Add text imports

Adds support for the `{ type: 'text' }` import attribute,
which enables importing text content as a JavaScript string.

Part of #9444

Author: eemeli

source

@@ -3194,6 +3194,13 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li>The <dfn data-x="js-HostGetCodeForEval" data-x-href="https://tc39.es/proposal-dynamic-code-brand-checks/#sec-hostgetcodeforeval">HostGetCodeForEval</dfn> abstract operation</li>
     </ul>
 
+    <p>User agents that support JavaScript must also implement the <cite>Import Text</cite> proposal.
+    The following term is defined there, and used in this specification: <ref>JSIMPORTTEXT</ref></p>
+
+    <ul class="brief">
+     <li>The <dfn data-x-href="https://tc39.es/proposal-import-text/#sec-create-text-module">CreateTextModule</dfn> abstract operation</li>
+    </ul>
+
     <p>User agents that support JavaScript must also implement <cite>ECMAScript
     Internationalization API</cite>. <ref>JSINTL</ref></p>
 
@@ -28631,7 +28638,7 @@ document.body.appendChild(wbr);</code></pre>
   <p>A user agent must not <span>delay the load event</span> for this link type.</p>
 
   <p>A <dfn>module preload destination</dfn> is "<code data-x="">json</code>", "<code
-  data-x="">style</code>", or a <span
+  data-x="">style</code>", "<code data-x="">text</code>", or a <span
   data-x="concept-script-like-destination">script-like destination</span>.</p>
 
   <div algorithm>
@@ -117042,7 +117049,8 @@ document.querySelector("button").addEventListener("click", bound);
      script">JavaScript module scripts</span>;</p></li>
 
      <li><p>a <span>Synthetic Module Record</span>, for <span data-x="CSS module script">CSS module
-     scripts</span> and <span data-x="JSON module script">JSON module scripts</span>;</p></li>
+     scripts</span>, <span data-x="JSON module script">JSON module scripts</span>, and
+     <span data-x="text module script">text module scripts</span>;</p></li>
 
      <li><p>a <span>WebAssembly Module Record</span>, for <span data-x="WebAssembly module
      script">WebAssembly module scripts</span>; or</p></li>
@@ -117152,6 +117160,15 @@ document.querySelector("button").addEventListener("click", bound);
     -->
    </li>
 
+   <li>
+    <div algorithm>
+    <p>A <span>module script</span> is a <dfn export>text module script</dfn> if its <span
+    data-x="concept-script-record">record</span> is a <span>Synthetic Module Record</span>, and it
+    was created via the <span data-x="creating a text module script">create a text module
+    script</span> algorithm. Text module scripts represent textual data encoded as UTF-8.</p>
+    </div>
+   </li>
+
    <li>
     <div algorithm>
     <p>A <span>module script</span> is a <dfn export>WebAssembly module script</dfn> if
@@ -117161,11 +117178,11 @@ document.querySelector("button").addEventListener("click", bound);
    </li>
   </ul>
 
-  <p class="note">As CSS style sheets and JSON documents do not import dependent modules, and do not
+  <p class="note">As CSS style sheets, JSON documents, and text do not import dependent modules, and do not
   throw exceptions on evaluation, the <span data-x="concept-script-script-fetch-options">fetch
   options</span> and <span data-x="concept-script-base-url">base URL</span> of <span data-x="CSS
-  module script">CSS module scripts</span> and <span data-x="JSON module script">JSON module
-  scripts</span> and are always null.</p>
+  module script">CSS module scripts</span>, <span data-x="JSON module script">JSON module
+  scripts</span>, and <span data-x="text module script">text module scripts</span> are always null.</p>
 
   <div algorithm>
   <p>The <dfn>active script</dfn> is determined by the following algorithm:</p>
@@ -118101,6 +118118,10 @@ document.querySelector("button").addEventListener("click", bound);
        <li><p>Let <var>sourceText</var> be the result of <span data-x="UTF-8 decode">UTF-8
        decoding</span> <var>bodyBytes</var>.</p></li>
 
+       <li><p>If <var>moduleType</var> is "<code data-x="">text</code>", then set
+       <var>moduleScript</var> to the result of <span>creating a text module script</span> given
+       <var>sourceText</var> and <var>settingsObject</var>.</p></li>
+
        <li><p>If <var>mimeType</var> is a <span>JavaScript MIME type</span> and <var>moduleType</var>
        is "<code data-x="">javascript-or-wasm</code>", then set <var>moduleScript</var> to the result of
        <span>creating a JavaScript module script</span> given <var>sourceText</var>,
@@ -118453,6 +118474,32 @@ document.querySelector("button").addEventListener("click", bound);
   </ol>
   </div>
 
+  <div algorithm>
+  <p>To <dfn data-x="creating a text module script">create a text module script</dfn>, given a
+  string <var>text</var> and an <span>environment settings object</span> <var>settings</var>:</p>
+
+  <ol>
+   <li><p>Let <var>script</var> be a new <span>module script</span> that this algorithm will
+   subsequently initialize.</p></li>
+
+   <li><p>Set <var>script</var>'s <span data-x="concept-script-settings-object">settings
+   object</span> to <var>settings</var>.</p></li>
+
+   <li><p>Set <var>script</var>'s <span data-x="concept-script-base-url">base URL</span> and
+   <span data-x="concept-script-script-fetch-options">fetch options</span> to null.</p></li>
+
+   <li><p>Set <var>script</var>'s <span data-x="concept-script-parse-error">parse error</span> and
+   <span data-x="concept-script-error-to-rethrow">error to rethrow</span> to null.</p></li>
+
+   <li><p>Let <var>result</var> be <span>CreateTextModule</span>(<var>text</var>).</p></li>
+
+   <li><p>Set <var>script</var>'s <span data-x="concept-script-record">record</span> to
+   <var>result</var>.</p></li>
+
+   <li><p>Return <var>script</var>.</p></li>
+  </ol>
+  </div>
+
   <div algorithm>
   <p>The <dfn>module type from module request</dfn> steps, given a <span>ModuleRequest
   Record</span> <var>moduleRequest</var>, are as follows:</p>
@@ -118491,7 +118538,8 @@ document.querySelector("button").addEventListener("click", bound);
 
   <ol>
    <li><p>If <var>moduleType</var> is not "<code data-x="">javascript-or-wasm</code>", "<code
-   data-x="">css</code>", or "<code data-x="">json</code>", then return false.</p></li>
+   data-x="">css</code>", "<code data-x="">json</code>", or "<code data-x="">text</code>", then
+   return false.</p></li>
 
    <li><p>If <var>moduleType</var> is "<code data-x="">css</code>" and the
    <code>CSSStyleSheet</code> interface is not <span data-x="idl-exposed">exposed</span> in
@@ -118514,6 +118562,9 @@ document.querySelector("button").addEventListener("click", bound);
    <li>If <var>moduleType</var> is "<code data-x="">css</code>", then return "<code
    data-x="">style</code>".</li>
 
+   <li>If <var>moduleType</var> is "<code data-x="">text</code>", then return "<code
+   data-x="">text</code>".</li>
+
    <li>Return <var>defaultDestination</var>.</li>
   </ol>
   </div>
@@ -156790,6 +156841,9 @@ INSERT INTERFACES HERE
    <dt id="refsJSDYNAMICCODEBRANDCHECKS">[JSDYNAMICCODEBRANDCHECKS]</dt>
    <dd><cite><a href="https://tc39.es/proposal-dynamic-code-brand-checks/">Dynamic code brand checks</a></cite>. Ecma International.</dd>
 
+   <dt id="refsJSIMPORTTEXT">[JSIMPORTTEXT]</dt>
+   <dd><cite><a href="https://tc39.es/proposal-import-text/">Import Text</a></cite>. Ecma International.</dd>
+
    <dt id="refsJSINTL">[JSINTL]</dt>
    <dd><cite><a href="https://tc39.es/ecma402/">ECMAScript Internationalization API Specification</a></cite>. Ecma International.</dd>
 
@@ -157505,6 +157559,7 @@ INSERT INTERFACES HERE
   Eduardo Vela,
   Edward Welbourne,
   Edward Z. Yang,
+  Eemeli Aro, <!-- eemeli on GitHub -->
   Ehsan Akhgari,
   Ehsan Karamad,
   Eira Monstad,