refactor(package): replace lodash.hasin

Replace module lodash.hasin (4 KB) with private
function objectHasPropertyName (500 B)

#97

lib/type-inspector/helpers/is-type-of.js

@@ -1,8 +1,8 @@
-const hasIn = require('lodash.hasin')
+const objectHasPropertyName = require('./object-has-property-name')
 const typeMap = require('./type-map')
 
 const isTypeOf = (value, type) => {
-  if (hasIn(value, 'type')) {
+  if (objectHasPropertyName(value)) {
     return value.type === type
   }
   return typeMap.get(type)(value)

lib/type-inspector/helpers/is-type.js

@@ -1,8 +1,8 @@
 const get = require('lodash.get')
-const hasIn = require('lodash.hasin')
+const objectHasPropertyName = require('./object-has-property-name')
 const types = require('./types.json')
 
-const isType = (object, type) =>
-  hasIn(object, 'type') && object.type === get(types, type)
+const isType = (instance, type) =>
+  objectHasPropertyName(instance) && instance.type === get(types, type)
 
 module.exports = isType

lib/type-inspector/helpers/is-value-type-of.js

@@ -1,11 +1,11 @@
-const hasIn = require('lodash.hasin')
+const objectHasPropertyName = require('./object-has-property-name')
 const typeMap = require('./type-map')
 
-const isValueTypeOf = (value, type) => {
-  if (hasIn(value, 'value')) {
-    return typeMap.get(type)(value.value)
+const isValueTypeOf = (instance, type) => {
+  if (objectHasPropertyName(instance, 'value')) {
+    return typeMap.get(type)(instance.value)
   }
-  return typeMap.get(type)(value)
+  return typeMap.get(type)(instance)
 }
 
 module.exports = isValueTypeOf

lib/type-inspector/helpers/object-has-property-name.js

@@ -0,0 +1,21 @@
+const {
+  isValid,
+  object
+} = require('ow')
+
+/**
+ * Determine whether a value is an object with a given property.
+ *
+ * @private
+ * @param {*} instance - An ECMAScript variable.
+ * @param {string} [propertyName='type'] - The name of the property
+ * being searched for.
+ * @returns {boolean} - `true` if the property exists; otherwise, `false`.
+ */
+
+const objectHasPropertyName = (instance, propertyName = 'type') => {
+  return isValid(instance, object) &&
+    Object.getOwnPropertyNames(instance).includes(propertyName)
+}
+
+module.exports = objectHasPropertyName

lib/type-inspector/helpers/type-of.js

@@ -1,8 +1,8 @@
-const hasIn = require('lodash.hasin')
 const is = require('@sindresorhus/is')
+const objectHasPropertyName = require('./object-has-property-name')
 
 const typeOf = (value) => {
-  if (hasIn(value, 'type')) {
+  if (objectHasPropertyName(value)) {
     return value.type
   }
   return is(value)

lib/type-inspector/helpers/value-type-of.js

@@ -1,11 +1,11 @@
-const hasIn = require('lodash.hasin')
 const is = require('@sindresorhus/is')
+const objectHasPropertyName = require('./object-has-property-name')
 
-const valueTypeOf = (value) => {
-  if (hasIn(value, 'value')) {
-    return is(value.value)
+const valueTypeOf = (instance) => {
+  if (objectHasPropertyName(instance, 'value')) {
+    return is(instance.value)
   }
-  return is(value)
+  return is(instance)
 }
 
 module.exports = valueTypeOf