mappings

lib/levels.js

@@ -114,17 +114,28 @@ function isLevelEnabled (logLevel) {
   return logLevelVal && (logLevelVal >= this[levelValSym])
 }
 
+function mappings () {
+  const labels = Object.assign(
+    Object.create(Object.prototype, {Infinity: {value: 'silent'}}),
+    nums
+  )
+  const values = Object.assign(
+    Object.create(Object.prototype, {silent: {value: Infinity}}),
+    levels
+  )
+  return { labels, values }
+}
+
 module.exports = {
   isStandardLevelVal,
   isStandardLevel,
   lsCache,
-  levels,
-  nums,
   levelMethods,
   getLevelVal,
   setLevelVal,
   getLevel,
   setLevel,
   addLevel,
-  isLevelEnabled
+  isLevelEnabled,
+  mappings
 }

lib/tools.js

@@ -52,18 +52,6 @@ function asMetaWrapper (pretty, dest) {
   }
 }
 
-function defineLevelsProperty (onObject, levels) {
-  Object.defineProperty(onObject, 'levels', {
-    value: {
-      values: copy({}, levels.levels),
-      labels: copy({}, levels.nums)
-    },
-    enumerable: true
-  })
-  Object.defineProperty(onObject.levels.values, 'silent', {value: Infinity})
-  Object.defineProperty(onObject.levels.labels, Infinity, {value: 'silent'})
-}
-
 function countInterp (s, i) {
   var n = 0
   var pos = 0
@@ -212,7 +200,6 @@ function asChindings (instance, bindings) {
 
 module.exports = {
   copy,
-  defineLevelsProperty,
   noop,
   getPrettyStream,
   asChindings,

pino.js

@@ -22,19 +22,17 @@ const {
   isStandardLevelVal,
   isStandardLevel,
   lsCache,
-  levels,
-  nums,
   levelMethods,
   setLevelVal,
   getLevelVal,
   getLevel,
   setLevel,
   addLevel,
+  mappings,
   isLevelEnabled
 } = require('./lib/levels')
 const {
   copy,
-  defineLevelsProperty,
   noop,
   getPrettyStream,
   asChindings,
@@ -91,11 +89,9 @@ Object.assign(prototype, levelMethods)
 
 module.exports = pino
 
-defineLevelsProperty(pino, {levels, nums})
-
 pino.extreme = (dest = process.stdout.fd) => new SonicBoom(dest, 4096)
 pino.destination = (dest = process.stdout.fd) => new SonicBoom(dest)
-
+pino.levels = mappings()
 pino.stdSerializers = Object.assign({}, serializers)
 pino.stdTimeFunctions = Object.assign({}, timeFmt)
 
@@ -106,7 +102,6 @@ function pino (opts, stream) {
   const { base, name, serializers, chindings, level, levelVal } = state
 
   Object.setPrototypeOf(core, prototype)
-  defineLevelsProperty(core, {levels, nums})
   events(core)
   configure(core, {serializers, chindings, level, levelVal})
 
@@ -224,7 +219,9 @@ function create (opts, stream) {
   const time = (timestamp && timestamp instanceof Function)
     ? timestamp
     : (timestamp ? epochTime : nullTime)
+  const levels = mappings()
   const core = {
+    levels,
     time,
     stream,
     stringify,