fix dropdown issue, add autoprefix for scss

lib/ui/dropdown.d.ts

@@ -1,15 +1,21 @@
+interface DropdownItem {
+    value: string;
+    text: string;
+    html?: HTMLElement
+}
+
 interface DropdownOptions {
     textkey?: string;
     valuekey?: string;
     htmlkey?: string;
     maxlength?: Number;
     multiselect?: boolean;
-    selected?: any;
-    selectedlist?: any[];
+    selected?: DropdownItem | any;
+    selectedlist?: Array<DropdownItem | any>;
     disabled?: boolean;
     input?: boolean;
     search?: boolean;
-    searchkeys?: string[];
+    searchkeys?: Array<string>;
     searchplaceholder?: string;
     tabindex?: Number;
     slidefixed?: boolean;
@@ -17,16 +23,28 @@ interface DropdownOptions {
 }
 
 interface Dropdown {
+    sourceFilter: () => Array<DropdownItem | any>;
+    onselectedlist: (list: Array<DropdownItem | any>) => void;
+    onselected: (item: DropdownItem | any) => void;
+    onexpanded: () => void;
+
     create(): HTMLElement;
+    readonly multiselect: boolean;
     get disabled(): boolean;
     set disabled(flag: boolean);
-    readonly multiselect: boolean;
-    readonly selected: any;
+    get source(): Array<DropdownItem | any>;
+    set source(list: Array<DropdownItem | any>): void;
+    readonly selected: DropdownItem | any;
+    readonly selectedlist: Array<DropdownItem | any>;
+    select(selected: DropdownItem | any, init?: boolean): void;
+    selectlist(selectedlist: Array<DropdownItem | any>, init?: boolean): void;
 }
 
 declare var Dropdown: {
     prototype: Dropdown;
-    new(options: DropdownOptions): Dropdown;
-};
+    new(options?: DropdownOptions): Dropdown;
+
+    resolve(dom?: HTMLElement): HTMLElement;
+}
 
 export default Dropdown;