How to nicely filter inside an array of object?

Also ES6 comes with includes which will replace that ugly indexOf(str) >= 0, supported in the most important browsers like Edge, FF>= 43, Chrome and Opera, and Node >= 4, it would look like:return this.items.filter((item) => {

return this.items.filter((item) => {
  if (item.id.contains(str) ||
      item.name.contains(str) ||
      item.position.contains(str)) {
    return true
  }
  return false
})