Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 | 38x 4x 34x 3x 31x 31x 31x 38x 38x 38x 5x 1x 4x 5x 38x 38x 38x 28x 28x 28x 1x 27x 30x 7x 7x 7x 7x 2x 1x 2x 2x 2x 2x 2x 1x 2x 9x 5x 30x 30x 39x 39x 39x 39x 39x 41x 39x 2x 2x 2x 2x 2x 2x 2x 2x 39x 39x 39x 2x 2x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 39x 39x 1x 38x 39x 39x 2x | /**
* Clean hydrate() API for Coherent.js
*
* Integrates event delegation, state serialization, and mismatch detection
* into a simple function: hydrate(component, container, options)
*
* @module @coherent.js/client/hydrate
*/
import { eventDelegation, handlerRegistry } from './events/index.js';
import { extractState, serializeState } from './hydration/index.js';
import { detectMismatch, reportMismatches } from './hydration/index.js';
/**
* Hydrate a server-rendered component
*
* @param {Function} component - Component function that returns virtual DOM
* @param {HTMLElement} container - DOM element containing server-rendered HTML
* @param {Object} [options] - Hydration options
* @param {Object} [options.initialState] - Initial state to override extracted state
* @param {boolean} [options.detectMismatch=true] - Enable mismatch detection (dev mode)
* @param {boolean} [options.strict=false] - Throw on mismatch instead of warning
* @param {Function} [options.onMismatch] - Custom mismatch handler
* @param {Object} [options.props] - Additional props to pass to component
* @returns {Object} Control object with unmount(), rerender(), getState(), setState()
*/
export function hydrate(component, container, options = {}) {
// Validate inputs
if (typeof component !== 'function') {
throw new Error(
`hydrate() requires a component function, received: ${typeof component}`
);
}
if (!container || typeof container.getAttribute !== 'function') {
throw new Error(
`hydrate() requires a valid DOM element as container, received: ${
container === null ? 'null' : typeof container
}`
);
}
// Initialize event delegation (idempotent)
eventDelegation.initialize();
// Extract options with defaults
const {
initialState: providedState,
detectMismatch: shouldDetectMismatch = process.env.NODE_ENV !== 'production',
strict = false,
onMismatch,
props: additionalProps = {},
} = options;
// Extract state from DOM data-state attribute, or use provided initial state
let state = providedState ?? extractState(container) ?? {};
// Store event listeners for cleanup
const eventListeners = [];
// Track registered handler IDs for cleanup
const registeredHandlerIds = new Set();
// Create component reference for handler registry
const componentRef = {
getState: () => state,
setState: (newState) => {
if (typeof newState === 'function') {
state = { ...state, ...newState(state) };
} else {
state = { ...state, ...newState };
}
// Re-render on state change
doRerender();
},
};
// Generate virtual DOM from component
const componentProps = { ...additionalProps, ...state };
let virtualDOM = component(componentProps);
// Detect mismatches if enabled
if (shouldDetectMismatch) {
const mismatches = detectMismatch(container, virtualDOM);
Eif (mismatches.length > 0) {
if (onMismatch) {
onMismatch(mismatches);
} else {
reportMismatches(mismatches, {
componentName: component.name || 'Anonymous',
strict,
});
}
}
}
// Walk virtual DOM and register event handlers
registerEventHandlers(container, virtualDOM, componentRef, registeredHandlerIds);
/**
* Re-render the component with current state
*/
function doRerender() {
const newProps = { ...additionalProps, ...state };
virtualDOM = component(newProps);
// Update DOM with new virtual DOM
// For now, we do a simple patch - just update text content and attributes
// Full reconciliation would be in a separate module
patchDOM(container, virtualDOM);
// Re-register event handlers after DOM update
registerEventHandlers(container, virtualDOM, componentRef, registeredHandlerIds);
}
/**
* Unmount the component and clean up
*/
function unmount() {
// Remove registered event handlers
for (const handlerId of registeredHandlerIds) {
handlerRegistry.unregister(handlerId);
}
registeredHandlerIds.clear();
// Remove direct event listeners
for (const { element, event, handler, options } of eventListeners) {
element.removeEventListener(event, handler, options);
}
eventListeners.length = 0;
// Clear container's hydration marker
container.removeAttribute('data-coherent-hydrated');
}
/**
* Force re-render with optional new props
* @param {Object} [newProps] - New props to merge
*/
function rerender(newProps) {
if (newProps) {
Object.assign(additionalProps, newProps);
}
doRerender();
}
/**
* Get current state
* @returns {Object} Current state
*/
function getState() {
return { ...state };
}
/**
* Set state and trigger re-render
* @param {Object|Function} newState - New state or updater function
*/
function setState(newState) {
componentRef.setState(newState);
}
// Mark container as hydrated
container.setAttribute('data-coherent-hydrated', 'true');
// Return control object
return {
unmount,
rerender,
getState,
setState,
};
}
/**
* Walk virtual DOM tree and register event handlers
* @private
*/
function registerEventHandlers(domElement, vNode, componentRef, handlerIds) {
Iif (!vNode || typeof vNode !== 'object' || Array.isArray(vNode)) {
return;
}
const tagName = Object.keys(vNode)[0];
const props = vNode[tagName];
Iif (!props || typeof props !== 'object') {
return;
}
// Look for event handler props (on* functions)
const eventProps = Object.keys(props).filter(
(key) => key.startsWith('on') && typeof props[key] === 'function'
);
for (const eventProp of eventProps) {
const eventType = eventProp.slice(2).toLowerCase(); // onClick -> click
const handler = props[eventProp];
// Generate unique handler ID
const handlerId = `${tagName}-${eventType}-${Math.random().toString(36).slice(2, 9)}`;
// Register handler
handlerRegistry.register(handlerId, handler, componentRef);
handlerIds.add(handlerId);
// Set data attribute on DOM element for delegation
const attrName = `data-coherent-${eventType}`;
Eif (domElement.setAttribute) {
domElement.setAttribute(attrName, handlerId);
}
}
// Recursively process children
const children = getVNodeChildren(props);
const domChildren = getSignificantDOMChildren(domElement);
children.forEach((child, index) => {
Eif (child && typeof child === 'object' && !Array.isArray(child) && domChildren[index]) {
registerEventHandlers(domChildren[index], child, componentRef, handlerIds);
}
});
}
/**
* Simple DOM patching for re-renders
* @private
*/
function patchDOM(domElement, vNode) {
Iif (!vNode || !domElement) {
return;
}
// Handle text/number
Iif (typeof vNode === 'string' || typeof vNode === 'number') {
if (domElement.textContent !== String(vNode)) {
domElement.textContent = String(vNode);
}
return;
}
// Handle arrays
Iif (Array.isArray(vNode)) {
return; // Array patching would need reconciliation
}
Iif (typeof vNode !== 'object') {
return;
}
const tagName = Object.keys(vNode)[0];
const props = vNode[tagName] || {};
// Update attributes
const attributeMap = {
className: 'class',
htmlFor: 'for',
};
for (const [key, value] of Object.entries(props)) {
Eif (key === 'children' || key === 'text' || key.startsWith('on')) {
continue;
}
const attrName = attributeMap[key] || key;
if (value === true) {
domElement.setAttribute(attrName, '');
} else if (value === false || value === null || value === undefined) {
domElement.removeAttribute(attrName);
} else if (domElement.getAttribute(attrName) !== String(value)) {
domElement.setAttribute(attrName, String(value));
}
}
// Handle text content
Eif (props.text !== undefined) {
const textContent = String(props.text);
Eif (domElement.textContent !== textContent) {
domElement.textContent = textContent;
}
return;
}
// Recursively patch children
const children = getVNodeChildren(props);
const domChildren = getSignificantDOMChildren(domElement);
children.forEach((child, index) => {
if (domChildren[index]) {
patchDOM(domChildren[index], child);
}
});
}
/**
* Get children from virtual node props
* @private
*/
function getVNodeChildren(props) {
Iif (!props) return [];
if (props.children) {
return Array.isArray(props.children) ? props.children : [props.children];
}
return [];
}
/**
* Get significant DOM children (elements and non-whitespace text)
* @private
*/
function getSignificantDOMChildren(element) {
Iif (!element || !element.childNodes) return [];
return Array.from(element.childNodes).filter((node) => {
Eif (node.nodeType === 1) return true; // Element
if (node.nodeType === 3) {
// Text node
return node.textContent && node.textContent.trim().length > 0;
}
return false;
});
}
export default hydrate;
|