inlining react-fast-compare to get around rollup configuration issues

package.json

@@ -16,7 +16,6 @@
     "memoize-one": "^4.0.0",
     "prop-types": "^15.6.0",
     "raf": "^3.4.0",
-    "react-fast-compare": "^2.0.1",
     "react-input-autosize": "^2.2.1",
     "react-transition-group": "^2.2.1"
   },

src/Select.js

@@ -3,7 +3,7 @@
 import React, { Component, type ElementRef, type Node } from 'react';
 
 import memoizeOne from 'memoize-one';
-import isEqual from 'react-fast-compare';
+import isEqual from './internal/react-fast-compare';
 
 import { createFilter } from './filters';
 import {

src/animated/index.js

@@ -1,6 +1,6 @@
 // @flow
 import memoize from 'memoize-one';
-import isEqual from 'react-fast-compare';
+import isEqual from '../internal/react-fast-compare';
 import { type SelectComponents, defaultComponents } from '../components/index';
 import { default as AnimatedInput } from './Input';
 import { default as AnimatedMultiValue } from './MultiValue';

src/internal/react-fast-compare.js

@@ -0,0 +1,90 @@
+'use strict';
+
+var isArray = Array.isArray;
+var keyList = Object.keys;
+var hasProp = Object.prototype.hasOwnProperty;
+
+function equal(a, b) {
+  // fast-deep-equal index.js 2.0.1
+  if (a === b) return true;
+
+  if (a && b && typeof a == 'object' && typeof b == 'object') {
+    var arrA = isArray(a)
+      , arrB = isArray(b)
+      , i
+      , length
+      , key;
+
+    if (arrA && arrB) {
+      length = a.length;
+      if (length != b.length) return false;
+      for (i = length; i-- !== 0;) {
+        if (!equal(a[i], b[i])) return false;
+      }
+      return true;
+    }
+
+    if (arrA != arrB) return false;
+
+    var dateA = a instanceof Date
+      , dateB = b instanceof Date;
+    if (dateA != dateB) return false;
+    if (dateA && dateB) return a.getTime() == b.getTime();
+
+    var regexpA = a instanceof RegExp
+      , regexpB = b instanceof RegExp;
+    if (regexpA != regexpB) return false;
+    if (regexpA && regexpB) return a.toString() == b.toString();
+
+    var keys = keyList(a);
+    length = keys.length;
+
+    if (length !== keyList(b).length) {
+      return false;
+    }
+
+    for (i = length; i-- !== 0;) {
+      if (!hasProp.call(b, keys[i])) return false;
+    }
+    // end fast-deep-equal
+
+    // Custom handling for React
+    for (i = length; i-- !== 0;) {
+      key = keys[i];
+      if (key === '_owner' && a.$$typeof) {
+        // React-specific: avoid traversing React elements' _owner.
+        //  _owner contains circular references
+        // and is not needed when comparing the actual elements (and not their owners)
+        // .$$typeof and ._store on just reasonable markers of a react element
+        continue;
+      } else {
+        // all other properties should be traversed as usual
+        if (!equal(a[key], b[key])) return false;
+      }
+    }
+
+    // fast-deep-equal index.js 2.0.1
+    return true;
+  }
+
+  return a!==a && b!==b;
+}
+// end fast-deep-equal
+
+export default function exportedEqual(a, b) {
+  try {
+    return equal(a, b);
+  } catch (error) {
+    if (error.message && error.message.match(/stack|recursion/i)) {
+      // warn on circular references, don't crash
+      // browsers give this different errors name and messages:
+      // chrome/safari: "RangeError", "Maximum call stack size exceeded"
+      // firefox: "InternalError", too much recursion"
+      // edge: "Error", "Out of stack space"
+      console.warn('Warning: react-fast-compare does not handle circular references.', error.name, error.message);
+      return false;
+    }
+    // some other error. we should definitely know about these
+    throw error;
+  }
+};