Merge pull request #637 from Chalarangelo/isBrowser

[FEATURE] isBrowser

snippets/isBrowser.md

@@ -0,0 +1,17 @@
+### isBrowser
+
+Determines if the current runtime environment is a browser so that front-end modules can run on the server (Node)
+without throwing errors.
+
+Use `Array.includes()` on the `typeof` values of both `window` and `document` (globals usually only available in a 
+browser environment unless they were explicitly defined), which will return `true` if one of them is `undefined`. 
+`typeof` allows globals to be checked for existence without throwing a ReferenceError. If both of them are not `undefined`, then the current environment is assumed to be a browser.
+
+```js
+const isBrowser = () => ![typeof window, typeof document].includes('undefined')
+```
+
+```js
+isBrowser() // true (browser)
+isBrowser() // false (Node)
+```

tag_database

@@ -119,6 +119,7 @@ isAbsoluteURL:string,utility,browser,url
 isAnagram:string,regexp
 isArrayLike:type,array
 isBoolean:type
+isBrowser:utility,browser
 isDivisible:math
 isEmpty:type,array,object,string
 isEven:math