diff --git a/src/components/action-sheet/action-sheet-component.ts b/src/components/action-sheet/action-sheet-component.ts
index d45526cfa0..7de66952c8 100644
--- a/src/components/action-sheet/action-sheet-component.ts
+++ b/src/components/action-sheet/action-sheet-component.ts
@@ -1,5 +1,6 @@
 import { Component, ElementRef, HostListener, Renderer, ViewEncapsulation } from '@angular/core';
 
+import { ActionSheetOptions, ActionSheetButton } from './action-sheet-options';
 import { assert } from '../../util/util';
 import { BlockerDelegate, GestureController, BLOCK_ALL } from '../../gestures/gesture-controller';
 import { Config } from '../../config/config';
@@ -26,10 +27,10 @@ import { ViewController } from '../../navigation/view-controller';
             '{{b.text}}' +
           '</button>' +
         '</div>' +
-        '<div class="action-sheet-group" *ngIf="d.cancelButton">' +
-          '<button ion-button="action-sheet-button" (click)="click(d.cancelButton)" class="action-sheet-cancel disable-hover" [attr.icon-left]="d.cancelButton.icon ? \'\' : null" [ngClass]="d.cancelButton.cssClass">' +
-            '<ion-icon [name]="d.cancelButton.icon" *ngIf="d.cancelButton.icon" class="action-sheet-icon"></ion-icon>' +
-            '{{d.cancelButton.text}}' +
+        '<div class="action-sheet-group" *ngIf="cancelButton">' +
+          '<button ion-button="action-sheet-button" (click)="click(cancelButton)" class="action-sheet-cancel disable-hover" [attr.icon-left]="cancelButton.icon ? \'\' : null" [ngClass]="cancelButton.cssClass">' +
+            '<ion-icon [name]="cancelButton.icon" *ngIf="cancelButton.icon" class="action-sheet-icon"></ion-icon>' +
+            '{{cancelButton.text}}' +
           '</button>' +
         '</div>' +
       '</div>' +
@@ -41,15 +42,11 @@ import { ViewController } from '../../navigation/view-controller';
   },
   encapsulation: ViewEncapsulation.None,
 })
+
 export class ActionSheetCmp {
-  d: {
-    title?: string;
-    subTitle?: string;
-    cssClass?: string;
-    buttons?: Array<any>;
-    enableBackdropDismiss?: boolean;
-    cancelButton: any;
-  };
+
+  d: ActionSheetOptions;
+  cancelButton: ActionSheetButton;
   descId: string;
   enabled: boolean;
   hdrId: string;
@@ -89,30 +86,26 @@ export class ActionSheetCmp {
 
   ionViewDidLoad() {
     // normalize the data
-    let buttons: any[] = [];
-
-    this.d.buttons.forEach((button: any) => {
+    this.d.buttons = this.d.buttons.map(button => {
       if (typeof button === 'string') {
         button = { text: button };
       }
       if (!button.cssClass) {
         button.cssClass = '';
       }
-
-      if (button.role === 'cancel') {
-        this.d.cancelButton = button;
-
-      } else {
-        if (button.role === 'destructive') {
+      switch (button.role) {
+        case 'cancel':
+          this.cancelButton = button;
+          return null;
+        case 'destructive':
           button.cssClass = (button.cssClass + ' ' || '') + 'action-sheet-destructive';
-        } else if (button.role === 'selected') {
+          break;
+        case 'selected':
           button.cssClass = (button.cssClass + ' ' || '') + 'action-sheet-selected';
-        }
-        buttons.push(button);
+          break;
       }
-    });
-
-    this.d.buttons = buttons;
+      return button;
+    }).filter(button => button !== null);
   }
 
   ionViewWillEnter() {
@@ -141,7 +134,7 @@ export class ActionSheetCmp {
     }
   }
 
-  click(button: any) {
+  click(button: ActionSheetButton) {
     if (!this.enabled) {
       return;
     }
@@ -163,8 +156,8 @@ export class ActionSheetCmp {
 
   bdClick() {
     if (this.enabled && this.d.enableBackdropDismiss) {
-      if (this.d.cancelButton) {
-        this.click(this.d.cancelButton);
+      if (this.cancelButton) {
+        this.click(this.cancelButton);
 
       } else {
         this.dismiss('backdrop');
@@ -172,7 +165,7 @@ export class ActionSheetCmp {
     }
   }
 
-  dismiss(role: any): Promise<any> {
+  dismiss(role: string): Promise<any> {
     const opts: NavOptions = {
       minClickBlockDuration: 400
     };
@@ -181,7 +174,7 @@ export class ActionSheetCmp {
 
   ngOnDestroy() {
     assert(this.gestureBlocker.blocked === false, 'gesture blocker must be already unblocked');
-    this.d = null;
+    this.d = this.cancelButton = null;
     this.gestureBlocker.destroy();
   }
 }
diff --git a/src/components/action-sheet/action-sheet-options.ts b/src/components/action-sheet/action-sheet-options.ts
index 669367262e..6ff277df9a 100644
--- a/src/components/action-sheet/action-sheet-options.ts
+++ b/src/components/action-sheet/action-sheet-options.ts
@@ -3,6 +3,14 @@ export interface ActionSheetOptions {
   title?: string;
   subTitle?: string;
   cssClass?: string;
-  buttons?: Array<any>;
+  buttons?: (ActionSheetButton|string)[];
   enableBackdropDismiss?: boolean;
 }
+
+export interface ActionSheetButton {
+  text?: string;
+  role?: string;
+  icon?: string;
+  cssClass?: string;
+  handler?: () => boolean|void;
+};
diff --git a/src/components/action-sheet/action-sheet.ts b/src/components/action-sheet/action-sheet.ts
index 39a0ccf2a5..cb54c5cec0 100644
--- a/src/components/action-sheet/action-sheet.ts
+++ b/src/components/action-sheet/action-sheet.ts
@@ -1,5 +1,5 @@
 import { ActionSheetCmp } from './action-sheet-component';
-import { ActionSheetOptions } from './action-sheet-options';
+import { ActionSheetOptions, ActionSheetButton } from './action-sheet-options';
 import { ActionSheetSlideIn, ActionSheetMdSlideIn, ActionSheetSlideOut, ActionSheetMdSlideOut, ActionSheetWpSlideIn, ActionSheetWpSlideOut } from './action-sheet-transitions';
 import { App } from '../app/app';
 import { Config } from '../../config/config';
@@ -34,7 +34,7 @@ export class ActionSheet extends ViewController {
    * @hidden
    */
   getTransitionName(direction: string): string {
-    let key = 'actionSheet' + (direction === 'back' ? 'Leave' : 'Enter');
+    const key = 'actionSheet' + (direction === 'back' ? 'Leave' : 'Enter');
     return this._nav && this._nav.config.get(key);
   }
 
@@ -57,7 +57,7 @@ export class ActionSheet extends ViewController {
   /**
    * @param {object} button Action sheet button
    */
-  addButton(button: any): ActionSheet {
+  addButton(button: ActionSheetButton|string): ActionSheet {
     this.data.buttons.push(button);
     return this;
   }
diff --git a/src/components/alert/alert-component.ts b/src/components/alert/alert-component.ts
index 756e2c6b5b..7fde84ad97 100644
--- a/src/components/alert/alert-component.ts
+++ b/src/components/alert/alert-component.ts
@@ -295,7 +295,7 @@ export class AlertCmp {
     }
   }
 
-  dismiss(role: any): Promise<any> {
+  dismiss(role: string): Promise<any> {
     const opts: NavOptions = {
       minClickBlockDuration: 400
     };
diff --git a/src/components/alert/test/basic/pages/page-one/page-one.ts b/src/components/alert/test/basic/pages/page-one/page-one.ts
index 815b8328de..f111cecef4 100644
--- a/src/components/alert/test/basic/pages/page-one/page-one.ts
+++ b/src/components/alert/test/basic/pages/page-one/page-one.ts
@@ -158,7 +158,7 @@ export class PageOne {
       this.testPromptOpen = true;
     });
 
-    alert.onDidDismiss((data: any, role: any) => {
+    alert.onDidDismiss((data, role) => {
       console.log('onDidDismiss, data:', data, 'role:', role);
     });
   }
diff --git a/src/components/loading/loading-component.ts b/src/components/loading/loading-component.ts
index 5b088a9069..714839dde4 100644
--- a/src/components/loading/loading-component.ts
+++ b/src/components/loading/loading-component.ts
@@ -87,7 +87,7 @@ export class LoadingCmp {
 
   }
 
-  dismiss(role: any): Promise<any> {
+  dismiss(role: string): Promise<any> {
     if (this.durationTimeout) {
       clearTimeout(this.durationTimeout);
     }
diff --git a/src/components/picker/picker-component.ts b/src/components/picker/picker-component.ts
index 6207f1b900..3bafcf4b49 100644
--- a/src/components/picker/picker-component.ts
+++ b/src/components/picker/picker-component.ts
@@ -205,7 +205,7 @@ export class PickerCmp {
     }
   }
 
-  dismiss(role: any): Promise<any> {
+  dismiss(role: string): Promise<any> {
     return this._viewCtrl.dismiss(this.getSelected(), role);
   }
 
diff --git a/src/components/select/select.ts b/src/components/select/select.ts
index 469a6e056a..3a306d985f 100644
--- a/src/components/select/select.ts
+++ b/src/components/select/select.ts
@@ -370,7 +370,7 @@ export class Select extends BaseInput<any> implements OnDestroy {
 
     this._fireFocus();
 
-    overlay.onDidDismiss((value: any, role: string) => {
+    overlay.onDidDismiss(() => {
       this._fireBlur();
       this._overlay = undefined;
     });
@@ -381,7 +381,7 @@ export class Select extends BaseInput<any> implements OnDestroy {
   /**
    * Close the select interface.
    */
-  close() {
+  close(): Promise<any> {
     if (!this._overlay || !this.isFocus()) {
       return;
     }
diff --git a/src/components/toast/toast-component.ts b/src/components/toast/toast-component.ts
index f03e688609..ad867a2955 100644
--- a/src/components/toast/toast-component.ts
+++ b/src/components/toast/toast-component.ts
@@ -96,7 +96,7 @@ export class ToastCmp implements AfterViewInit {
     }
   }
 
-  dismiss(role: any): Promise<any> {
+  dismiss(role: string): Promise<any> {
     clearTimeout(this.dismissTimeout);
     this.dismissTimeout = undefined;
     return this._viewCtrl.dismiss(null, role, {disableApp: false});
diff --git a/src/navigation/overlay-proxy.ts b/src/navigation/overlay-proxy.ts
index 61f7198996..1122305f97 100644
--- a/src/navigation/overlay-proxy.ts
+++ b/src/navigation/overlay-proxy.ts
@@ -42,7 +42,7 @@ export class OverlayProxy {
     }
   }
 
-  dismiss(data?: any, role?: any, navOptions?: NavOptions): Promise<any> {
+  dismiss(data?: any, role?: string, navOptions?: NavOptions): Promise<any> {
     if (this.overlay) {
       return this.overlay.dismiss();
     }
diff --git a/src/navigation/overlay.ts b/src/navigation/overlay.ts
index 4c782516bf..8194389ae6 100644
--- a/src/navigation/overlay.ts
+++ b/src/navigation/overlay.ts
@@ -2,7 +2,7 @@ import { NavOptions } from './nav-util';
 
 export interface Overlay {
   present(opts?: NavOptions): Promise<any>;
-  dismiss(data?: any, role?: any, navOptions?: NavOptions): Promise<any>;
+  dismiss(data?: any, role?: string, navOptions?: NavOptions): Promise<any>;
   onDidDismiss(callback: Function): void;
   onWillDismiss(callback: Function): void;
 }
diff --git a/src/navigation/view-controller.ts b/src/navigation/view-controller.ts
index 7e1775b4e5..caa1909fca 100644
--- a/src/navigation/view-controller.ts
+++ b/src/navigation/view-controller.ts
@@ -167,7 +167,7 @@ export class ViewController {
    * @param {NavOptions} NavOptions Options for the dismiss navigation.
    * @returns {any} data Returns the data passed in, if any.
    */
-  dismiss(data?: any, role?: any, navOptions: NavOptions = {}): Promise<any> {
+  dismiss(data?: any, role?: string, navOptions: NavOptions = {}): Promise<any> {
     if (!this._nav) {
       assert(this._state === STATE_DESTROYED, 'ViewController does not have a valid _nav');
       return Promise.resolve(false);
diff --git a/src/util/mock-providers.ts b/src/util/mock-providers.ts
index 62320cde56..75357c5f75 100644
--- a/src/util/mock-providers.ts
+++ b/src/util/mock-providers.ts
@@ -591,7 +591,7 @@ export function mockNgModuleLoader(): NgModuleLoader {
 export function mockOverlay() {
   return {
     present: (opts?: NavOptions) => { return Promise.resolve(); },
-    dismiss: (data?: any, role?: any, navOptions?: NavOptions) => { return Promise.resolve(); },
+    dismiss: (data?: any, role?: string, navOptions?: NavOptions) => { return Promise.resolve(); },
     onDidDismiss: (callback: Function) => { },
     onWillDismiss: (callback: Function) => { }
   };