Add types for sax-stream (#41339)

types/sax-stream/index.d.ts

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+// Type definitions for sax-stream 1.3
+// Project: https://github.com/melitele/sax-stream
+// Definitions by: Michael de Wit <https://github.com/mjwwit>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+import stream = require("stream");
+
+declare namespace saxStream {
+    interface Options {
+        /**
+         * Name of the tag to select objects from XML file, an Array of tag names can be used -
+         * when multiple tags are specified stream pushes `{ tag, record }` tuples.
+         */
+        tag: string | ReadonlyArray<string>;
+        /**
+         * Size of internal transform stream buffer - defaults to 350 objects.
+         */
+        highWaterMark?: number;
+        /**
+         * Default to false, if true makes sax parser to accept valid XML only.
+         */
+        strict?: boolean;
+        /**
+         * Whether or not to trim text and comment nodes.
+         */
+        trim?: boolean;
+        /**
+         * If true, then turn any whitespace into a single space.
+         */
+        normalize?: boolean;
+        /**
+         * If true, then lowercase tag names and attribute names in loose mode, rather than uppercasing them.
+         */
+        lowercase?: boolean;
+        /**
+         * If true, then namespaces are supported.
+         */
+        xmlns?: boolean;
+        /**
+         * If false, then don't track line/col/position.
+         */
+        trackPosition?: boolean;
+        /**
+         * If true, only parse predefined XML entities (&amp;, &apos;, &gt;, &lt;, and &quot;).
+         */
+        strictEntities?: boolean;
+    }
+}
+
+declare function saxStream(options: saxStream.Options): stream.Transform;
+
+export = saxStream;

types/sax-stream/sax-stream-tests.ts

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+import saxStream = require('sax-stream');
+
+// $ExpectType Transform
+saxStream({ tag: '' });
+
+// $ExpectType Transform
+saxStream({
+    tag: '',
+    highWaterMark: 1,
+    strict: true,
+    trim: true,
+    normalize: true,
+    lowercase: true,
+    xmlns: true,
+    trackPosition: true,
+    strictEntities: true
+});
+
+// $ExpectError
+saxStream({});
+
+// $ExpectError
+saxStream();

types/sax-stream/tsconfig.json

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

types/sax-stream/tslint.json

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