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import { h, Component as BaseComponent } from 'preact';
import render from 'preact-render-to-string';
import StaticHtml from './static-html.js';
const slotName = (str) => str.trim().replace(/[-_]([a-z])/g, (_, w) => w.toUpperCase());
function check(Component, props, children) {
if (typeof Component !== 'function') return false;
if (Component.prototype != null && typeof Component.prototype.render === 'function') {
return BaseComponent.isPrototypeOf(Component);
}
try {
const { html } = renderToStaticMarkup(Component, props, children);
if (typeof html !== 'string') {
return false;
}
// There are edge cases (SolidJS) where Preact *might* render a string,
// but components would be <undefined></undefined>
return !/\<undefined\>/.test(html);
} catch (err) {
return false;
}
}
function renderToStaticMarkup(Component, props, { default: children, ...slotted }) {
const slots = {};
for (const [key, value] of Object.entries(slotted)) {
const name = slotName(key);
slots[name] = h(StaticHtml, { value, name });
}
// Note: create newProps to avoid mutating `props` before they are serialized
const newProps = { ...props, ...slots };
const html = render(
h(Component, newProps, children != null ? h(StaticHtml, { value: children }) : children)
);
return { html };
}
export default {
check,
renderToStaticMarkup,
};
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