Add queueMicrotask method to JSI

API/jsi/jsi/decorator.h

@@ -126,6 +126,9 @@ class RuntimeDecorator : public Base, private jsi::Instrumentation {
       const std::shared_ptr<const PreparedJavaScript>& js) override {
     return plain().evaluatePreparedJavaScript(js);
   }
+  void queueMicrotask(const jsi::Function& callback) override {
+    return plain().queueMicrotask(callback);
+  }
   bool drainMicrotasks(int maxMicrotasksHint) override {
     return plain().drainMicrotasks(maxMicrotasksHint);
   }
@@ -544,6 +547,10 @@ class WithRuntimeDecorator : public RuntimeDecorator<Plain, Base> {
     Around around{with_};
     return RD::evaluatePreparedJavaScript(js);
   }
+  void queueMicrotask(const Function& callback) override {
+    Around around{with_};
+    RD::queueMicrotask(callback);
+  }
   bool drainMicrotasks(int maxMicrotasksHint) override {
     Around around{with_};
     return RD::drainMicrotasks(maxMicrotasksHint);

API/jsi/jsi/jsi.cpp

@@ -87,6 +87,10 @@ NativeState::~NativeState() {}
 
 Runtime::~Runtime() {}
 
+void Runtime::queueMicrotask(const jsi::Function& /*callback*/) {
+  throw JSINativeException("queueMicrotask is not implemented in this runtime");
+}
+
 Instrumentation& Runtime::instrumentation() {
   class NoInstrumentation : public Instrumentation {
     std::string getRecordedGCStats() override {

API/jsi/jsi/jsi.h

@@ -209,6 +209,13 @@ class JSI_EXPORT Runtime {
   virtual Value evaluatePreparedJavaScript(
       const std::shared_ptr<const PreparedJavaScript>& js) = 0;
 
+  /// Queues a microtask in the JavaScript VM internal Microtask (a.k.a. Job in
+  /// ECMA262) queue, to be executed when the host drains microtasks in
+  /// its event loop implementation.
+  ///
+  /// \param callback a function to be executed as a microtask.
+  virtual void queueMicrotask(const jsi::Function& callback);
+
   /// Drain the JavaScript VM internal Microtask (a.k.a. Job in ECMA262) queue.
   ///
   /// \param maxMicrotasksHint a hint to tell an implementation that it should