fix: Prevent input undefined

6 years ago · 97c03df4ec
1 changed files with 1 additions and 1 deletions
--- a/index.js
+++ b/index.js
@ -33,7 +33,7 @@ module.exports = postcss.plugin('postcss-px-to-viewport', function (options) {
  return function (css) {
    css.walkRules(function (rule) {
      // Add exclude option to ignore some files like 'node_modules'
-      var file = rule.source.input.file;
+      var file = rule.source && rule.source.input.file;

      if (opts.exclude && file) {
        if (Object.prototype.toString.call(opts.exclude) === '[object RegExp]') {