Implement HTMLScriptElement.supports(type) method

Bug: 1245528, whatwg/html#6472 Change-Id: I9a902504cf692caa73ae7e49fd65895156bbf197 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3133553 Commit-Queue: Tsuyoshi Horo <horo@chromium.org> Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org> Cr-Commit-Position: refs/heads/main@{#918474} NOKEYCHECK=True GitOrigin-RevId: b8b24648e5716bd4e7f7cb77cb792163e8599149
mjfroman · Sep 6, 2021 · 9f181a3 · 9f181a3
1 parent 469cc53
commit 9f181a3
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diff --git a/blink/renderer/core/html/html_script_element.cc b/blink/renderer/core/html/html_script_element.cc
@@ -34,6 +34,7 @@
 #include "third_party/blink/renderer/core/html_names.h"
 #include "third_party/blink/renderer/core/script/script_loader.h"
 #include "third_party/blink/renderer/core/script/script_runner.h"
+#include "third_party/blink/renderer/core/script_type_names.h"
 #include "third_party/blink/renderer/core/trustedtypes/trusted_script.h"
 #include "third_party/blink/renderer/core/trustedtypes/trusted_types_util.h"
 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
@@ -316,6 +317,24 @@ Element& HTMLScriptElement::CloneWithoutAttributesAndChildren(
   return *factory.CreateElement(TagQName(), flags, IsValue());
 }
 
+// static
+bool HTMLScriptElement::supports(ExecutionContext* execution_context,
+                                 const AtomicString& type) {
+  if (type == script_type_names::kClassic)
+    return true;
+  if (type == script_type_names::kModule)
+    return true;
+  if (type == script_type_names::kImportmap)
+    return true;
+
+  if ((type == script_type_names::kSpeculationrules) &&
+      RuntimeEnabledFeatures::SpeculationRulesEnabled(execution_context)) {
+    return true;
+  }
+
+  return false;
+}
+
 void HTMLScriptElement::Trace(Visitor* visitor) const {
   visitor->Trace(loader_);
   HTMLElement::Trace(visitor);

diff --git a/blink/renderer/core/html/html_script_element.h b/blink/renderer/core/html/html_script_element.h
@@ -42,6 +42,8 @@ class CORE_EXPORT HTMLScriptElement final : public HTMLElement,
   DEFINE_WRAPPERTYPEINFO();
 
  public:
+  static bool supports(ExecutionContext*, const AtomicString&);
+
   HTMLScriptElement(Document&, const CreateElementFlags);
 
   // Returns attributes that should be checked against Trusted Types

diff --git a/blink/renderer/core/html/html_script_element.idl b/blink/renderer/core/html/html_script_element.idl
@@ -43,4 +43,7 @@
     // Subresource Integrity
     // https://w3c.github.io/webappsec-subresource-integrity/#HTMLScriptElement
     [Reflect] attribute DOMString integrity;
+
+    // https://html.spec.whatwg.org/multipage/scripting.html#dom-script-supports
+    [RuntimeEnabled=ScriptElementSupports, CallWith=ExecutionContext] static boolean supports(DOMString type);
 };
diff --git a/blink/renderer/platform/runtime_enabled_features.json5 b/blink/renderer/platform/runtime_enabled_features.json5
@@ -1942,6 +1942,10 @@
       name: "ScriptedSpeechSynthesis",
       status: "stable",
     },
+    {
+      name: "ScriptElementSupports",
+      status: "experimental",
+    },
     {
       name: "ScrollbarGutter",
       status: "stable",

diff --git a/...web_tests/external/wpt/html/semantics/scripting-1/the-script-element/script-supports.html b/...web_tests/external/wpt/html/semantics/scripting-1/the-script-element/script-supports.html
@@ -0,0 +1,52 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>HTMLScriptElement.supports</title>
+<link rel=help href="https://html.spec.whatwg.org/#dom-script-supports">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(function() {
+  assert_equals(typeof HTMLScriptElement.supports, 'function');
+}, 'Type of HTMLScriptElement.supports is function');
+
+test(function() {
+  assert_true(HTMLScriptElement.supports('classic'));
+}, 'HTMLScriptElement.supports resurns true for \'classic\'');
+
+test(function() {
+  assert_true(HTMLScriptElement.supports('module'));
+}, 'HTMLScriptElement.supports resurns true for \'module\'');
+
+test(function() {
+  assert_false(HTMLScriptElement.supports('application/ecmascript'));
+  assert_false(HTMLScriptElement.supports('application/javascript'));
+  assert_false(HTMLScriptElement.supports('application/x-ecmascript'));
+  assert_false(HTMLScriptElement.supports('application/x-javascript'));
+  assert_false(HTMLScriptElement.supports('text/ecmascript'));
+  assert_false(HTMLScriptElement.supports('text/javascript'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.0'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.1'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.2'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.3'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.4'));
+  assert_false(HTMLScriptElement.supports('text/javascript1.5'));
+  assert_false(HTMLScriptElement.supports('text/jscript'));
+  assert_false(HTMLScriptElement.supports('text/livescript'));
+  assert_false(HTMLScriptElement.supports('text/x-ecmascript'));
+  assert_false(HTMLScriptElement.supports('text/x-javascript'));
+}, 'HTMLScriptElement.supports returns false for JavaScript MIME types');
+
+test(function() {
+  assert_false(HTMLScriptElement.supports(''));
+  assert_false(HTMLScriptElement.supports(' '));
+  assert_false(HTMLScriptElement.supports('classic '));
+  assert_false(HTMLScriptElement.supports('module '));
+  assert_false(HTMLScriptElement.supports(' classic '));
+  assert_false(HTMLScriptElement.supports(' module '));
+  assert_false(HTMLScriptElement.supports('classics'));
+  assert_false(HTMLScriptElement.supports('modules'));
+  assert_false(HTMLScriptElement.supports('Classic'));
+  assert_false(HTMLScriptElement.supports('Module'));
+  assert_false(HTMLScriptElement.supports('unsupported'));
+}, 'HTMLScriptElement.supports returns false for unsupported types');
+</script>
diff --git a/blink/web_tests/external/wpt/import-maps/script-supports-importmap.html b/blink/web_tests/external/wpt/import-maps/script-supports-importmap.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<title>HTMLScriptElement.supports importmap</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(function() {
+  assert_true(HTMLScriptElement.supports('importmap'));
+}, 'HTMLScriptElement.supports returns true for \'importmap\'');
+
+test(function() {
+  assert_false(HTMLScriptElement.supports(' importmap'));
+  assert_false(HTMLScriptElement.supports('importmap '));
+  assert_false(HTMLScriptElement.supports('Importmap'));
+  assert_false(HTMLScriptElement.supports('ImportMap'));
+  assert_false(HTMLScriptElement.supports('importMap'));
+  assert_false(HTMLScriptElement.supports('import-map'));
+  assert_false(HTMLScriptElement.supports('importmaps'));
+  assert_false(HTMLScriptElement.supports('import-maps'));
+}, 'HTMLScriptElement.supports returns false for unsupported types');
+
+</script>
diff --git a/blink/web_tests/webexposed/global-interface-listing-expected.txt b/blink/web_tests/webexposed/global-interface-listing-expected.txt
@@ -4137,6 +4137,7 @@ interface HTMLQuoteElement : HTMLElement
     method constructor
     setter cite
 interface HTMLScriptElement : HTMLElement
+    static method supports
     attribute @@toStringTag
     getter async
     getter charset

diff --git a/blink/web_tests/wpt_internal/prerender/script-supports-speculationrules.html b/blink/web_tests/wpt_internal/prerender/script-supports-speculationrules.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<title>HTMLScriptElement.supports speculationrules</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<meta name="timeout" content="long">
+<script>
+test(function() {
+  assert_true(HTMLScriptElement.supports('speculationrules'));
+}, 'HTMLScriptElement.supports returns true for \'speculationrules\'');
+
+test(function() {
+  assert_false(HTMLScriptElement.supports(' speculationrules'));
+  assert_false(HTMLScriptElement.supports('speculationrules '));
+  assert_false(HTMLScriptElement.supports('Speculationrules'));
+  assert_false(HTMLScriptElement.supports('SpeculationRules'));
+  assert_false(HTMLScriptElement.supports('speculationRules'));
+  assert_false(HTMLScriptElement.supports('speculation-rules'));
+}, 'HTMLScriptElement.supports returns false for unsupported types');
+
+</script>