improve record method and bump 0.2.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rrweb",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "record and replay the web",
   "main": "index.js",
   "scripts": {

src/record/index.ts

@@ -16,13 +16,13 @@ function wrapEvent(e: event): eventWithTime {
   };
 }
 
-function record(options: recordOptions) {
-  try {
+function record(options: recordOptions = {}) {
   const { emit } = options;
   // runtime checks for user options
   if (!emit) {
     throw new Error('emit function is required');
   }
+  try {
     on('DOMContentLoaded', () => {
       emit(
         wrapEvent({
@@ -33,7 +33,9 @@ function record(options: recordOptions) {
         }),
       );
     });
-    on('load', () => {
+    on(
+      'load',
+      () => {
         emit(wrapEvent({ type: EventType.Load, data: {} }));
         const [node, idNodeMap] = snapshot(document);
         if (!node) {
@@ -103,9 +105,12 @@ function record(options: recordOptions) {
               }),
             ),
         });
-    });
+      },
+      window,
+    );
   } catch (error) {
     // TODO: handle internal error
+    console.warn(error);
   }
 }
 

src/types.ts

@@ -85,7 +85,7 @@ export type eventWithTime = event & {
 };
 
 export type recordOptions = {
-  emit: (e: eventWithTime) => void;
+  emit?: (e: eventWithTime) => void;
 };
 
 export type observerParam = {