chore: update readme (#325)

README.md

@@ -20,13 +20,18 @@ $ yarn bootstrap
 ```
 the project will install all dependencies and run `lerna bootstrap` to initialize the project
 
-## Storybook preview
+## Website preview
 With command
 ```bash
-$ yarn storybook
+$ yarn website-dev
 ```
-the project will launch `@storybook` client for you to preview all existing component
+the project will launch website for you to preview all existing component
 
+You can also use this command to start a blank page to debug
+```bash
+$ yarn website-dev:play
+//source file: ./website/play/index.vue
+```
 ## Component migration process
 1. Convert the item in https://github.com/element-plus/element-plus/projects/1 to an issue
 2. Assign yourself to the issue

package.json

@@ -14,7 +14,7 @@
     "lint": "eslint ./packages --ext .vue,.js,.ts",
     "website-build": "webpack --config ./website/webpack.config.js",
     "website-dev": "webpack-dev-server --config ./website/webpack.config.js",
-    "website-dev:play": "PLAY_ENV=true yarn website-dev"
+    "website-dev:play": "cross-env PLAY_ENV=true yarn website-dev"
   },
   "peerDependencies": {
     "vue": "^3.0.0-rc.9"

packages/locale/index.ts

@@ -10,7 +10,7 @@ function template(str: string, option) {
   })
 }
 
-export const t = (path:string, option): string => {
+export const t = (path:string, option?): string => {
   let value
   const array = path.split('.')
   let current = lang