Apply RFC 8264 enforcement only to non-empty strings (#2073)

SHA: 49325c8
Reason: push, by akshayku

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

index.html

@@ -4,9 +4,9 @@
  <meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
  <title>Web Authentication: An API for accessing Public Key Credentials - Level 3</title>
  <meta content="ED" name="w3c-status">
- <meta content="Bikeshed version a1dabb26c, updated Mon Jun 17 15:00:44 2024 -0700" name="generator">
+ <meta content="Bikeshed version c3a8ac783, updated Wed Jul 24 12:20:06 2024 -0700" name="generator">
  <link href="https://www.w3.org/TR/webauthn-3/" rel="canonical">
- <meta content="2b8e3688f0adec29b6f845c10f4e19402e6ea66a" name="revision">
+ <meta content="49325c8983c688c4526815ee008289aa9f276b1f" name="revision">
  <meta content="dark light" name="color-scheme">
 <style type="text/css">
 body {
@@ -965,7 +965,7 @@
  <div class="head">
  <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
  <h1>Web Authentication:<br>An API for accessing Public Key Credentials<br>Level 3</h1>
- <p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">Editor’s Draft</a>, <time class="dt-updated" datetime="2024-07-17">17 July 2024</time></p>
+ <p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">Editor’s Draft</a>, <time class="dt-updated" datetime="2024-07-31">31 July 2024</time></p>
  <details open>
  <summary>More details about this document</summary>
  <div data-fill-with="spec-metadata">
@@ -4004,13 +4004,14 @@ <h4 class="heading settled" data-level="5.4.3" id="dictionary-user-credential-pa
  <ul>
  <li data-md>
  <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④③">Relying Parties</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
-when setting <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑥">displayName</a></code>'s value, or displaying the value to the user.</p>
+when setting <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑥">displayName</a></code>'s value to a non-empty string,
+or displaying a non-empty value to the user.</p>
  <li data-md>
  <p>This string MAY contain language and direction metadata. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④④">Relying Parties</a> SHOULD consider providing this information. See <a href="#sctn-strings-langdir">§ 6.4.2 Language and Direction Encoding</a> about how this metadata is encoded.</p>
  <li data-md>
  <p><a data-link-type="dfn" href="#client" id="ref-for-client④⑦">Clients</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
-on <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑦">displayName</a></code>'s value prior to displaying the value to the user or
-including the value as a parameter of the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential⑨">authenticatorMakeCredential</a> operation.</p>
+on <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑦">displayName</a></code>'s value prior to displaying a non-empty value to the user or
+including a non-empty value as a parameter of the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential⑨">authenticatorMakeCredential</a> operation.</p>
  </ul>
  <p>When <a data-link-type="dfn" href="#client" id="ref-for-client④⑧">clients</a>, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③④">client platforms</a>, or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⓪⑦">authenticators</a> display a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑧">displayName</a></code>'s value, they should always use UI elements to provide a clear boundary around the displayed value, and not allow overflow into other elements <a data-link-type="biblio" href="#biblio-css-overflow-3" title="CSS Overflow Module Level 3">[css-overflow-3]</a>.</p>
  <p>When storing a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑨">displayName</a></code> member’s value,