improve slug by replacing diacritics and removing unwanted characters

browser/lib/slugify.js

@@ -1,6 +1,17 @@
-module.exports = function slugify (title) {
-  return encodeURI(title.trim()
-    .replace(/[\]\[\!\"\#\$\%\&\'\(\)\*\+\,\.\/\:\;\<\=\>\?\@\\\^\_\{\|\}\~]/g, '')
-    .replace(/\s+/g, '-'))
-    .replace(/\-+$/, '')
+import diacritics from 'diacritics-map'
+
+function replaceDiacritics(str) {
+  return str.replace(/[À-ž]/g, function(ch) {
+    return diacritics[ch] || ch;
+  });
+}
+
+module.exports = function slugify (title) {
+  let slug = title.trim()
+
+  slug = replaceDiacritics(slug)
+
+  slug = slug.replace(/[^\w\s-]/g, '').replace(/\s+/g, '-')
+
+  return encodeURI(slug).replace(/\-+$/, '')
 }