Relative baseUrl, marked#1526

__tests__/base/heading_id

@@ -6,4 +6,4 @@ headerId: true
 
 
 
-<h2 id="heading-with-a-link"><code>Heading</code> with a <a href="http://example.com">link</a></h2>
+<h2 id="heading-with-a-link"><code>Heading</code> with a <a href="http://example.com">link</a></h2>

__tests__/option/baseUrl

@@ -0,0 +1,52 @@
+baseUrl: '/base/'
+
+===
+
+# Absolutization of RFC 3986 URIs
+
+## Absolute URI
+[![section 4.3](http://example.com/logo)](http://example.com/)
+
+## Network-path reference
+[![section 4.2](//example.com/logo)](//example.com/)
+
+## Absolute path
+[![section 4.2](/path/to/img)](/path/to/content)
+
+## Relative path
+[![section 4.2](img)](content)
+
+## Dot-relative path
+[![section 3.3](./img)](./content)
+
+[![section 3.3](../img)](../content)
+
+## Same-document query
+[![section 4.4](?type=image)](?)
+
+## Same-document fragment
+[![section 4.4](#img)](#)
+
+## Empty
+[section 4.2]()
+
+
+
+<h1>Absolutization of RFC 3986 URIs</h1>
+<h2>Absolute URI</h2>
+<p><a href="http://example.com/"><img src="http://example.com/logo" alt="section 4.3"></a></p>
+<h2>Network-path reference</h2>
+<p><a href="//example.com/"><img src="//example.com/logo" alt="section 4.2"></a></p>
+<h2>Absolute path</h2>
+<p><a href="/path/to/content"><img src="/path/to/img" alt="section 4.2"></a></p>
+<h2>Relative path</h2>
+<p><a href="/base/content"><img src="/base/img" alt="section 4.2"></a></p>
+<h2>Dot-relative path</h2>
+<p><a href="/base/./content"><img src="/base/./img" alt="section 3.3"></a></p>
+<p><a href="/base/../content"><img src="/base/../img" alt="section 3.3"></a></p>
+<h2>Same-document query</h2>
+<p><a href="?"><img src="?type=image" alt="section 4.4"></a></p>
+<h2>Same-document fragment</h2>
+<p><a href="#"><img src="#img" alt="section 4.4"></a></p>
+<h2>Empty</h2>
+<p><a href="">section 4.2</a></p>

src/helpers.ts

@@ -133,11 +133,18 @@ export function resolveUrl(base: string, href: string): string {
   }
 
   base = baseUrls[baseUrlsKey];
+  const relativeBase = base.indexOf(':') === -1;
 
   if (href.slice(0, 2) === '//') {
-    return base.replace(/:[\s\S]*/, ':') + href;
+    if (relativeBase) {
+      return href;
+    }
+    return base.replace(/^([^:]+:)[\s\S]*$/, '$1') + href;
   } else if (href.charAt(0) === '/') {
-    return base.replace(/(:\/*[^/]*)[\s\S]*/, '$1') + href;
+    if (relativeBase) {
+      return href;
+    }
+    return base.replace(/^([^:]+:\/*[^/]*)[\s\S]*$/, '$1') + href;
   } else {
     return base + href;
   }