text: // self.onmessage = function (event) {
  //   const data = event.data
  //   let { songs, likeIds } = data
  //   songs.forEach(song => {
  //     if (likeIds.includes(song.id)) {
  //       song.isLiked = true
  //     }
  //   })
  //   self.postMessage({ songs, likeIds })
  // }
  self.onmessage = function (event) {
    const data = event.data
    let { songs, id } = data
    let index = songs.findIndex(song => song.id == id)
    self.postMessage({index, id})
  }
  