diff --git a/types/a11y-dialog/a11y-dialog-tests.ts b/types/a11y-dialog/a11y-dialog-tests.ts
new file mode 100644
index 0000000000..3df694fcdd
--- /dev/null
+++ b/types/a11y-dialog/a11y-dialog-tests.ts
@@ -0,0 +1,30 @@
+import A11yDialog = require('a11y-dialog');
+
+const dialogEl = new A11yDialog(document.getElementById("test"));
+const dialogElTwo = new A11yDialog(document.getElementById("test"), document.getElementById("testContainer"));
+const dialogElThree = new A11yDialog(document.getElementById("test"), "dummy-element");
+
+dialogEl.show();
+dialogEl.hide();
+dialogElTwo.destroy();
+dialogElThree.create();
+
+// Test out interfaces that extends Element.
+dialogEl.on("show", (el: HTMLElement) => {
+    el.textContent;
+});
+
+// Test out element and event.
+dialogEl.on("create", (el: HTMLElement, evt) => {
+    el.textContent;
+
+    evt.target;
+});
+
+dialogEl.on('hide', () => {
+    const t = 5;
+});
+
+dialogEl.off("show", (el: HTMLElement) => {
+    el.textContent;
+});
diff --git a/types/a11y-dialog/index.d.ts b/types/a11y-dialog/index.d.ts
new file mode 100644
index 0000000000..105aaa70e7
--- /dev/null
+++ b/types/a11y-dialog/index.d.ts
@@ -0,0 +1,31 @@
+// Type definitions for a11y-dialog 5.2
+// Project: https://github.com/edenspiekermann/a11y-dialog
+// Definitions by: Yuto <https://github.com/Goyatuzo>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+type DialogEvents = "show" | "hide" | "destroy" | "create";
+declare class A11yDialog {
+    constructor(el: Element | null, containers?: NodeList | Element | string | null);
+    /**
+     * Shows the dialog.
+     */
+    show(): void;
+    /**
+     * Hides the dialog.
+     */
+    hide(): void;
+    /**
+     * Unbind click listeners from dialog openers and closers and remove all bound custom event listeners registered with `.on()`
+     */
+    destroy(): void;
+    /**
+     * Bind click listeners to dialog openers and closers.
+     */
+    create(el?: Element | null, containers?: NodeList | Element | string | null): void;
+
+    on(evt: DialogEvents, callback: (dialogElement: any, event: Event) => void): void;
+    off(evt: DialogEvents, callback: (dialogElement: any, event: Event) => void): void;
+}
+
+export = A11yDialog;
diff --git a/types/a11y-dialog/tsconfig.json b/types/a11y-dialog/tsconfig.json
new file mode 100644
index 0000000000..a27d99d6bf
--- /dev/null
+++ b/types/a11y-dialog/tsconfig.json
@@ -0,0 +1,25 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "jsx": "react"
+    },
+    "files": [
+        "index.d.ts",
+        "a11y-dialog-tests.ts"
+    ]
+}
\ No newline at end of file
diff --git a/types/a11y-dialog/tslint.json b/types/a11y-dialog/tslint.json
new file mode 100644
index 0000000000..e60c15844f
--- /dev/null
+++ b/types/a11y-dialog/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
\ No newline at end of file