Method toggle

external/.scrollLibs.js:24610–24619

(cue, contentOptions)

  }
  // todo: move to keyword particle class?
  toggle(cue, contentOptions) {
    const currentParticle = this.getParticle(cue)
    if (!contentOptions) return currentParticle ? currentParticle.unmountAndDestroy() : this.appendLine(cue)
    const currentContent = currentParticle === undefined ? undefined : currentParticle.content
    const index = contentOptions.indexOf(currentContent)
    const newContent = index === -1 || index + 1 === contentOptions.length ? contentOptions[0] : contentOptions[index + 1]
    this.delete(cue)
    if (newContent) this.touchParticle(cue).setContent(newContent)
    return newContent
  }
  isMounted() {
    return !!this._htmlStumpParticle
  }