Make files mandatory in Backend.ts and pass empty map from controller

Author: Lustmored

src/LiveComponent/assets/src/Backend/Backend.ts

@@ -13,6 +13,7 @@ export interface BackendInterface {
         updated: {[key: string]: any},
         children: ChildrenFingerprints,
         updatedPropsFromParent: {[key: string]: any},
+        files: {[key: string]: FileList},
     ): BackendRequest;
 }
 
@@ -34,7 +35,7 @@ export default class implements BackendInterface {
         updated: {[key: string]: any},
         children: ChildrenFingerprints,
         updatedPropsFromParent: {[key: string]: any},
-        files: {[key: string]: FileList} = {},
+        files: {[key: string]: FileList},
     ): BackendRequest {
         const { url, fetchOptions } = this.requestBuilder.buildRequest(
             props,

src/LiveComponent/assets/src/Component/index.ts

@@ -358,6 +358,7 @@ export default class Component {
             this.valueStore.getDirtyProps(),
             this.getChildrenFingerprints(),
             this.valueStore.getUpdatedPropsFromParent(),
+            {}, // Uploaded files will go here
         );
         this.hooks.triggerHook('loading.state:started', this.element, this.backendRequest);