lib: use kEmptyObject in various places

Author: LiviaMedeiros

lib/internal/blob.js

@@ -44,6 +44,7 @@ const {
 const {
   createDeferredPromise,
   customInspectSymbol: kInspect,
+  kEmptyObject,
 } = require('internal/util');
 const { inspect } = require('internal/util/inspect');
 
@@ -134,7 +135,7 @@ class Blob {
    * }} [options]
    * @constructs {Blob}
    */
-  constructor(sources = [], options = {}) {
+  constructor(sources = [], options = kEmptyObject) {
     if (sources === null ||
         typeof sources[SymbolIterator] !== 'function' ||
         typeof sources === 'string') {

lib/internal/encoding.js

@@ -31,6 +31,7 @@ const kEncoder = Symbol('encoder');
 const {
   getConstructorOf,
   customInspectSymbol: inspect,
+  kEmptyObject,
   kEnumerableProperty,
 } = require('internal/util');
 
@@ -377,7 +378,7 @@ function makeTextDecoderICU() {
   } = internalBinding('icu');
 
   class TextDecoder {
-    constructor(encoding = 'utf-8', options = {}) {
+    constructor(encoding = 'utf-8', options = kEmptyObject) {
       encoding = `${encoding}`;
       validateObject(options, 'options', {
         nullable: true,
@@ -406,7 +407,7 @@ function makeTextDecoderICU() {
     }
 
 
-    decode(input = empty, options = {}) {
+    decode(input = empty, options = kEmptyObject) {
       validateDecoder(this);
       if (isAnyArrayBuffer(input)) {
         input = lazyBuffer().from(input);
@@ -451,7 +452,7 @@ function makeTextDecoderJS() {
   }
 
   class TextDecoder {
-    constructor(encoding = 'utf-8', options = {}) {
+    constructor(encoding = 'utf-8', options = kEmptyObject) {
       encoding = `${encoding}`;
       validateObject(options, 'options', {
         nullable: true,
@@ -479,7 +480,7 @@ function makeTextDecoderJS() {
       this[kBOMSeen] = false;
     }
 
-    decode(input = empty, options = {}) {
+    decode(input = empty, options = kEmptyObject) {
       validateDecoder(this);
       if (isAnyArrayBuffer(input)) {
         input = lazyBuffer().from(input);

lib/internal/histogram.js

@@ -17,6 +17,7 @@ const {
 
 const {
   customInspectSymbol: kInspect,
+  kEmptyObject,
 } = require('internal/util');
 
 const { inspect } = require('util');
@@ -352,7 +353,7 @@ internalRecordableHistogram.prototype[kDeserialize] = () => {};
  * }} [options]
  * @returns {RecordableHistogram}
  */
-function createHistogram(options = {}) {
+function createHistogram(options = kEmptyObject) {
   validateObject(options, 'options');
   const {
     lowest = 1,

lib/internal/promise_hooks.js

@@ -11,6 +11,7 @@ const {
 const { setPromiseHooks } = internalBinding('async_wrap');
 const { triggerUncaughtException } = internalBinding('errors');
 
+const { kEmptyObject } = require('internal/util');
 const { validatePlainFunction } = require('internal/validators');
 
 const hooks = {
@@ -101,7 +102,7 @@ const onBefore = makeUseHook('before');
 const onAfter = makeUseHook('after');
 const onSettled = makeUseHook('settled');
 
-function createHook({ init, before, after, settled } = {}) {
+function createHook({ init, before, after, settled } = kEmptyObject) {
   const hooks = [];
 
   if (init) ArrayPrototypePush(hooks, onInit(init));