Added type definitions for elv (#34153)

types/elv/elv-tests.ts

@@ -0,0 +1,14 @@
+import elv = require('elv');
+
+elv(''); // $ExpectType boolean
+
+elv.behavior.enableFalse; // $ExpectedType boolean
+elv.behavior.enableNaN; // $ExpectedType boolean
+elv.behavior.enableNull; // $ExpectedType boolean
+elv.behavior.enableUndefined; // $ExpectedType boolean
+
+elv.coalesce(''); // $ExpectType any
+elv.ncoalesce(''); // $ExpectType any
+elv.populated(''); // $ExpectType boolean
+elv.tryGet([], 0); // $ExpectType any
+elv.tryGet([], 0, ''); // $ExpectType any

types/elv/index.d.ts

@@ -0,0 +1,21 @@
+// Type definitions for elv 2.2
+// Project: https://github.com/dsfields/elv#readme
+// Definitions by: Gary Parker <https://github.com/garyaparker>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function elv(val: any): boolean;
+
+declare namespace elv {
+    const behavior: {
+        enableFalse: boolean
+        enableNaN: boolean
+        enableNull: boolean
+        enableUndefined: boolean
+    };
+    function coalesce(...args: any[]): any;
+    function ncoalesce(...args: any[]): any;
+    function populated(val: any): boolean;
+    function tryGet(val: ReadonlyArray<any>, index: number, def?: any): any;
+}
+
+export = elv;

types/elv/tsconfig.json

@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "allowSyntheticDefaultImports": true,
+        "strictFunctionTypes": true
+    },
+    "files": [
+        "index.d.ts",
+        "elv-tests.ts"
+    ]
+}

types/elv/tslint.json

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