[improvement] mixins typescript (#3690)

src/utils/create/bem.ts

@@ -47,3 +47,5 @@ export function createBEM(name: string) {
     return mods ? [el, prefix(el, mods)] : el;
   };
 }
+
+export type BEM = ReturnType<typeof createBEM>;

src/utils/create/i18n.ts

@@ -10,3 +10,5 @@ export function createI18N(name: string) {
     return typeof message === 'function' ? message(...args) : message;
   };
 }
+
+export type Translate = ReturnType<typeof createI18N>;

src/utils/create/index.ts

@@ -1,11 +1,11 @@
-import { createBEM } from './bem';
+import { createBEM, BEM } from './bem';
 import { createComponent } from './component';
-import { createI18N } from './i18n';
+import { createI18N, Translate } from './i18n';
 
 type CreateNamespaceReturn = [
   ReturnType<typeof createComponent>,
-  ReturnType<typeof createBEM>,
-  ReturnType<typeof createI18N>
+  BEM,
+  Translate
 ];
 
 export function createNamespace(name: string): CreateNamespaceReturn {

src/utils/dom/event.ts

@@ -2,7 +2,7 @@
 /* eslint-disable getter-return */
 /* eslint-disable import/no-mutable-exports */
 import { isServer } from '..';
-import { EventHanlder } from '../types';
+import { EventHandler } from '../types';
 
 export let supportsPassive = false;
 
@@ -20,9 +20,9 @@ if (!isServer) {
 }
 
 export function on(
-  target: HTMLElement,
+  target: HTMLElement | Document,
   event: string,
-  handler: EventHanlder,
+  handler: EventHandler,
   passive = false
 ) {
   if (!isServer) {
@@ -34,7 +34,11 @@ export function on(
   }
 }
 
-export function off(target: HTMLElement, event: string, handler: EventHanlder) {
+export function off(
+  target: HTMLElement | Document,
+  event: string,
+  handler: EventHandler
+) {
   if (!isServer) {
     target.removeEventListener(event, handler);
   }

src/utils/types.ts

@@ -1,7 +1,7 @@
 import { VNode, CreateElement, RenderContext } from 'vue';
 import { InjectOptions, PropsDefinition } from 'vue/types/options';
 
-export type EventHanlder = (eventName?: Event) => void;
+export type EventHandler = (event: Event) => void;
 
 export type ObjectIndex = {
   [key: string]: any;