Added type definition for delegated-events (#35006)

types/delegated-events/delegated-events-tests.ts

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+// Tests are re-used based on `delegated-events`'s flow tests.
+// https://github.com/dgraham/delegated-events/blob/master/test/test-flow.js
+
+import { on, off, fire } from "delegated-events";
+
+function onButtonClick(event: Event) {
+    event.target;
+}
+
+on("click"); // $ExpectError
+on("click", ".js-button"); // $ExpectError
+on("click", ".js-button", onButtonClick); // $ExpectType void
+
+off("click"); // $ExpectError
+off("click", ".js-button"); // $ExpectError
+off("click", ".js-button", onButtonClick); // $ExpectType void
+
+// $ExpectType void
+on("robot:singularity", ".js-robot-image", (event: Event) => {
+    event.target;
+});
+
+const image = document.querySelector(".js-button");
+
+if (image) {
+    fire(image); // $ExpectError
+    fire(image, "robot:singularity"); // $ExpectType boolean
+    fire(image, "robot:singularity", { name: "Hubot" }); // $ExpectType boolean
+}

types/delegated-events/index.d.ts

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+// Type definitions for delegated-events 1.0
+// Project: https://github.com/dgraham/delegated-events#readme
+// Definitions by: Christopher Parsons <https://github.com/cwparsons>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+// Definitions based on the projects' flow definitions.
+// https://github.com/dgraham/delegated-events/blob/master/delegated-events.js.flow
+
+export interface EventListenerOptions {
+    capture?: boolean;
+}
+
+export function on(
+    name: string,
+    selector: string,
+    handler: EventListenerOrEventListenerObject,
+    options?: EventListenerOptions
+): void;
+
+export function off(
+    name: string,
+    selector: string,
+    handler: EventListenerOrEventListenerObject,
+    options?: EventListenerOptions
+): void;
+
+export function fire(target: EventTarget, name: string, detail?: any): boolean;

types/delegated-events/tsconfig.json

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

types/delegated-events/tslint.json

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+{ "extends": "dtslint/dt.json" }