diff --git a/katex/katex-tests.ts b/katex/katex-tests.ts
new file mode 100644
index 0000000000..9829fcddf7
--- /dev/null
+++ b/katex/katex-tests.ts
@@ -0,0 +1,18 @@
+/// <reference path="katex.d.ts" />
+
+import katexLib = require('katex');
+
+class KatexTest {
+	constructor() {
+		katexLib.render('My Latex String', document.createElement('div'));
+
+		try {
+			let options: katexLib.KatexOptions = { breakOnUnsupportedCmds: true };
+			let value: string = katexLib.renderToString('My Latex String', options);
+		} catch (error) {
+			if (error instanceof katexLib.ParseError) {
+				//do something with this error
+			}
+		}
+	}
+}
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diff --git a/katex/katex.d.ts b/katex/katex.d.ts
new file mode 100644
index 0000000000..6d139ded13
--- /dev/null
+++ b/katex/katex.d.ts
@@ -0,0 +1,33 @@
+// Type definitions for KaTeX v.0.5.0
+// Project: http://khan.github.io/KaTeX/
+// Definitions by: Michael Randolph <https://github.com/mrand01>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module "katex" {
+	interface KatexOptions {
+		displayMode?: boolean;
+		breakOnUnsupportedCmds?: boolean;
+		errorColor?: string;
+	}
+
+	class ParseError implements Error {
+		constructor(message: string, lexer: any, position: number);
+		name: string;
+		message: string;
+		position: number;
+	}
+	
+	/**
+	 * Renders a TeX expression into the specified DOM element
+	 * @param tex A TeX expression
+	 * @param element The DOM element to render into
+	 * @param options KaTeX options
+	 */
+	function render(tex: string, element: HTMLElement, options?:KatexOptions): void;
+	/**
+	 * Renders a TeX expression into an HTML string
+	 * @param tex A TeX expression
+	 * @param options KaTeX options
+	 */
+	function renderToString(tex: string, options?:KatexOptions): string;
+}
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