2 files changed, 13 insertions, 8 deletions
diff --git a/js/src/util/event.ts b/js/src/util/event.ts
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/util/event.ts
diff --git a/js/src/util/log.ts b/js/src/util/log.ts
index 9de4eb495..8f7157140 100644
--- a/js/src/util/log.ts
+++ b/js/src/util/log.ts
@@ -2,16 +2,21 @@ export namespace Log {
   export function create(tags?: Record<string, any>) {
     tags = tags || {};
 
+    function build(message: any, extra?: Record<string, any>) {
+      const prefix = Object.entries({
+        ...tags,
+        ...extra,
+      })
+        .map(([key, value]) => `${key}=${value}`)
+        .join(" ");
+      return [prefix, message];
+    }
     const result = {
       info(message?: any, extra?: Record<string, any>) {
-        const prefix = Object.entries({
-          ...tags,
-          ...extra,
-        })
-          .map(([key, value]) => `${key}=${value}`)
-          .join(" ");
-        console.log(prefix, message);
-        return result;
+        console.log(...build(message, extra));
+      },
+      error(message?: any, extra?: Record<string, any>) {
+        console.error(...build(message, extra));
       },
       tag(key: string, value: string) {
         if (tags) tags[key] = value;