Add verbose option

src/logger.ts

@@ -4,6 +4,7 @@ import {get_color} from './color'
 export const writers = new Map<string, Writer>
 export let options: Options = {
     format: "[$time] $level $namespace :",
+    verbose: true,
 }
 
 export class Logger {
@@ -41,7 +42,10 @@ export class Logger {
 }
 
 function log(message: any[], level: Level, namespace: string) : void {
-    if (writers.size === 0) return
+    if (writers.size === 0) {
+        if (options.verbose) console.log("No writer subscribed, discard message")
+        return
+    }
 
     // Format header of log
     const head = options.format
@@ -50,9 +54,12 @@ function log(message: any[], level: Level, namespace: string) : void {
     const head_bw = head.replace('$level', level_to_string(level, false))
     const head_color = head.replace("$level", level_to_string(level, true))
 
-    for (const writer of writers.values()) {
+    for (const [name, writer] of writers.entries()) {
         const options = writer.options
-        if (options?.minLevel > level) continue
+        if (options?.minLevel > level) {
+            if (options.verbose) console.log(`Writer's level is lower, discard message for ${name}`)
+            continue
+        }
         writer.log(level, options?.with_color ? head_color : head_bw, ...message)
     }
 }

src/types.ts

@@ -1,5 +1,6 @@
 export type Options = {
     format: string,
+    verbose: boolean,
 }
 
 export enum Level {