Add .isWeakRef()

package.json

@@ -56,11 +56,11 @@
 		"ava": "^3.3.0",
 		"del-cli": "^2.0.0",
 		"eslint-config-xo-typescript": "^0.26.0",
-		"jsdom": "^16.0.1",
+		"jsdom": "^19.0.0",
 		"rxjs": "^6.4.0",
 		"tempy": "^0.4.0",
 		"ts-node": "^8.3.0",
-		"typescript": "~3.8.2",
+		"typescript": "^4.6.2",
 		"xo": "^0.26.1",
 		"zen-observable": "^0.8.8"
 	},

readme.md

@@ -198,6 +198,7 @@ is.boundFunction(function () {});
 ##### .set(value)
 ##### .weakMap(value)
 ##### .weakSet(value)
+##### .weakRef(value)
 
 #### Typed arrays
 

source/index.ts

@@ -43,6 +43,7 @@ const objectTypeNames = [
 	'Set',
 	'WeakMap',
 	'WeakSet',
+	'WeakRef',
 	'ArrayBuffer',
 	'SharedArrayBuffer',
 	'DataView',
@@ -216,6 +217,7 @@ is.map = <Key = unknown, Value = unknown>(value: unknown): value is Map<Key, Val
 is.set = <T = unknown>(value: unknown): value is Set<T> => isObjectOfType<Set<T>>('Set')(value);
 is.weakMap = <Key extends object = object, Value = unknown>(value: unknown): value is WeakMap<Key, Value> => isObjectOfType<WeakMap<Key, Value>>('WeakMap')(value);
 is.weakSet = (value: unknown): value is WeakSet<object> => isObjectOfType<WeakSet<object>>('WeakSet')(value);
+is.weakRef = (value: unknown): value is WeakRef<object> => isObjectOfType<WeakRef<object>>('WeakRef')(value);
 
 is.int8Array = isObjectOfType<Int8Array>('Int8Array');
 is.uint8Array = isObjectOfType<Uint8Array>('Uint8Array');
@@ -494,6 +496,7 @@ interface Assert {
 	set: <T = unknown>(value: unknown) => asserts value is Set<T>;
 	weakMap: <Key extends object = object, Value = unknown>(value: unknown) => asserts value is WeakMap<Key, Value>;
 	weakSet: <T extends object = object>(value: unknown) => asserts value is WeakSet<T>;
+	weakRef: <T extends object = object>(value: unknown) => asserts value is WeakRef<T>;
 	int8Array: (value: unknown) => asserts value is Int8Array;
 	uint8Array: (value: unknown) => asserts value is Uint8Array;
 	uint8ClampedArray: (value: unknown) => asserts value is Uint8ClampedArray;
@@ -597,6 +600,7 @@ export const assert: Assert = {
 	set: <T = unknown>(value: unknown): asserts value is Set<T> => assertType(is.set(value), 'Set', value),
 	weakMap: <Key extends object = object, Value = unknown>(value: unknown): asserts value is WeakMap<Key, Value> => assertType(is.weakMap(value), 'WeakMap', value),
 	weakSet: <T extends object = object>(value: unknown): asserts value is WeakSet<T> => assertType(is.weakSet(value), 'WeakSet', value),
+	weakRef: <T extends object = object>(value: unknown): asserts value is WeakRef<T> => assertType(is.weakRef(value), 'WeakRef', value),
 	int8Array: (value: unknown): asserts value is Int8Array => assertType(is.int8Array(value), 'Int8Array', value),
 	uint8Array: (value: unknown): asserts value is Uint8Array => assertType(is.uint8Array(value), 'Uint8Array', value),
 	uint8ClampedArray: (value: unknown): asserts value is Uint8ClampedArray => assertType(is.uint8ClampedArray(value), 'Uint8ClampedArray', value),

test/test.ts

@@ -335,6 +335,14 @@ const types = new Map<string, Test>([
 		],
 		typename: 'WeakSet'
 	}],
+	['weakRef', {
+		is: is.weakRef,
+		assert: assert.weakRef,
+		fixtures: [
+			new window.WeakRef({})
+		],
+		typename: 'WeakRef'
+	}],
 	['weakMap', {
 		is: is.weakMap,
 		assert: assert.weakMap,
@@ -792,6 +800,10 @@ test('is.weakSet', t => {
 	testType(t, 'weakSet');
 });
 
+test('is.weakRef', t => {
+	testType(t, 'weakRef');
+});
+
 test('is.int8Array', t => {
 	testType(t, 'int8Array');
 });
@@ -1203,7 +1215,7 @@ test('is.arrayLike', t => {
 	t.false(is.arrayLike(new Map()));
 
 	(function () {
-		t.notThrows(() => {
+		t.notThrows(function () {
 			assert.arrayLike(arguments); // eslint-disable-line prefer-rest-params
 		});
 	})();

tsconfig.json

@@ -2,9 +2,10 @@
 	"extends": "@sindresorhus/tsconfig",
 	"compilerOptions": {
 		"outDir": "dist",
-		"target": "es2018",
+		"target": "ES2018",
 		"lib": [
-			"es2018",
+		  	"ES2018",
+			"ESNext",
 			"dom"
 		]
 	},