Merge pull request #32269 from BendingBender/is-progressive

[is-progressive] Add types

types/is-progressive/index.d.ts

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+// Type definitions for is-progressive 3.0
+// Project: https://github.com/sindresorhus/is-progressive#readme
+// Definitions by: BendingBender <https://github.com/BendingBender>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+import { Readable } from 'stream';
+
+/**
+ * Returns whether the `buffer` is a progressive JPEG image.
+ * @param buffer Buffer of a JPEG image.
+ * Must be at least `65535` bytes when the file is larger than that.
+ */
+export function buffer(buffer: Buffer): boolean;
+
+/**
+ * Returns a Promise for a boolean indicating whether the file stream is a progressive JPEG image.
+ * @param stream Data stream.
+ */
+export function stream(stream: Readable): Promise<boolean>;
+
+/**
+ * Returns a Promise for a boolean indicating whether the file is a progressive JPEG image.
+ * @param filepath Filepath to the image.
+ */
+export function file(filepath: string): Promise<boolean>;
+
+/**
+ * Returns whether the buffer is a progressive JPEG.
+ * @param filepath Filepath to the image.
+ */
+export function fileSync(filepath: string): boolean;

types/is-progressive/is-progressive-tests.ts

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+import https = require('https');
+import isProgressive = require('is-progressive');
+
+isProgressive.file('baseline.jpg'); // $ExpectType Promise<boolean>
+
+isProgressive.fileSync('progressive.jpg'); // $ExpectType boolean
+
+https.get('/', res => {
+    isProgressive.stream(res); // $ExpectType Promise<boolean>
+});
+
+isProgressive.buffer(new Buffer(1)); // $ExpectType boolean

types/is-progressive/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",
+        "is-progressive-tests.ts"
+    ]
+}

types/is-progressive/tslint.json

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