Normalizer fails when selector.val is undefined

Description

   // normalize interpolated selectors with comma
  group.nodes.forEach(function(selector, i){
    if (!~selector.val.indexOf(',')) return;
    if (~selector.val.indexOf('\\,')) {
      selector.val = selector.val.replace(/\\,/g, ',');
      return;
    }

Contributor guide

Tech stack

javascriptnodejscss

Domain

frontendtoolingdeveloper experience

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

2

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

under 1 hour

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Basic JavaScript

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

85

Research direction

The bug is in normalizer.js at line 247. The code assumes selector.val is a string, but it can be undefined. The fix would be to add a check for undefined before accessing selector.val.indexOf. Look at the surrounding code to ensure consistency. The issue is open and no assignee, so a contributor can submit a PR.