frontend

add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'nonce-$request_id'; style-src 'self' https://fonts.googleapis.com 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' https://fonts.gstatic.com data:; connect-src 'self' https://api.example.com; frame-ancestors 'none'; base-uri 'self'; object-src 'none'" always;

# Controller responding with Turbo Stream
class PostsController < ApplicationController
  def create
    @post = Post.new(post_params)

    if @post.save

import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static targets = ["dialog", "message"]

  connect() {

import React, { useState, useEffect, useCallback, useMemo, useRef, useContext } from 'react';

// 1. useState - managing component state
function Counter() {
  const [count, setCount] = useState(0);
  const [name, setName] = useState('');

export function clamp(value, min, max) {
  return Math.min(Math.max(value, min), max);
}

export function move(list, from, to) {
  const next = list.slice();

import { useReducer, useCallback } from 'react';

const initialState = (present) => ({ past: [], present, future: [] });

function historyReducer(state, action) {
  const { past, present, future } = state;

export const initialState = (steps, initialData = {}) => ({
  steps,
  stepIndex: 0,
  data: initialData,
  errors: {},
});

import * as Turbo from "@hotwired/turbo";

function metaContent(name) {
  const el = document.querySelector(`meta[name="${name}"]`);
  return el ? el.getAttribute("content") : null;
}

<div class="dashboard">
  <header class="dashboard__header">
    <h1>Overview</h1>
    <p class="muted">Real-time metrics update as they load.</p>
  </header>

<%= form_with model: @profile do |form| %>
  <div
    class="field"
    data-controller="character-count"
    data-character-count-max-value="280"
  >

import { useState, useRef, useEffect, useCallback } from "react";

export function useCarousel(length, { delay = 4000 } = {}) {
  const [index, setIndex] = useState(0);
  const [paused, setPaused] = useState(false);
  const savedCallback = useRef(null);

import { useCallback, useEffect, useRef, useState } from "react";

export function useIntersectionObserver(options?: IntersectionObserverInit) {
  const [isIntersecting, setIsIntersecting] = useState(false);
  const nodeRef = useRef<Element | null>(null);
  const optionsKey = JSON.stringify(options ?? {});