notes/node_modules/stylelint/lib/rules/selectorListCommaWhitespaceChecker.js

"use strict"

const isStandardSyntaxRule = require("../utils/isStandardSyntaxRule")
const report = require("../utils/report")
const styleSearch = require("style-search")

module.exports = function (opts) {
  opts.root.walkRules(rule => {
    if (!isStandardSyntaxRule(rule)) {
      return
    }
    const selector = rule.selector
    styleSearch({
      source: selector,
      target: ",",
      functionArguments: "skip",
    }, match => {
      checkDelimiter(selector, match.startIndex, rule)
    })
  })

  function checkDelimiter(source, index, node) {
    opts.locationChecker({ source, index, err: m => report({
      message: m,
      node,
      index,
      result: opts.result,
      ruleName: opts.checkedRuleName,
    }),
    })
  }
}