Remove dequal from the project

package.json

@@ -66,8 +66,5 @@
  "not dead",
  "not op_mini all",
  "ie 11"
- ],
- "dependencies": {
- "dequal": "^2.0.3"
- }
+ ]
 }

src/elementRoleMap.js

@@ -2,7 +2,6 @@
  * @flow
  */
 
-import { dequal } from 'dequal/lite';
 import iterationDecorator from "./util/iterationDecorator";
 import rolesMap from './rolesMap';
 
@@ -24,25 +23,7 @@ for (let i = 0; i < keys.length; i++) {
  if (relation.module === 'HTML') {
  const concept = relation.concept;
  if (concept) {
- const elementRoleRelation: ?ElementARIARoleRelationTuple = elementRoles.find(relation => dequal(relation, concept));
- let roles: RoleSet;
-
- if (elementRoleRelation) {
- roles = elementRoleRelation[1];
- } else {
- roles = [];
- }
- let isUnique = true;
- for (let i = 0; i < roles.length; i++) {
- if (roles[i] === key) {
- isUnique = false;
- break;
- }
- }
- if (isUnique) {
- roles.push(key);
- }
- elementRoles.push([concept, roles]);
+ elementRoles.push([concept, [key]]);
  }
  }
  }
@@ -67,7 +48,7 @@ const elementRoleMap: TAriaQueryMap<
  },
  get: function (key: ARIARoleRelationConcept): ?RoleSet {
  const item = elementRoles.find(tuple => (
- key.name === tuple[0].name && dequal(key.attributes, tuple[0].attributes)
+ key.name === tuple[0].name && ariaRoleRelationConceptAttributeEquals(key.attributes, tuple[0].attributes)
  ));
  return item && item[1];
  },
@@ -82,6 +63,54 @@ const elementRoleMap: TAriaQueryMap<
  },
 };
 
+function ariaRoleRelationConceptAttributeEquals(
+ a?: Array<ARIARoleRelationConceptAttribute>,
+ b?: Array<ARIARoleRelationConceptAttribute>,
+): boolean {
+
+ if (a === undefined && b !== undefined) {
+ return false;
+ }
+
+ if (a !== undefined && b === undefined) {
+ return false;
+ }
+
+ if (a !== undefined && b !== undefined) {
+ if (a.length !== b.length) {
+ return false;
+ }
+
+ for (let i = 0; i < a.length; i++) {
+ if (a[i].name !== b[i].name || a[i].value !== b[i].value) {
+ return false;
+ }
+
+ if (a[i].constraints === undefined && b[i].constraints !== undefined) {
+ return false;
+ }
+
+ if (a[i].constraints !== undefined && b[i].constraints === undefined) {
+ return false
+ }
+
+ if (a[i].constraints !== undefined && b[i].constraints !== undefined) {
+ if (a[i].constraints.length !== b[i].constraints.length) {
+ return false;
+ }
+
+ for (let j = 0; j < a[i].constraints.length; j++) {
+ if (a[i].constraints[j] !== b[i].constraints[j]) {
+ return false;
+ }
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
 export default (
  iterationDecorator(
  elementRoleMap,