Add types for simulant (#41638)

types/simulant/index.d.ts

@@ -0,0 +1,14 @@
+// Type definitions for simulant 0.2
+// Project: https://github.com/Rich-Harris/simulant#readme
+// Definitions by: Elizabeth Craig <https://github.com/ecraig12345>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace event {
+    function fire(el: Node, e: Event): void;
+    function fire(el: Node, e: string, payload?: { [key: string]: any }): void;
+}
+
+declare function event(eventName: string, payload?: { [key: string]: any }): Event;
+declare function event(window: Window, eventName: string, payload?: { [key: string]: any }): Event;
+
+export = event;

types/simulant/simulant-tests.ts

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+import * as simulant from 'simulant';
+
+simulant(window, 'click'); // $ExpectType Event
+simulant(window, 'click', { foo: 'bar' }); // $ExpectType Event
+
+simulant('click'); // $ExpectType Event
+simulant('click', { foo: 'bar' }); // $ExpectType Event
+
+const div = document.createElement('div');
+
+simulant.fire(document, new MouseEvent('click')); // $ExpectType void
+simulant.fire(div, new MouseEvent('click')); // $ExpectType void
+
+simulant.fire(document, 'click'); // $ExpectType void
+simulant.fire(div, 'click'); // $ExpectType void
+simulant.fire(div, 'click', { foo: 'bar' }); // $ExpectType void

types/simulant/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "simulant-tests.ts"
+    ]
+}

types/simulant/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }