Added type definitions for Parcel bundler (#29302)

Using this page https://en.parceljs.org/api.html

types/parcel-bundler/index.d.ts

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+// Type definitions for parcel-bundler 1.10
+// Project: https://github.com/parcel-bundler/parcel#readme
+// Definitions by: pinage404 <https://github.com/pinage404>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+declare namespace ParcelBundler {
+    interface ParcelOptions {
+        /**
+         * The out directory to put the build files in
+         *
+         * @default "./dist"
+         */
+        outDir?: string;
+        /**
+         * The name of the outputFile
+         *
+         * @default "index.html"
+         */
+        outFile?: string;
+        /**
+         * The url to server on
+         *
+         * @default "./"
+         */
+        publicUrl?: string;
+        /**
+         * Whether to watch the files and rebuild them on change
+         *
+         * @default process.env.NODE_ENV !== 'production'
+         */
+        watch?: boolean;
+        /**
+         * Enabled or disables caching
+         *
+         * @default true
+         */
+        cache?: boolean;
+        /**
+         * The directory cache gets put in
+         *
+         * @default ".cache"
+         */
+        cacheDir?: string;
+        /**
+         * Disable content hash from being included on the filename
+         *
+         * @default false
+         */
+        contentHash?: boolean;
+        /**
+         * Minify files
+         *
+         * @default process.env.NODE_ENV === 'production'
+         */
+        minify?: boolean;
+        /**
+         * Turn on experimental scope hoisting/tree shaking flag, for smaller production bundles
+         *
+         * @default false
+         */
+        scopeHoist?: boolean;
+        /**
+         * @default "browser"
+         */
+        target?: "browser" | "node" | "electron";
+        /**
+         * Define a custom {key, cert} pair
+         *
+         * Use true to generate one or false to use http
+         */
+        https?:
+            | true
+            | false
+            | {
+                  /**
+                   * Path to custom certificate
+                   *
+                   * @default "./ssl/c.crt"
+                   */
+                  cert?: string;
+                  /**
+                   * Path to custom key
+                   *
+                   * @default "./ssl/k.key"
+                   */
+                  key?: string;
+              };
+        /**
+         * 3 = log everything, 2 = log warnings & errors, 1 = log errors
+         *
+         * @default 3
+         */
+        logLevel?: 3 | 2 | 1;
+        /**
+         * The port the HMR socket runs on
+         *
+         * Defaults to a random free port (0 in node.js resolves to a random free port)
+         *
+         * @default 0
+         */
+        hmrPort?: 0 | number;
+        /**
+         * Enable or disable sourcemaps
+         *
+         * Defaults to enabled (not supported in minified builds yet)
+         *
+         * @default true
+         */
+        sourceMaps?: boolean;
+        /**
+         * A hostname for hot module reload
+         *
+         * @default ""
+         */
+        hmrHostname?: string;
+        /**
+         * Prints a detailed report of the bundles, assets, filesizes and times
+         *
+         * Reports are only printed if watch is disabled
+         *
+         * @default false
+         */
+        detailedReport?: boolean;
+    }
+
+    type ParcelAsset = any;
+
+    interface ParcelBundle {
+        /**
+         * The type of assets it contains (e.g. js, css, map, ...)
+         */
+        type: string;
+        /**
+         * The name of the bundle (generated using Asset.generateBundleName() of entryAsset)
+         */
+        name: string;
+        /**
+         * The parent bundle, is null in case of the entry bundleany
+         */
+        parentBundle?: any;
+        /**
+         * The entryPoint of the bundle, used for generating the name and gathering assets.
+         */
+        entryAsset: any;
+        /**
+         * A Set of all assets inside the bundle
+         */
+        assets: Set<any>;
+        /**
+         * A Set of all sibling bundles
+         */
+        siblingBundles: Set<any>;
+        /**
+         * A Map<String(Type: js, css, map, ...), Bundle> of all sibling bundles
+         */
+        siblingBundlesMap: Map<string, ParcelBundle>;
+        /**
+         * A Map<Asset, number(line number inside the bundle)> of all the locations of the assets inside the bundle, used to generate accurate source maps
+         */
+        offsets: Map<ParcelAsset, number>;
+    }
+}
+
+declare class ParcelBundler {
+    constructor(
+        entryFiles?: string | string[],
+        options?: ParcelBundler.ParcelOptions
+    );
+
+    bundle(): Promise<ParcelBundler.ParcelBundle>;
+}
+
+export = ParcelBundler;

types/parcel-bundler/parcel-bundler-tests.ts

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+import ParcelBundler, { ParcelOptions } from "parcel-bundler";
+
+const parcelOption: ParcelOptions = { watch: false };
+
+const files = ["./index.d.ts"];
+
+const bundler = new ParcelBundler(files, parcelOption);
+
+bundler.bundle().then(bundle => bundle.name);

types/parcel-bundler/tsconfig.json

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

types/parcel-bundler/tslint.json

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