1 files changed, 112 insertions, 0 deletions
diff --git a/ext/webidl/00_webidl.js b/ext/webidl/00_webidl.js
index 4f51edfed..a71993c87 100644
--- a/ext/webidl/00_webidl.js
+++ b/ext/webidl/00_webidl.js
@@ -61,6 +61,14 @@
     ReflectOwnKeys,
     RegExpPrototypeTest,
     Set,
+    SetPrototypeEntries,
+    SetPrototypeForEach,
+    SetPrototypeKeys,
+    SetPrototypeValues,
+    SetPrototypeHas,
+    SetPrototypeClear,
+    SetPrototypeDelete,
+    SetPrototypeAdd,
     // TODO(lucacasonato): add SharedArrayBuffer to primordials
     // SharedArrayBuffer,
     String,
@@ -1048,6 +1056,108 @@
     });
   }
 
+  const setlikeInner = Symbol("[[set]]");
+
+  // Ref: https://webidl.spec.whatwg.org/#es-setlike
+  function setlike(obj, objPrototype, readonly) {
+    ObjectDefineProperties(obj, {
+      size: {
+        configurable: true,
+        enumerable: true,
+        get() {
+          assertBranded(this, objPrototype);
+          return obj[setlikeInner].size;
+        },
+      },
+      [SymbolIterator]: {
+        configurable: true,
+        enumerable: false,
+        writable: true,
+        value() {
+          assertBranded(this, objPrototype);
+          return obj[setlikeInner][SymbolIterator]();
+        },
+      },
+      entries: {
+        configurable: true,
+        enumerable: true,
+        writable: true,
+        value() {
+          assertBranded(this, objPrototype);
+          return SetPrototypeEntries(obj[setlikeInner]);
+        },
+      },
+      keys: {
+        configurable: true,
+        enumerable: true,
+        writable: true,
+        value() {
+          assertBranded(this, objPrototype);
+          return SetPrototypeKeys(obj[setlikeInner]);
+        },
+      },
+      values: {
+        configurable: true,
+        enumerable: true,
+        writable: true,
+        value() {
+          assertBranded(this, objPrototype);
+          return SetPrototypeValues(obj[setlikeInner]);
+        },
+      },
+      forEach: {
+        configurable: true,
+        enumerable: true,
+        writable: true,
+        value(callbackfn, thisArg) {
+          assertBranded(this, objPrototype);
+          return SetPrototypeForEach(obj[setlikeInner], callbackfn, thisArg);
+        },
+      },
+      has: {
+        configurable: true,
+        enumerable: true,
+        writable: true,
+        value(value) {
+          assertBranded(this, objPrototype);
+          return SetPrototypeHas(obj[setlikeInner], value);
+        },
+      },
+    });
+
+    if (!readonly) {
+      ObjectDefineProperties(obj, {
+        add: {
+          configurable: true,
+          enumerable: true,
+          writable: true,
+          value(value) {
+            assertBranded(this, objPrototype);
+            return SetPrototypeAdd(obj[setlikeInner], value);
+          },
+        },
+        delete: {
+          configurable: true,
+          enumerable: true,
+          writable: true,
+          value(value) {
+            assertBranded(this, objPrototype);
+            return SetPrototypeDelete(obj[setlikeInner], value);
+          },
+        },
+        clear: {
+          configurable: true,
+          enumerable: true,
+          writable: true,
+          value() {
+            assertBranded(this, objPrototype);
+            return SetPrototypeClear(obj[setlikeInner]);
+          },
+        },
+      });
+    }
+  }
+
   window.__bootstrap ??= {};
   window.__bootstrap.webidl = {
     type,
@@ -1068,5 +1178,7 @@
     illegalConstructor,
     mixinPairIterable,
     configurePrototype,
+    setlike,
+    setlikeInner,
   };
 })(this);