzislam       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.1.1
 Severity:  normal        |   Keywords:
  Focuses:  template      |
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 === Steps to Reproduce ===

 * Add a `<form>` somewhere in your theme/plugin
 * Call `<?php wp_dropdown_categories(); ?>`
 * Add a `<button>Submit</submit>` button
 * Close the `</form>`
 * Submit the form

 There are no supporting argument that can pass a required option to the
 select field.

 You can't make the select field mandatory without JavaScripts. But HTML5
 has a nice required attribute that supports most of the modern browsers.

 We solved the issue in this WPSE thread:
 http://wordpress.stackexchange.com/q/183292/22728

 But IMHO it's time to have core patch.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31909>
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