Add isBrowserTabFocused, fixed is tests

snippets/isBrowserTabFocused.md

@@ -0,0 +1,13 @@
+### isBrowserTabFocused
+
+Returns `true` if the browser tab of the page is focused, `false` otherwise.
+
+Use the `Document.hidden` property, introduced by the Page Visibility API to check if the browser tab of the page is visible or hidden.
+
+```js
+const isBrowserTabFocused = () => !document.hidden;
+```
+
+```js
+isBrowserTabFocused(); // true
+```

tag_database

@@ -121,6 +121,7 @@ isAnagram:string,regexp
 isArrayLike:type,array
 isBoolean:type
 isBrowser:utility,browser
+isBrowserTabFocused:browser
 isDivisible:math
 isEmpty:type,array,object,string
 isEven:math

test/is/is.test.js

@@ -14,11 +14,11 @@ test('Testing is', (t) => {
   t.true(is(Set, new Set()), `Works for sets`);
   t.true(is(WeakMap, new WeakMap()), `Works for weak maps`);
   t.true(is(WeakSet, new WeakSet()), `Works for weak sets`);
-  t.false(is(String, ''), `Works for strings - returns false for primitive`);
+  t.true(is(String, ''), `Works for strings - returns true for primitive`);
   t.true(is(String, new String('')), `Works for strings - returns true when using constructor`);
-  t.false(is(Number, 1), `Works for numbers - returns false for primitive`);
+  t.true(is(Number, 1), `Works for numbers - returns true for primitive`);
   t.true(is(Number, new Number('10')), `Works for numbers - returns true when using constructor`);
-  t.false(is(Boolean, false), `Works for booleans - returns false for primitive`);
+  t.true(is(Boolean, false), `Works for booleans - returns true for primitive`);
   t.true(is(Boolean, new Boolean(false)), `Works for booleans - returns true when using constructor`);
   t.true(is(Function, () => null), `Works for functions`);
   //t.deepEqual(is(args..), 'Expected');

test/isBrowserTabFocused/isBrowserTabFocused.js

@@ -0,0 +1,2 @@
+const isBrowserTabFocused = () => !document.hidden;
+module.exports = isBrowserTabFocused;

test/isBrowserTabFocused/isBrowserTabFocused.test.js

@@ -0,0 +1,13 @@
+const test = require('tape');
+const isBrowserTabFocused = require('./isBrowserTabFocused.js');
+
+test('Testing isBrowserTabFocused', (t) => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  t.true(typeof isBrowserTabFocused === 'function', 'isBrowserTabFocused is a Function');
+  //t.deepEqual(isBrowserTabFocused(args..), 'Expected');
+  //t.equal(isBrowserTabFocused(args..), 'Expected');
+  //t.false(isBrowserTabFocused(args..), 'Expected');
+  //t.throws(isBrowserTabFocused(args..), 'Expected');
+  t.end();
+});