Inline type-detect as a simple function

README.md

@@ -145,7 +145,6 @@ Chai offers a robust Plugin architecture for extending Chai's assertions and int
 - [chaijs / chai-docs](https://github.com/chaijs/chai-docs): The chaijs.com website source code.
 - [chaijs / assertion-error](https://github.com/chaijs/assertion-error): Custom `Error` constructor thrown upon an assertion failing.
 - [chaijs / deep-eql](https://github.com/chaijs/deep-eql): Improved deep equality testing for Node.js and the browser.
-- [chaijs / type-detect](https://github.com/chaijs/type-detect): Improved typeof detection for Node.js and the browser.
 - [chaijs / check-error](https://github.com/chaijs/check-error): Error comparison and information related utility for Node.js and the browser.
 - [chaijs / loupe](https://github.com/chaijs/loupe): Inspect utility for Node.js and browsers.
 - [chaijs / pathval](https://github.com/chaijs/pathval): Object value retrieval given a string path.

lib/chai/core/assertions.js

@@ -243,8 +243,8 @@ Assertion.addProperty('all', function () {
  * ### .a(type[, msg])
  *
  * Asserts that the target's type is equal to the given string `type`. Types
- * are case insensitive. See the `type-detect` project page for info on the
- * type detection algorithm: https://github.com/chaijs/type-detect.
+ * are case insensitive. See the utility file `./type-detect.js` for info on the
+ * type detection algorithm.
  *
  *     expect('foo').to.be.a('string');
  *     expect({a: 1}).to.be.an('object');

lib/chai/utils/expectTypes.js

@@ -20,7 +20,7 @@
 
 import AssertionError from 'assertion-error';
 import {flag} from './flag.js';
-import {default as type} from 'type-detect';
+import {type} from './type-detect.js';
 
 export function expectTypes(obj, types) {
   var flagMsg = flag(obj, 'message');

lib/chai/utils/getOperator.js

@@ -1,6 +1,5 @@
 import {flag} from './flag.js';
-import type from 'type-detect';
-
+import {type} from './type-detect.js';
 
 function isObjectType(obj) {
   var objectType = type(obj);

lib/chai/utils/index.js

@@ -20,7 +20,7 @@ export {test} from './test.js';
  * type utility
  */
 
-export {default as type} from 'type-detect';
+export {type} from './type-detect.js';
 
 /*!
  * expectTypes utility

lib/chai/utils/type-detect.js

@@ -0,0 +1,18 @@
+const typesToLowerCase = [
+  "Number",
+  "String",
+  "Boolean",
+  "Null",
+  "Undefined",
+  "Function",
+  "Symbol",
+];
+
+export function type(obj) {
+  const type = Object.prototype.toString.call(obj).slice(8, -1);
+
+  if (typesToLowerCase.includes(type)) {
+    return type.toLowerCase();
+  }
+  return type;
+}

package.json

@@ -47,8 +47,7 @@
     "check-error": "^2.0.0",
     "deep-eql": "^5.0.0",
     "loupe": "^2.3.1",
-    "pathval": "^2.0.0",
-    "type-detect": "^4.0.5"
+    "pathval": "^2.0.0"
   },
   "devDependencies": {
     "bump-cli": "^1.1.3",