Require support for AsyncContext

Author: Ms2ger

source

@@ -3055,6 +3055,15 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
 
     <p>User agents that support JavaScript must also implement the <cite>RegExp <code data-x="">v</code> flag</cite>
     proposal. <ref spec=JSREGEXPVFLAG></p>
+
+    <p>User agents that support JavaScript must also implement the <cite>AsyncContext</cite>
+    proposal. The following terms are defined there, and used in this specification: <ref
+    spec=JSASYNCCONTEXT></p>
+
+    <ul class="brief">
+     <li>The <dfn data-x="js-AsyncContextSnapshot" data-x-href="https://tc39.es/proposal-async-context/#sec-asynccontext-snapshot">AsyncContextSnapshot</dfn> abstract operation</li>
+     <li>The <dfn data-x="js-AsyncContextSwap" data-x-href="https://tc39.es/proposal-async-context/#sec-asynccontext-swap">AsyncContextSwap</dfn> abstract operation</li>
+    </ul>
    </dd>
 
    <dt>WebAssembly</dt>
@@ -100998,9 +101007,16 @@ dictionary <dfn dictionary>PromiseRejectionEventInit</dfn> : <span>EventInit</sp
     <p class="note">This affects the <span>active script</span> while the callback runs.</p>
    </li>
 
+   <li><p>Let <var>previousContextMapping</var> be <span
+   data-x="js-AsyncContextSwap">AsyncContextSwap</span>(<var
+   >callback</var>.[[AsyncContextSnapshot]]).</p></li>
+
    <li><p>Let <var>result</var> be <span>Call</span>(<var>callback</var>.[[Callback]], <var>V</var>,
    <var>argumentsList</var>).</p></li>
 
+   <li><p>Perform <span
+   data-x="js-AsyncContextSwap">AsyncContextSwap</span>(<var>previousContextMapping</var>).</p></li>
+
    <li><p>If <var>script execution context</var> is not null, then <span data-x="stack
    pop">pop</span> <var>script execution context</var> from the <span>JavaScript execution context
    stack</span>.</p></li>
@@ -101196,7 +101212,11 @@ dictionary <dfn dictionary>PromiseRejectionEventInit</dfn> : <span>EventInit</sp
     </div>
    </li>
 
+   <li><p>Let <var>snapshot</var> be <span
+   data-x="js-AsyncContextSnapshot">AsyncContextSnapshot</span>().</p></li>
+
    <li><p>Return the <span>JobCallback Record</span> { [[Callback]]: <var>callable</var>,
+   [[AsyncContextSnapshot]]: <var>snapshot</var>,
    [[HostDefined]]: { [[IncumbentSettings]]: <var>incumbent settings</var>, [[ActiveScriptContext]]:
    <var>script execution context</var> } }.</p></li>
   </ol>
@@ -133935,6 +133955,9 @@ INSERT INTERFACES HERE
    <dt id="refsJPEG">[JPEG]</dt>
    <dd><cite><a href="https://www.w3.org/Graphics/JPEG/jfif3.pdf">JPEG File Interchange Format</a></cite>, E. Hamilton.</dd>
 
+   <dt id="refsJSASYNCCONTEXT">[JSASYNCCONTEXT]</dt>
+   <dd><cite><a href="https://tc39.es/proposal-async-context/">AsyncContext</a></cite>. Ecma International.</dd>
+
    <dt id="refsJSERRORSTACKS">[JSERRORSTACKS]</dt>
    <dd>(Non-normative) <cite><a href="https://tc39.es/proposal-error-stacks/">Error Stacks</a></cite>. Ecma International.</dd>