1491 custom log levels can be silent

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           - 18
           - 20
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}

README.md

@@ -675,10 +675,21 @@ To colorize the standard logging level add
 ```js
 winston.format.combine(
   winston.format.colorize(),
-  winston.format.json()
+  winston.format.simple()
+);
+```
+where `winston.format.simple()` is whatever other formatter you want to use.  The `colorize` formatter must come before any formatters adding text you wish to color.
+
+### Colorizing full log line when json formatting logs
+
+To colorize the full log line with the json formatter you can apply the following
+
+```js
+winston.format.combine(
+  winston.format.json(),
+  winston.format.colorize({ all })
 );
 ```
-where `winston.format.json()` is whatever other formatter you want to use.  The `colorize` formatter must come before any formatters adding text you wish to color.
 
 ## Transports
 

index.d.ts

@@ -139,13 +139,6 @@ declare namespace winston {
     input: LeveledLogMethod;
     silly: LeveledLogMethod;
 
-    // for syslog levels only
-    emerg: LeveledLogMethod;
-    alert: LeveledLogMethod;
-    crit: LeveledLogMethod;
-    warning: LeveledLogMethod;
-    notice: LeveledLogMethod;
-
     query(
       options?: QueryOptions,
       callback?: (err: Error, results: any) => void

lib/winston/logger.js

@@ -141,6 +141,17 @@ class Logger extends Transform {
       );
     }
 
+    if (!Object.keys(this.levels).includes(this.level)){
+      const message = [
+        '[winston] Log level <${this.level}> is not defined in levels definition.',
+        'Please double check the setup of your transports and/or custom log levels.',
+        'This transport will be set to silent.',
+        'See https://github.com/winstonjs/winston#logging-levels for more information.'
+      ]
+      console.warn(message.join('\n'));
+      this.silent = true;
+    }
+
     if (exceptionHandlers) {
       this.exceptions.handle(exceptionHandlers);
     }