Merge branch 'master' into debug-component-thrashing

compat/src/index.js

@@ -358,6 +358,7 @@ function memo(c, comparer) {
 		this.shouldComponentUpdate = shouldUpdate;
 		return h(c, assign({}, props));
 	}
+	Memoed.prototype.isReactComponent = true;
 	Memoed.displayName = 'Memo(' + (c.displayName || c.name) + ')';
 	Memoed._forwarded = true;
 	return Memoed;
@@ -389,6 +390,7 @@ function forwardRef(fn) {
 		delete props.ref;
 		return fn(props, ref);
 	}
+	Forwarded.prototype.isReactComponent = true;
 	Forwarded._forwarded = true;
 	Forwarded.displayName = 'ForwardRef(' + (fn.displayName || fn.name) + ')';
 	return Forwarded;

compat/test/browser/forwardRef.test.js

@@ -16,6 +16,11 @@ describe('forwardRef', () => {
 		teardown(scratch);
 	});
 
+	it('should have isReactComponent flag', () => {
+		let App = forwardRef((_, ref) => <div ref={ref}>foo</div>);
+		expect(App.prototype.isReactComponent).to.equal(true);
+	});
+
 	it('should pass ref with createRef', () => {
 		let App = forwardRef((_, ref) => <div ref={ref}>foo</div>);
 		let ref = createRef();

compat/test/browser/memo.test.js

@@ -16,6 +16,11 @@ describe('memo()', () => {
 		teardown(scratch);
 	});
 
+	it('should have isReactComponent flag', () => {
+		let App = memo(() => <div>foo</div>);
+		expect(App.prototype.isReactComponent).to.equal(true);
+	});
+
 	it('should work with function components', () => {
 		let spy = sinon.spy();
 

package.json

@@ -21,7 +21,6 @@
     "dev:hooks": "microbundle watch --raw --format cjs --cwd hooks",
     "dev:compat": "microbundle watch --raw --format cjs --cwd compat --globals 'preact/hooks=preactHooks'",
     "test": "npm-run-all lint build --parallel test:mocha test:karma test:ts",
-    "test:flow": "flow check",
     "test:ts": "tsc -p test/ts/ && mocha --require babel-register test/ts/**/*-test.js",
     "test:mocha": "mocha --recursive --require babel-register test/shared test/node",
     "test:karma": "cross-env COVERAGE=true karma start karma.conf.js --single-run",
@@ -125,7 +124,6 @@
     "eslint": "5.15.1",
     "eslint-config-developit": "^1.1.1",
     "eslint-plugin-react": "7.12.4",
-    "flow-bin": "^0.79.1",
     "karma": "^3.0.0",
     "karma-babel-preprocessor": "^7.0.0",
     "karma-chai-sinon": "^0.1.5",

src/internal.d.ts

@@ -52,6 +52,7 @@ export interface VNode<P = {}> extends preact.VNode<P> {
 	 */
 	_lastDomChild: PreactElement | Text | null;
 	_component: Component | null;
+	constructor: undefined;
 }
 
 export interface Component<P = {}, S = {}> extends preact.Component<P, S> {