如何修改<turbo-frame>元素中存在的新鲜加载/渲染内容？

您不必自己设置，只需添加到表单中并提交即可。srcturbo_frame: "name"

bin/rails g scaffold Item name
bin/rails db:migrate
bin/rails g stimulus search

# app/controllers/items_controller.rb

def index
  @items = if params[:search].present?
    Item.where(Item.arel_table[:name].matches("%#{params[:search]}%"))
  else
    Item.all
  end
end

# app/views/items/index.html.erb

<%= tag.div data: {controller: "search"} do %>

  <%= form_with url: :items, method: :get,
    data: {search_target: "form", turbo_frame: :items} do |f| %>
    <%# NOTE: target the frame    ^^^^^^^^^^^^^^^^^^^         %>

    <%= f.search_field :search, placeholder: "search...",
      data: {action: "search#autoSearch"} %>
  <% end %>

  <%= turbo_frame_tag :items, target: :_top,
    data: {search_target: "results", turbo_action: :advance} do %>
    <%# NOTE: to update url as well  ^^^^^^^^^^^^^^^^^^^^^^     %>

    <%= render @items %>
  <% end %>

<% end %>

// app/javascript/controllers/search_controller.js

import { Controller } from "@hotwired/stimulus";

// Connects to data-controller="search"
export default class extends Controller {
  static targets = ["form", "results", "item"];

  connect() {
    this.resultsTarget.addEventListener("turbo:frame-render", this.resultsHandler);
  }

  resultsHandler(event) {
    event.target.querySelectorAll("li").forEach((li) => { 
      li.setAttribute("loaded", true); // <li loaded="true"></li>
    });
  }

  autoSearch() {
    // don't search on every keystroke
    clearTimeout(this.timeout);
    this.timeout = setTimeout(() => this.formTarget.requestSubmit(), 500);
  }

  // NOTE: you can also add a target and use target callbacks
  // <li data-search-target="item"> </li>
  itemTargetConnected(element) {
    // to skip initial page load
    if (this.resultsTarget.src) {
      element.setAttribute("loaded", true);
    }
  }

  disconnect() {
    this.resultsTarget.removeEventListener("turbo:frame-render", this.resultsHandler);
  }
}

https://stimulus.hotwired.dev/reference/targets#connected-and-disconnected-callbacks

与其在控制器内添加事件侦听器，不如使用：data-action

<%= turbo_frame_tag :items, target: :_top,
  data: {
    turbo_action: :advance,
    action: "turbo:frame-render->search#resultsHandler"
  } do %>

  <%= render @items %>
<% end %>