Method every

external/.scrollLibs.js:16822–16829

(fn)

    return this.getSubparticles().reverse().find(fn)
  }
  every(fn) {
    let index = 0
    for (let particle of this.getTopDownArrayIterator()) {
      if (!fn(particle, index)) return false
      index++
    }
    return true
  }
  forEach(fn) {
    this.getSubparticles().forEach(fn)
    return this