feat(sonar-js): new definition file (DefinitelyTyped#46486)

- definition file
- tests

https://github.com/brandonweiss/sonar-js

Thanks!

types/sonar-js/index.d.ts

@@ -0,0 +1,28 @@
+// Type definitions for sonar-js 1.1
+// Project: https://github.com/brandonweiss/sonar-js
+// Definitions by: Piotr Błażejewicz <https://github.com/peterblazejewicz>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export as namespace Sonar;
+
+/**
+ * A tiny library for detecting when a browser is scrolled to the bottom of a web page.
+ *
+ * You could use this, for example, on a blog to show a popover when a reader has finished a post,
+ * letting them know they can receive new posts by email if they submit their email address.
+ */
+declare class Sonar {
+    withinRangeOfPageBottom?: boolean;
+
+    constructor(window: Window);
+
+    ping(range: number, bottomFoundCallback?: Sonar.SonarCallback, bottomLostCallback?: Sonar.SonarCallback): void;
+
+    stop(): void;
+}
+
+declare namespace Sonar {
+    type SonarCallback = () => void;
+}
+
+export = Sonar;

types/sonar-js/sonar-js-tests.ts

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+import Sonar = require('sonar-js');
+
+const sonar = new Sonar(window);
+
+const withinRangeOfPageBottom = () => {
+    document.querySelector('.popover')!.classList.remove('hidden');
+};
+
+const notWithinRangeOfPageBottom = () => {
+    document.querySelector('.popover')!.classList.add('hidden');
+};
+
+sonar.ping(600, withinRangeOfPageBottom, notWithinRangeOfPageBottom);

types/sonar-js/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",
+        "sonar-js-tests.ts"
+    ]
+}

types/sonar-js/tslint.json

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