make ConsoleLogger compatible with node < 8

slackapi · Feb 16, 2019 · 0bff647 · 0bff647
1 parent 6d54f96
commit 0bff647
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/src/logger.ts b/src/logger.ts
@@ -83,9 +83,19 @@ export class ConsoleLogger implements Logger {
     [LogLevel.DEBUG]: 100,
   };
 
+  /** Reference to a function that can be used as console.debug() */
+  private debugFn: (message?: any, ...optionalParams: any[]) => void;
+
   constructor() {
     this.level = LogLevel.INFO;
     this.name = '';
+
+    // In node < 8.0.0, console.debug does not exist
+    if (console.debug !== undefined) {
+      this.debugFn = console.debug;
+    } else {
+      this.debugFn = console.log;
+    }
   }
 
   /**
@@ -107,7 +117,7 @@ export class ConsoleLogger implements Logger {
    */
   public debug(...msg: any[]): void {
     if (ConsoleLogger.isMoreOrEqualSevere(LogLevel.DEBUG, this.level)) {
-      console.debug(ConsoleLogger.labels.get(LogLevel.DEBUG), this.name, ...msg);
+      this.debugFn(ConsoleLogger.labels.get(LogLevel.DEBUG), this.name, ...msg);
     }
   }
   /**