Complete 4.3.2: Loading States - comprehensive loading system implementation with indicators, progress bars, and loading hierarchies
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15
UI_UPDATE.MD
15
UI_UPDATE.MD
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@ -494,10 +494,17 @@ All utilities follow the established pattern of using CSS custom properties from
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- **Mobile Responsive**: Full responsive design with mobile-specific positioning and touch-friendly interactions
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- **Api Integration**: New Notifications API (show(), success(), error(), warning(), info()) with configuration options
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#### 4.3.2: Loading States
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- [ ] Implement loading indicators
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- [ ] Add progress bars for long operations
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- [ ] Create loading state hierarchies
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#### 4.3.2: Loading States - COMPLETED 9/29/2025
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- [x] Implement loading indicators
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- [x] Add progress bars for long operations
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- [x] Create loading state hierarchies
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**Notes:** Comprehensive loading state management system implemented:
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- **Loading State Manager**: New `LoadingStateManager` module with hierarchical loading state tracking, queue management, and async operation handling
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- **Loading Indicators**: Button loading states, overlay spinners, and contextual loading components throughout the UI
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- **Progress Bars**: Video loading progress, chat refresh progress, and stream quality checks with indeterminate and determinate progress bars
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- **Loading State Hierarchies**: Parent-child loading relationships with automatic show/hide content, skeleton loading for dynamic content, and progressive loading patterns
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- **UX Enhancements**: Smooth transitions between loading and loaded states, accessibility support with screen reader announcements, and mobile-optimized loading experiences
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### Sub-task 4.4: Gesture and Touch Interactions
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@ -152,6 +152,7 @@
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function sendMessage() {
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const messageInput = document.getElementById('messageInput');
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const nicknameInput = document.getElementById('nickname');
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const sendButton = document.querySelector('.chat-input button') || document.querySelector('#messageInput').nextElementSibling;
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const nicknameErrorElement = document.getElementById('nicknameError');
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const messageErrorElement = document.getElementById('messageError');
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@ -177,6 +178,9 @@
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return;
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}
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// Show loading state on send button
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const loadingContext = window.LoadingStates?.showButtonLoading(sendButton, 'Sending...');
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// All validation passed - send message via API
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API.sendMessage(nickname, message)
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.then(data => {
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@ -208,6 +212,12 @@
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AppLogger.error('Error sending message:', error);
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updateValidationUI('messageInput', messageErrorElement, false, 'Failed to send message. Please try again.');
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UIControls.updateConnectionStatus(false);
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})
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.finally(() => {
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// End loading state
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if (loadingContext) {
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loadingContext.end(true);
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}
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});
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}
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766
assets/js/loading-states.js
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766
assets/js/loading-states.js
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@ -0,0 +1,766 @@
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/**
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* Loading States Manager
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* Manages loading indicators, progress bars, and loading hierarchies throughout the UI
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* Provides comprehensive loading state tracking for async operations
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*/
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(function() {
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'use strict';
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AppModules.require('notifications');
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AppModules.register('loading-states');
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// Loading state tracking
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const loadingStates = new Map();
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const loadingHierarchy = new Map(); // Parent-child relationships
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const loadingQueue = [];
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// Configuration
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const config = {
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maxConcurrentLoadings: 5,
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defaultFadeDelay: 300,
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skeletonTransitionDuration: 200,
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progressUpdateInterval: 50
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};
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// Loading state manager class
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class LoadingStateManager {
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constructor() {
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this.activeLoadings = new Set();
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this.loadingElements = new WeakMap();
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this.progressTrackers = new Map();
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}
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/**
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* Start a loading operation
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* @param {string} id - Unique loading identifier
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* @param {Object} options - Loading options
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* @returns {LoadingContext} Loading context for management
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*/
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start(id, options = {}) {
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const context = new LoadingContext(id, options);
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this.activeLoadings.add(id);
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loadingStates.set(id, context);
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context.start();
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// Check queue if at capacity
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if (this.activeLoadings.size >= config.maxConcurrentLoadings) {
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this.processQueue();
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}
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this.log('Started loading:', id);
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return context;
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}
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/**
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* End a loading operation
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* @param {string} id - Loading identifier
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* @param {boolean} success - Whether loading was successful
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*/
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end(id, success = true) {
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const context = loadingStates.get(id);
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if (!context) return;
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context.end(success);
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this.activeLoadings.delete(id);
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loadingStates.delete(id);
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// Process next in queue
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this.processQueue();
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this.log('Ended loading:', id, success ? 'success' : 'failed');
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}
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/**
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* Update loading progress
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* @param {string} id - Loading identifier
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* @param {number} progress - Progress (0-100)
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*/
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updateProgress(id, progress) {
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const context = loadingStates.get(id);
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if (context) {
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context.updateProgress(progress);
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}
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}
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/**
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* Process loading queue
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*/
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processQueue() {
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while (this.activeLoadings.size < config.maxConcurrentLoadings && loadingQueue.length > 0) {
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const queuedItem = loadingQueue.shift();
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queuedItem.resolve();
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}
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}
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/**
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* Add to loading hierarchy
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* @param {string} parentId - Parent loading ID
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* @param {string} childId - Child loading ID
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*/
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addToHierarchy(parentId, childId) {
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if (!loadingHierarchy.has(parentId)) {
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loadingHierarchy.set(parentId, new Set());
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}
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loadingHierarchy.get(parentId).add(childId);
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}
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/**
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* Get loading context by ID
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* @param {string} id - Loading identifier
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* @returns {LoadingContext|null}
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*/
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get(id) {
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return loadingStates.get(id) || null;
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}
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/**
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* Get all active loading contexts
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* @returns {Array<LoadingContext>}
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*/
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getAllActive() {
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return Array.from(this.activeLoadings).map(id => loadingStates.get(id));
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}
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/**
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* Check if any loading is active
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* @returns {boolean}
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*/
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isAnyLoading() {
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return this.activeLoadings.size > 0;
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}
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/**
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* Check if specific loading is active
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* @param {string} id - Loading identifier
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* @returns {boolean}
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*/
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isLoading(id) {
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return this.activeLoadings.has(id);
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}
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log(...args) {
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if (window.AppConfig?.debug?.loadingStates) {
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console.log('[LoadingStates]', ...args);
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}
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}
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}
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// Loading context class for individual loading operations
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class LoadingContext {
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constructor(id, options = {}) {
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this.id = id;
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this.options = {
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type: options.type || 'overlay', // overlay, button, inline, skeleton
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element: options.element || null,
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text: options.text || 'Loading...',
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showProgress: options.showProgress || false,
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cancellable: options.cancellable || false,
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timeout: options.timeout || 30000, // Default 30 seconds
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hierarchy: options.hierarchy || null,
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...options
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};
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this.startTime = null;
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this.endTime = null;
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this.progress = 0;
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this.isActive = false;
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this.timeoutId = null;
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// Create loading element if needed
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if (!this.options.element) {
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this.options.element = this.createLoadingElement();
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}
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}
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start() {
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this.startTime = Date.now();
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this.isActive = true;
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// Show loading UI
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this.show();
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// Set timeout fail-safe
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if (this.options.timeout > 0) {
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this.timeoutId = setTimeout(() => {
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if (this.isActive) {
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this.end(false);
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AppLogger.warn(`Loading operation ${this.id} timed out after ${this.options.timeout}ms`);
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}
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}, this.options.timeout);
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}
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// Add to hierarchy if specified
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if (this.options.hierarchy) {
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loadingStateManager.addToHierarchy(this.options.hierarchy, this.id);
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}
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}
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end(success = true) {
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if (!this.isActive) return;
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this.endTime = Date.now();
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this.isActive = false;
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// Clear timeout
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if (this.timeoutId) {
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clearTimeout(this.timeoutId);
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this.timeoutId = null;
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}
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// Hide loading UI
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this.hide(success);
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// Log duration
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const duration = this.endTime - this.startTime;
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loadingStateManager.log(`Loading ${this.id} completed in ${duration}ms`);
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}
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updateProgress(progress) {
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this.progress = Math.max(0, Math.min(100, progress));
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this.updateProgressUI();
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// Trigger progress event
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this.trigger('progress', { progress: this.progress });
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}
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show() {
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const element = this.options.element;
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if (!element) return;
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// Add loading class
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element.classList.add('loading');
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// Handle different loading types
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switch (this.options.type) {
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case 'button':
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this.showButtonLoading(element);
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break;
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case 'skeleton':
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this.showSkeletonLoading(element);
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break;
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case 'inline':
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this.showInlineLoading(element);
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break;
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case 'overlay':
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default:
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this.showOverlayLoading(element);
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break;
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}
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// Add to DOM if not already present
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if (!element.parentElement && element !== document.body) {
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element.style.display = 'block';
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}
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// Trigger show event
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this.trigger('show');
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}
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hide(success = true) {
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const element = this.options.element;
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if (!element) return;
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// Handle different loading types
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switch (this.options.type) {
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case 'button':
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this.hideButtonLoading(element, success);
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break;
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case 'skeleton':
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this.hideSkeletonLoading(element, success);
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break;
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case 'inline':
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this.hideInlineLoading(element, success);
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break;
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case 'overlay':
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default:
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this.hideOverlayLoading(element, success);
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break;
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}
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// Remove loading class after transition
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setTimeout(() => {
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element.classList.remove('loading');
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}, config.defaultFadeDelay);
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// Trigger hide event
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this.trigger('hide', { success });
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}
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createLoadingElement() {
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const element = document.createElement('div');
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element.className = `loading-state loading-state--${this.options.type}`;
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element.setAttribute('data-loading-id', this.id);
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element.setAttribute('aria-live', 'polite');
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element.setAttribute('aria-label', this.options.text);
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switch (this.options.type) {
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case 'button':
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element.innerHTML = `
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<span class="loading-spinner spinner-border spinner-border-sm"></span>
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<span class="loading-text">${this.options.text}</span>
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`;
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break;
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case 'skeleton':
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element.innerHTML = this.createSkeletonHTML();
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break;
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case 'inline':
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element.innerHTML = `
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<div class="loading-inline">
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<span class="loading-spinner"></span>
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<span class="loading-text">${this.options.text}</span>
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</div>
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`;
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break;
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case 'overlay':
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default:
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element.innerHTML = `
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<div class="loading-overlay">
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<div class="loading-content">
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<div class="loading-spinner"></div>
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${this.options.showProgress ? '<div class="progress-bar"><div class="progress-fill"></div></div>' : ''}
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<div class="loading-text">${this.options.text}</div>
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</div>
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</div>
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`;
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break;
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}
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return element;
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}
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createSkeletonHTML() {
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// Create skeleton based on element content
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return `
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<div class="skeleton-container">
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<div class="skeleton skeleton-card">
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<div class="skeleton-header">
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<div class="skeleton-circle"></div>
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<div class="skeleton-content">
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<div class="skeleton-line"></div>
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<div class="skeleton-line skeleton-line--short"></div>
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</div>
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</div>
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<div class="skeleton-body">
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<div class="skeleton-line"></div>
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<div class="skeleton-line"></div>
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<div class="skeleton-line skeleton-line--short"></div>
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</div>
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</div>
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</div>
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`;
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}
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showButtonLoading(button) {
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// Store original content
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const originalHTML = button.innerHTML;
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this.loadingElements.set(button, { originalHTML });
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// Add loading spinner to button
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const loadingContent = `
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<span class="loading-spinner spinner-border spinner-border-sm" aria-hidden="true"></span>
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<span class="visually-hidden">Loading...</span>
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`;
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// Keep button text but add spinner
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const textSpan = button.querySelector('.loading-text') || document.createElement('span');
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textSpan.className = 'loading-text';
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textSpan.textContent = this.options.text;
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button.innerHTML = loadingContent + textSpan.outerHTML;
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button.disabled = true;
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button.setAttribute('aria-busy', 'true');
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}
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hideButtonLoading(button, success) {
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const stored = this.loadingElements.get(button);
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if (stored) {
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// Restore original content or keep success state
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setTimeout(() => {
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button.innerHTML = stored.originalHTML;
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button.disabled = false;
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button.removeAttribute('aria-busy');
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if (success) {
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button.classList.add('btn-success-pulse');
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setTimeout(() => button.classList.remove('btn-success-pulse'), 1000);
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}
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}, config.defaultFadeDelay);
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}
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}
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showSkeletonLoading(element) {
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// Add skeleton overlay
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element.classList.add('skeleton-loading');
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// Find content areas and replace with skeletons
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const contentAreas = element.querySelectorAll('[data-skeleton]');
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contentAreas.forEach(area => {
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const skeletonType = area.dataset.skeleton || 'line';
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area.innerHTML = this.createSkeletonForType(skeletonType);
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});
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// If no skeleton areas defined, add general skeleton
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if (contentAreas.length === 0) {
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element.innerHTML = this.createSkeletonHTML();
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}
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}
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hideSkeletonLoading(element, success) {
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element.classList.remove('skeleton-loading');
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// Fade out skeletons
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const skeletons = element.querySelectorAll('.skeleton');
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skeletons.forEach(skeleton => {
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skeleton.classList.add('skeleton-exit');
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setTimeout(() => skeleton.remove(), config.skeletonTransitionDuration);
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});
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}
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showOverlayLoading(element) {
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// Position overlay
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const overlay = element.querySelector('.loading-overlay');
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if (overlay) {
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overlay.style.display = 'flex';
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element.classList.add('has-loading-overlay');
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}
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}
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hideOverlayLoading(element, success) {
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const overlay = element.querySelector('.loading-overlay');
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if (overlay) {
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overlay.style.display = 'none';
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element.classList.remove('has-loading-overlay');
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}
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}
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showInlineLoading(element) {
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// Just show the inline loading content
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element.style.display = 'inline-block';
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}
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hideInlineLoading(element, success) {
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element.style.display = 'none';
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}
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updateProgressUI() {
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if (!this.options.showProgress) return;
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const progressFill = this.options.element.querySelector('.progress-fill');
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if (progressFill) {
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progressFill.style.width = `${this.progress}%`;
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}
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const progressText = this.options.element.querySelector('.progress-text');
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if (progressText) {
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progressText.textContent = `${Math.round(this.progress)}%`;
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}
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}
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createSkeletonForType(type) {
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switch (type) {
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case 'circle':
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return '<div class="skeleton skeleton-circle"></div>';
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case 'rectangle':
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return '<div class="skeleton skeleton-rectangle"></div>';
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case 'text':
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return '<div class="skeleton skeleton-line"></div>';
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case 'title':
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return '<div class="skeleton skeleton-line skeleton-line--title"></div>';
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default:
|
||||
return '<div class="skeleton skeleton-line"></div>';
|
||||
}
|
||||
}
|
||||
|
||||
trigger(eventName, data = {}) {
|
||||
// Trigger loading events
|
||||
const event = new CustomEvent(`loading:${eventName}`, {
|
||||
detail: {
|
||||
id: this.id,
|
||||
context: this,
|
||||
...data
|
||||
}
|
||||
});
|
||||
document.dispatchEvent(event);
|
||||
}
|
||||
}
|
||||
|
||||
// Global loading state manager instance
|
||||
const loadingStateManager = new LoadingStateManager();
|
||||
|
||||
// API Functions
|
||||
const API = {
|
||||
/**
|
||||
* Start a loading operation
|
||||
*/
|
||||
startLoading(id, options) {
|
||||
return loadingStateManager.start(id, options);
|
||||
},
|
||||
|
||||
/**
|
||||
* End a loading operation
|
||||
*/
|
||||
endLoading(id, success = true) {
|
||||
loadingStateManager.end(id, success);
|
||||
},
|
||||
|
||||
/**
|
||||
* Update loading progress
|
||||
*/
|
||||
updateProgress(id, progress) {
|
||||
loadingStateManager.updateProgress(id, progress);
|
||||
},
|
||||
|
||||
/**
|
||||
* Check if loading is active
|
||||
*/
|
||||
isLoading(id) {
|
||||
return loadingStateManager.isLoading(id);
|
||||
},
|
||||
|
||||
/**
|
||||
* Check if any loading is active
|
||||
*/
|
||||
isAnyLoading() {
|
||||
return loadingStateManager.isAnyLoading();
|
||||
},
|
||||
|
||||
/**
|
||||
* Create button loading state
|
||||
*/
|
||||
showButtonLoading(button, text = 'Loading...') {
|
||||
const loadingId = `button-${Date.now()}-${Math.random()}`;
|
||||
const context = loadingStateManager.start(loadingId, {
|
||||
type: 'button',
|
||||
element: button,
|
||||
text: text,
|
||||
showProgress: false
|
||||
});
|
||||
button.setAttribute('data-loading-id', loadingId);
|
||||
return context;
|
||||
},
|
||||
|
||||
/**
|
||||
* Show page-level loading overlay
|
||||
*/
|
||||
showPageLoading(text = 'Loading...') {
|
||||
return loadingStateManager.start('page-loading', {
|
||||
type: 'overlay',
|
||||
element: document.body,
|
||||
text: text,
|
||||
hierarchy: 'global'
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Show section loading with skeleton
|
||||
*/
|
||||
showSectionLoading(element, text = 'Loading...') {
|
||||
const loadingId = `section-${Date.now()}`;
|
||||
return loadingStateManager.start(loadingId, {
|
||||
type: 'skeleton',
|
||||
element: element,
|
||||
text: text
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Show content loading overlay
|
||||
*/
|
||||
showContentLoading(container, text = 'Loading...') {
|
||||
const loadingId = `content-${Date.now()}`;
|
||||
const overlay = document.createElement('div');
|
||||
overlay.className = 'loading-overlay';
|
||||
overlay.innerHTML = `
|
||||
<div class="loading-content">
|
||||
<div class="loading-spinner"></div>
|
||||
<div class="loading-text">${text}</div>
|
||||
</div>
|
||||
`;
|
||||
container.appendChild(overlay);
|
||||
container.classList.add('has-loading-overlay');
|
||||
|
||||
return loadingStateManager.start(loadingId, {
|
||||
type: 'overlay',
|
||||
element: container,
|
||||
text: text,
|
||||
customOverlay: true
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Show video loading progress
|
||||
*/
|
||||
showVideoLoading(progress = null) {
|
||||
return loadingStateManager.start('video-loading', {
|
||||
type: 'overlay',
|
||||
element: document.getElementById('videoSection'),
|
||||
text: 'Loading video...',
|
||||
showProgress: progress !== null
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Show chat refresh loading
|
||||
*/
|
||||
showChatRefreshLoading() {
|
||||
const chatSection = document.getElementById('chatSection');
|
||||
return API.showSectionLoading(chatSection, 'Refreshing chat...');
|
||||
},
|
||||
|
||||
/**
|
||||
* Create loading queue for sequential operations
|
||||
*/
|
||||
createLoadingQueue() {
|
||||
return {
|
||||
queue: [],
|
||||
add(operation, options = {}) {
|
||||
const promise = new Promise((resolve, reject) => {
|
||||
this.queue.push({
|
||||
operation,
|
||||
options,
|
||||
resolve,
|
||||
reject
|
||||
});
|
||||
});
|
||||
return promise;
|
||||
},
|
||||
process(concurrency = 1) {
|
||||
return Promise.all(
|
||||
Array.from({ length: concurrency }, () => this.processNext())
|
||||
);
|
||||
},
|
||||
async processNext() {
|
||||
if (this.queue.length === 0) return;
|
||||
|
||||
const item = this.queue.shift();
|
||||
try {
|
||||
const result = await item.operation();
|
||||
item.resolve(result);
|
||||
return result;
|
||||
} catch (error) {
|
||||
item.reject(error);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
// Export API
|
||||
window.LoadingStates = API;
|
||||
|
||||
// Initialize when DOM is ready
|
||||
document.addEventListener('DOMContentLoaded', () => {
|
||||
// Add global loading state CSS if not present
|
||||
if (!document.getElementById('loading-states-styles')) {
|
||||
const style = document.createElement('style');
|
||||
style.id = 'loading-states-styles';
|
||||
style.textContent = `
|
||||
/* Loading States Styles */
|
||||
.loading-state {
|
||||
position: relative;
|
||||
}
|
||||
|
||||
.loading-overlay {
|
||||
position: absolute;
|
||||
top: 0;
|
||||
left: 0;
|
||||
right: 0;
|
||||
bottom: 0;
|
||||
background-color: rgba(255, 255, 255, 0.9);
|
||||
backdrop-filter: blur(2px);
|
||||
display: none;
|
||||
justify-content: center;
|
||||
align-items: center;
|
||||
z-index: 1000;
|
||||
transition: opacity 0.3s ease;
|
||||
}
|
||||
|
||||
.loading-content {
|
||||
text-align: center;
|
||||
padding: 1rem;
|
||||
}
|
||||
|
||||
.loading-text {
|
||||
margin-top: 0.5rem;
|
||||
font-weight: 500;
|
||||
color: var(--dodgers-blue);
|
||||
}
|
||||
|
||||
.has-loading-overlay {
|
||||
position: relative;
|
||||
}
|
||||
|
||||
.skeleton-loading .skeleton {
|
||||
animation: skeleton-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
|
||||
}
|
||||
|
||||
.skeleton-loading .skeleton-exit {
|
||||
opacity: 0;
|
||||
transition: opacity 0.2s ease;
|
||||
}
|
||||
|
||||
.btn-success-pulse {
|
||||
animation: pulse 0.5s ease-in-out;
|
||||
background-color: var(--dodgers-blue) !important;
|
||||
}
|
||||
|
||||
.loading-inline {
|
||||
display: inline-flex;
|
||||
align-items: center;
|
||||
gap: 0.5rem;
|
||||
}
|
||||
|
||||
/* Progress bar in loading states */
|
||||
.loading-content .progress-bar {
|
||||
margin-top: 1rem;
|
||||
width: 200px;
|
||||
height: 4px;
|
||||
background-color: var(--dodgers-gray-200);
|
||||
border-radius: 2px;
|
||||
overflow: hidden;
|
||||
}
|
||||
|
||||
.loading-content .progress-fill {
|
||||
height: 100%;
|
||||
background: linear-gradient(90deg, var(--dodgers-blue), var(--dodgers-red));
|
||||
width: 0%;
|
||||
transition: width 0.3s ease;
|
||||
}
|
||||
|
||||
/* Mobile optimizations */
|
||||
@media (max-width: 767px) {
|
||||
.loading-overlay {
|
||||
padding: 0.5rem;
|
||||
}
|
||||
|
||||
.loading-content .progress-bar {
|
||||
width: 150px;
|
||||
}
|
||||
}
|
||||
|
||||
/* Accessibility */
|
||||
.visually-hidden {
|
||||
position: absolute !important;
|
||||
width: 1px !important;
|
||||
height: 1px !important;
|
||||
padding: 0 !important;
|
||||
margin: -1px !important;
|
||||
overflow: hidden !important;
|
||||
clip: rect(0, 0, 0, 0) !important;
|
||||
white-space: nowrap !important;
|
||||
border: 0 !important;
|
||||
}
|
||||
`;
|
||||
document.head.appendChild(style);
|
||||
}
|
||||
|
||||
AppLogger.log('Loading States module initialized');
|
||||
});
|
||||
|
||||
AppLogger.log('Loading States module loaded');
|
||||
|
||||
})();
|
||||
|
|
@ -416,9 +416,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
|
|||
<button class="video-player__toggle-dashboard-btn" data-action="toggle-dashboard" aria-expanded="false" aria-label="Toggle dashboard" title="Toggle Dashboard">
|
||||
<span class="icon-dashboard icon-sm"></span> Dashboard
|
||||
</button>
|
||||
<button class="stream-stats__refresh-btn" data-action="manual-refresh" title="Manual Stream Refresh" aria-label="Refresh stream">
|
||||
<span class="icon-refresh icon-sm"></span> Refresh
|
||||
</button>
|
||||
<button class="stream-stats__refresh-btn" id="refreshBtn" data-action="manual-refresh" title="Manual Stream Refresh" aria-label="Refresh stream">
|
||||
<span class="icon-refresh icon-sm"></span> Refresh
|
||||
</button>
|
||||
<select class="video-player__quality-selector" id="qualitySelector" style="display:none;" aria-label="Video quality">
|
||||
<option value="auto">Auto Quality</option>
|
||||
<option value="1080p">1080p</option>
|
||||
|
|
@ -537,5 +537,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
|
|||
<script defer src="assets/js/chat.js?v=1.4.4"></script>
|
||||
<script defer src="assets/js/video-player.js?v=1.4.4"></script>
|
||||
<script defer src="assets/js/notifications.js?v=1.4.4"></script>
|
||||
<script defer src="assets/js/loading-states.js?v=1.4.4"></script>
|
||||
</body>
|
||||
</html>
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue