Add is.domElement()

index.js

@@ -161,4 +161,6 @@ is.inRange = (x, range) => {
 	throw new TypeError(`Invalid range: ${util.inspect(range)}`);
 };
 
+is.domElement = x => is.object(x) && x.nodeType === 1;
+
 module.exports = is;

package.json

@@ -44,6 +44,7 @@
   ],
   "devDependencies": {
     "ava": "*",
+    "jsdom": "^11.3.0",
     "xo": "*"
   }
 }

readme.md

@@ -145,6 +145,10 @@ Check if `value` (number) is in the range of `0` to `upperBound`.
 is.inRange(3, 10);
 ```
 
+##### .domElement(value)
+
+Returns `true` if `value` is a domElement.
+
 
 ## FAQ
 

test.js

@@ -1,5 +1,6 @@
 import util from 'util';
 import test from 'ava';
+import {JSDOM} from 'jsdom';
 import m from '.';
 
 const isNode8orHigher = Number(process.versions.node.split('.')[0]) >= 8;
@@ -358,3 +359,17 @@ test('is.inRange', t => {
 		m.inRange(0, [1, 2, 3]);
 	});
 });
+
+test('is.domElement', t => {
+	const {document} = (new JSDOM(`...`)).window;
+	t.true(m.domElement(document.createElement('div')));
+	t.false(m.domElement('hello world'));
+	t.false(m.domElement([]));
+	t.false(m.domElement(new Map()));
+	t.false(m.domElement(null));
+	t.false(m.domElement(undefined));
+	t.false(m.domElement(0));
+	t.false(m.domElement(NaN));
+	t.false(m.domElement(Infinity));
+	t.false(m.domElement({}));
+});