Refactor: refactor jsbridge lib makes it easily use

src/lib/jsBridge.ts

@@ -15,7 +15,7 @@
 /**
  * declare javascript bridge API
  */
-export interface JsBridge {
+export interface JsBridgeAPI {
 
     /**
      * Register a javascript bridge event handle
@@ -41,7 +41,7 @@ declare global {
         /**
          * Global jsbridge instance
          */
-        WebViewJavascriptBridge?: JsBridge | null
+        WebViewJavascriptBridge?: JsBridgeAPI | null
 
         /**
          * Global jsbridge init callback
@@ -52,12 +52,44 @@ declare global {
 
 }
 
+/**
+ * Check if perched in ClashX Runtime
+ */
+export function isClashX () {
+    return navigator.userAgent === 'ClashX Runtime'
+}
+
+/**
+ * Closure save jsbridge instance
+ */
+export let jsBridge: JsBridge = null
+
+/**
+ * JsBridge class
+ */
+export class JsBridge {
+
+    instance: JsBridgeAPI = null
+
+    constructor (callback = jsbridge => {}) {
+        if (window.WebViewJavascriptBridge) {
+            this.instance = window.WebViewJavascriptBridge
+            callback(this.instance)
+        }
+
+        // init jsbridge
+        this.initBridge(jsBridge => {
+            this.instance = jsBridge
+            callback(jsBridge)
+        })
+    }
+
     /**
      * setup a jsbridge before app render
      * @param {Function} cb callback when jsbridge initialized
      * @see https://github.com/marcuswestin/WebViewJavascriptBridge
      */
-export function setupJsBridge (callback = jsBridge => {}) {
+    private initBridge (callback) {
         /**
          * You need check if inClashX first
          */
@@ -82,10 +114,12 @@ export function setupJsBridge (callback = jsBridge => {}) {
         document.documentElement.appendChild(WVJBIframe)
         setTimeout(() => document.documentElement.removeChild(WVJBIframe), 0)
     }
-
-/**
- * Check if perched in ClashX Runtime
- */
-export function isClashX () {
-    return navigator.userAgent === 'ClashX Runtime'
+}
+
+export function setupJsBridge (callback) {
+    if (jsBridge) {
+        return callback(jsBridge)
+    }
+
+    jsBridge = new JsBridge(callback)
 }