update relativize to return to if from is falsy

diff --git a/src/helpers/relativize.js b/src/helpers/relativize.js
index f9788c0..090ee24 100644 (file)
--- a/src/helpers/relativize.js
+++ b/src/helpers/relativize.js
@@ -4,7 +4,7 @@ const { posix: path } = require('path')
 
 // TODO memoize
 module.exports = (from, to) => {
-  if (to.charAt() === '#') return to
+  if (!from || to.charAt() === '#') return to
   let hash = ''
   const hashIdx = to.indexOf('#')
   if (~hashIdx) {