83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
import React from 'react';
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import ReactDOM from 'react-dom/server.js';
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import StaticHtml from './static-html.js';
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const slotName = (str) => str.trim().replace(/[-_]([a-z])/g, (_, w) => w.toUpperCase());
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const reactTypeof = Symbol.for('react.element');
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function errorIsComingFromPreactComponent(err) {
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return (
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err.message &&
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(err.message.startsWith("Cannot read property '__H'") ||
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err.message.includes("(reading '__H')"))
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);
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}
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function check(Component, props, children) {
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// Note: there are packages that do some unholy things to create "components".
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// Checking the $$typeof property catches most of these patterns.
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if (typeof Component === 'object') {
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const $$typeof = Component['$$typeof'];
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return $$typeof && $$typeof.toString().slice('Symbol('.length).startsWith('react');
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}
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if (typeof Component !== 'function') return false;
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if (Component.prototype != null && typeof Component.prototype.render === 'function') {
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return React.Component.isPrototypeOf(Component) || React.PureComponent.isPrototypeOf(Component);
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}
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let error = null;
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let isReactComponent = false;
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function Tester(...args) {
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try {
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const vnode = Component(...args);
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if (vnode && vnode['$$typeof'] === reactTypeof) {
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isReactComponent = true;
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}
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} catch (err) {
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if (!errorIsComingFromPreactComponent(err)) {
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error = err;
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}
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}
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return React.createElement('div');
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}
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renderToStaticMarkup(Tester, props, children, {});
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if (error) {
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throw error;
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}
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return isReactComponent;
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}
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function renderToStaticMarkup(Component, props, { default: children, ...slotted }, metadata) {
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delete props['class'];
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const slots = {};
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for (const [key, value] of Object.entries(slotted)) {
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const name = slotName(key);
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slots[name] = React.createElement(StaticHtml, { value, name });
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}
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// Note: create newProps to avoid mutating `props` before they are serialized
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const newProps = {
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...props,
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...slots,
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};
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const newChildren = children ?? props.children;
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if (newChildren != null) {
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newProps.children = React.createElement(StaticHtml, { value: newChildren });
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}
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const vnode = React.createElement(Component, newProps);
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let html;
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if (metadata && metadata.hydrate) {
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html = ReactDOM.renderToString(vnode);
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} else {
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html = ReactDOM.renderToStaticMarkup(vnode);
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}
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return { html };
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}
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export default {
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check,
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renderToStaticMarkup,
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};
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