Merged branch 'master' into 'issue-62'

src/utils/index.ts

@@ -14,3 +14,4 @@ export * from './serialize'
 export * from './splitChunks'
 export * from './parseWeboutResponse'
 export * from './isUri'
+export * from './isUrl'

src/utils/isUrl.ts

@@ -0,0 +1,12 @@
+export const isUrl = (url: string): boolean => {
+  const pattern = new RegExp(
+    '^(http://|https://)[a-z0-9]+([-.]{1}[a-z0-9]+)*.[a-z]{2,5}(:[0-9]{1,5})?(/.*)?$',
+    'gi'
+  )
+
+  if (pattern.test(url)) return true
+  else
+    throw new Error(
+      `'${url}' is not a valid url. An example of a valid url is 'http://valid-url.com'.`
+    )
+}