use global define to touch context

js-framework/src/runtime/global.ts

@@ -0,0 +1,6 @@
+import { Context } from "./sandbox";
+
+declare global {
+    const context: Context
+}
+export { }

js-framework/src/runtime/sandbox.ts

@@ -77,6 +77,7 @@ export function jsCallReject(contextId: string, callbackId: string, args?: any)
 }
 
 export class Context {
+    holder: any
     id: string
     callbacks: Map<string, { resolve: Function, reject: Function }> = new Map
     constructor(id: string) {
@@ -93,6 +94,9 @@ export class Context {
             })
         })
     }
+    registor(instance: Object) {
+        this.holder = instance
+    }
 }