notes/node_modules/stylelint/lib/utils/isKeyframeSelector.js

/* @flow */
"use strict"

const keywordSets = require("../reference/keywordSets")

/**
 * Check whether a string is a keyframe selector.
 */
module.exports = function (selector/*: string*/)/*: boolean*/ {
  if (keywordSets.keyframeSelectorKeywords.has(selector)) {
    return true
  }

  // Percentages
  if (/^(?:\d+\.?\d*|\d*\.?\d+)%$/.test(selector)) {
    return true
  }

  return false
}