Allow using regex paths in blacklist config option

index.js

@@ -34,7 +34,17 @@ async function start(options) {
     const isUnique = url => !urls.find(oldUrl => short(url) === short(oldUrl))
 
     /** @param {Url} url */
-    const isntBlacklisted = url => !options.blacklist.includes(url.path)
+    const isntBlacklisted = url => 
+      !options.blacklist.some(e => {
+        if (typeof e == "string") {
+          return e == url.path;
+        } else if (e instanceof RegExp) {
+          return e.test(url.path);
+        } else {
+          console.warn("config option 'blacklist' should contain only strings and/or regular expressions");
+          return true; // Ignore non string or regex backlist item 
+        }
+      })
 
     /** @param {Url} url */
     const isValidPath = url =>

test/examples/config-file/config.spec.js

@@ -6,4 +6,6 @@ test('config file', t => {
     verifyFile('bar/index.html', new RegExp('<div id="location">http://spank.test/bar</div>'))
     t.assert(exists('link1/index.html'))
     t.falsy(exists('link2/index.html'), 'blacklisted links should not be rendered')
+    t.falsy(exists('link3/index.html'), 'blacklisted links should not be rendered')
+    t.falsy(exists('link4/index.html'), 'blacklisted links should not be rendered')
 })

test/examples/config-file/dist/main.js

@@ -4,4 +4,6 @@ document.getElementById('app').innerHTML =
     <div id="location">${window.location.href}</div>
     <a href="/link1">link1</a>
     <a href="/link2">link2</a>
+    <a href="/link3">link3</a>
+    <a href="/link4">link4</a>
 `

test/examples/config-file/spank.config.js

@@ -9,5 +9,5 @@ module.exports = {
         '/bar',
         '/baz'
     ],
-    blacklist: ['/link2']
+    blacklist: ['/link2', /\/link[3|4]/]
 }