# Initialization

Here is the instructions on how to initialize the Wepin Widget Javascript SDK.

## init

It initializes the Wepin SDK. Defines the attributes needed for the widget during initialization.

```javascript
await wepinSdk.init(attributes?)
```

### **Parameters**

* `attributes` \<object> **optional** &#x20;
* `type` \<string>\
  It determines how to display the app widget window on the first load. The default value is `hide`. Currently, only `hide` is supported.\
  `hide` hides the widget window on the first load. The widget window can be displayed later using `openWindow()`.
* `defaultLanguage`: \<string>\
  It sets the default language of the widget. The default value is `ko`. Currently, supported languages are `en` , `ko` and `ja`.
* `defaultCurrency`**:** \<string>\
  It sets the default currency of the widget. The default value is `KRW`. Currently, supported currencies are `USD`,  `KRW` and  `JPY`
* `loginProviders`: \<string\[]> **optional**  \
  It's the list of login providers. Currently, supported providers are `google`, `apple`, `naver`, and `discord`. Define only the necessary login providers.
  * If this value is not specified, all provided providers can be used.
  * If an empty array is provided, only email login is available. (Supported from version v0.0.3)

### **Return value**

* `Promise`\<void>

### Example

<pre class="language-javascript"><code class="lang-javascript">await wepinSdk.init({
    type: 'hide',
    defaultLanguage: 'ko',
    defaultCurrency: 'KRW',
})

// google, apple login
<strong>await wepinSdk.init({
</strong>    type: 'hide',
    defaultLanguage: 'ko',
    defaultCurrency: 'KRW',
    loginProviders: ['google', 'apple']
})

// only email login
await wepinSdk.init({
    type: 'hide',
    defaultLanguage: 'ko',
    defaultCurrency: 'KRW',
    loginProviders: []
})
</code></pre>

## isInitialized

It checks if WepinSDK is initialized properly.

```javascript
wepinSdk.isInitialized()
```

### **Parameters**

* \<void>

### **Return Value**

* `<boolean>`\
  It returns <mark style="color:orange;">`true`</mark> if init was successful, otherwise returns <mark style="color:orange;">`false`</mark>.

### **Example**

```javascript
await wepinSdk.init({
    type: 'hide',
    defaultLanguage: 'ko',
    defaultCurrency: 'KRW',
})

if(wepinSdk.isInitialized()) {
  console.log('wepinSDK is initialized!')
}
```

## changeLanguage

It allows changing the language and currency of the widget.

```javascript
wepinSdk.changeLanguage({language, currency})
```

### **Parameters**

* `language` \<string>\
  It specifies the language to be displayed in the widget. Currently, supported languages are `en`, `ko` and `ja`.
* `currency` \<string>\
  It specifies the currency to be displayed in the widget. Currently, supported currencies are `USD` , `KRW` and `JPY`

### Example

```javascript
wepinSdk.changeLanguage({
   currency: 'KRW',
   language: 'ko'
})
```