Match optional scheme for any pattern

src/regex.js

@@ -9,6 +9,7 @@ const WhitespaceCommaDotOrEndOfLine = `[${escapeChar}s,.]|$`;
 const number = `[0-9]`;
 
 // Sections
+const optionalScheme = `((https?:)?//)?`;
 const hostname = `(${notWhitespaceOrComma}+${escapeChar}.(${validTlds}))`;
 const ip = `(${number}{1,3}${escapeChar}.){3}${number}{1,3}`;
 const optionalPortNumber = `(:${number}+)?`;
@@ -16,6 +17,6 @@ const optionalSlash = `(${escapeChar}/(${notWhitespaceCommaOrDot}*)?)?`;
 const endsWithButDontMatch = `(?=${WhitespaceCommaDotOrEndOfLine})`;
 
 // Build
-const regex = `(localhost|${hostname}|${ip})${optionalPortNumber}${optionalSlash}${endsWithButDontMatch}`;
+const regex = `${optionalScheme}(localhost|${hostname}|${ip})${optionalPortNumber}${optionalSlash}${endsWithButDontMatch}`;
 
 export default new RegExp(regex, 'gi');

test/matches.json

@@ -47,6 +47,18 @@
     "description": "IP address with trailing slash",
     "url": "192.168.0.1/"
   },
+  {
+    "description": "IP address starting with http://",
+    "url": "http://192.168.0.1"
+  },
+  {
+    "description": "IP address starting with https://",
+    "url": "https://192.168.0.1"
+  },
+  {
+    "description": "IP address starting with //",
+    "url": "//192.168.0.1"
+  },
   {
     "description": "Localhost",
     "url": "localhost"
@@ -55,6 +67,18 @@
     "description": "Localhost with trailing slash",
     "url": "localhost/"
   },
+  {
+    "description": "Localhost starting with http://",
+    "url": "http://localhost"
+  },
+  {
+    "description": "Localhost starting with https://",
+    "url": "https://localhost"
+  },
+  {
+    "description": "Localhost starting with //",
+    "url": "//localhost"
+  },
   {
     "description": "Url with slug",
     "url": "url.com/slug"