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* Coherent.js Web Components Integration
* Provides custom element and web component utilities
*/
import { render } from '@coherent.js/core';
/**
* Define a Coherent.js component as a custom element
*
* @param {string} name - Custom element tag name (must contain a hyphen)
* @param {Function|Object} component - Coherent.js component (function or object)
* @param {Object} [options] - Configuration options
* @param {boolean} [options.shadow] - Use Shadow DOM for style encapsulation
* @param {string[]} [options.observedAttributes] - Attributes to watch for changes
* @param {Object} [options.defaults] - Default property values
* @returns {Function|Object} The custom element class, or a server-side placeholder
*/
export function defineComponent(name, component, options = {}) {
if (typeof window === 'undefined') {
// Server-side: return a placeholder for SSR
return { name, component, options };
}
if (!window.customElements) {
throw new Error('Custom Elements API not supported');
}
const observedAttrs = options.observedAttributes || [];
const defaults = options.defaults || {};
class CoherentElement extends HTMLElement {
static get observedAttributes() {
return observedAttrs;
}
constructor() {
super();
this._props = { ...defaults };
this._connected = false;
this.component = component;
this.options = options;
}
connectedCallback() {
this._connected = true;
// Copy initial attributes to props
for (const attr of observedAttrs) {
Iif (this.hasAttribute(attr)) {
this._props[attr] = this.getAttribute(attr);
}
}
this._render();
}
disconnectedCallback() {
this._connected = false;
// Cleanup: remove event listeners and clear content
Iif (options.shadow && this.shadowRoot) {
this.shadowRoot.innerHTML = '';
} else {
this.innerHTML = '';
}
}
attributeChangedCallback(attrName, oldValue, newValue) {
if (oldValue === newValue) return;
this._props[attrName] = newValue;
Eif (this._connected) {
this._render();
}
}
/**
* Set a property and re-render
*/
setProperty(key, value) {
this._props[key] = value;
Eif (this._connected) {
this._render();
}
}
/**
* Get current props
*/
getProperties() {
return { ...this._props };
}
_render() {
const componentDef = typeof this.component === 'function'
? this.component(this._props)
: this.component;
const html = render(componentDef);
Iif (this.options.shadow) {
if (!this.shadowRoot) {
this.attachShadow({ mode: 'open' });
}
this.shadowRoot.innerHTML = html;
this._delegateEvents(this.shadowRoot);
} else {
this.innerHTML = html;
this._delegateEvents(this);
}
}
/**
* Delegate data-action events to component handlers
*/
_delegateEvents(root) {
const actionElements = root.querySelectorAll('[data-action]');
for (const el of actionElements) {
const action = el.dataset.action;
const [eventType, handlerName] = action.includes(':')
? action.split(':')
: ['click', action];
el.addEventListener(eventType, (event) => {
this.dispatchEvent(new CustomEvent('coherent-action', {
bubbles: true,
detail: { action: handlerName, event, element: el }
}));
});
}
}
}
window.customElements.define(name, CoherentElement);
return CoherentElement;
}
/**
* Integration utilities for runtime environments
*/
export function integrateWithWebComponents(_runtime) {
return {
defineComponent: (name, component, options) => defineComponent(name, component, options)
};
}
/**
* Alias for defineComponent
*/
export function defineCoherentElement(name, component, options = {}) {
return defineComponent(name, component, options);
}
export { defineComponent as default };
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