add polyfill-service types

types/polyfill-service/index.d.ts

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+// Type definitions for polyfill-service 3.25
+// Project: https://github.com/financial-times/polyfill-service#readme
+// Definitions by: Arturas Molcanovas <https://github.com/Alorel>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+export type PolyfillFlag = 'gated' | 'always';
+export type Unknown = 'polyfill' | 'ignore';
+
+export interface Feature {
+    flags?: PolyfillFlag[];
+}
+
+export interface Features {
+    [feature: string]: Feature;
+}
+
+export interface GetPolyfillsOptions {
+    uaString: string;
+    features?: Features;
+    excludes?: string[];
+}
+
+export interface GetPolyfillStringOptions extends GetPolyfillsOptions {
+    minify?: boolean;
+    unknown?: Unknown;
+}
+
+export interface PolyfillSpec {
+    aliasOf?: Set<string>;
+    flags: Set<PolyfillFlag>;
+}
+
+export interface GetPolyfillsResponse {
+    [name: string]: PolyfillSpec;
+}
+
+export function listAllPolyfills(): Promise<ReadonlyArray<string>>;
+
+export function getPolyfillString(options: GetPolyfillsOptions): Promise<string>;
+
+export function getPolyfills(options: GetPolyfillsOptions): Promise<GetPolyfillsResponse>;

types/polyfill-service/polyfill-service-tests.ts

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+import * as svc from 'polyfill-service';
+
+const o: svc.GetPolyfillsOptions = {
+    uaString: ''
+};
+
+o.excludes = ['foo'];
+o.features = {
+    foo: {},
+    bar: {flags: ['gated', 'always']}
+};
+
+const o2: svc.GetPolyfillStringOptions = {
+    uaString: ''
+};
+
+o2.excludes = ['foo'];
+o2.features = {
+    foo: {},
+    bar: {flags: ['gated', 'always']}
+};
+o2.minify = true;
+o2.minify = false;
+o2.unknown = 'polyfill';
+o2.unknown = 'ignore';
+
+svc.listAllPolyfills().then(v => {
+    v[0].toLocaleLowerCase();
+});
+
+svc.getPolyfillString(o2).then(s => {
+    s.toLocaleUpperCase();
+});
+
+svc.getPolyfills(o).then(r => {
+    const p = r.Symbol;
+    p.flags.clear();
+
+    const a = p.aliasOf;
+    if (a) {
+        a.clear();
+    }
+});

types/polyfill-service/tsconfig.json

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

types/polyfill-service/tslint.json

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