render(): void {
    super.render()

    this.input_el = textarea({
      class: "bk-input",
      name: this.model.name,
      disabled: this.model.disabled,
      placeholder: this.model.placeholder,
      cols: this.model.cols,
      rows: this.model.rows,
      maxLength: this.model.max_length,
    })
    this.input_el.textContent = this.model.value
    this.input_el.addEventListener("change", () => this.change_input())
    this.group_el.appendChild(this.input_el)
  }

 protected _createInput(): HTMLTextAreaElement {
   return textarea()
 }

 protected _createInput() {
   return textarea()
 }