Add types. Fix tsd check env. Improve in-code doc comments

src/clipboard.d.ts

@@ -2,11 +2,7 @@
 
 type Action = 'cut' | 'copy';
 type Response = 'success' | 'error';
-
-type Options = {
-  text?: string;
-  action?: Action;
-  target?: Element;
+type CopyActionOptions = {
   container?: Element;
 };
 
@@ -38,6 +34,17 @@ declare class ClipboardJS {
    * Checks if clipboard.js is supported
    */
   static isSupported(): boolean;
+
+
+  /**
+   * Fires a copy action
+   */
+   static copy(target: string | Element, options: CopyActionOptions): string;
+
+   /**
+   * Fires a cut action
+   */
+  static cut(target: string | Element): string;
 }
 
 declare namespace ClipboardJS {

src/clipboard.js

@@ -111,10 +111,21 @@ class Clipboard extends Emitter {
     }
   }
 
+  /**
+   * Allow fire programmatically a copy action
+   * @param {Element} target
+   * @param {Object} options
+   * @returns Text copied.
+   */
   static copy(target, options = { container: document.body }) {
     return ClipboardActionCopy(target, options);
   }
 
+  /**
+   * Allow fire programmatically a cut action
+   * @param {Element} target
+   * @returns Text cutted.
+   */
   static cut(target) {
     return ClipboardActionCut(target);
   }

src/clipboard.test-d.ts

@@ -1,4 +1,4 @@
 import { expectType } from 'tsd';
-import Clipboard from './clipboard';
+import * as Clipboard from './clipboard';
 
 expectType<Clipboard>(new Clipboard('.btn'));