24 lines
975 B
JavaScript
24 lines
975 B
JavaScript
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// The isomorphic entry contract (plan decision D5): the entry module's
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// default export is either a choo app instance (typically
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// `export default app.mount('body')` — mount() on the server records the
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// selector and returns the app) or a factory returning one (preferred:
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// fresh state per request). One module, three consumers: browser mount,
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// server render, build metadata.
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export function resolveApp (mod, entry) {
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const value = mod && mod.default
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if (!value) {
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throw new Error(`bankai: ${entry} has no default export — export your choo app (or a function returning one)`)
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}
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// a factory is a plain function; an app instance has .mount
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const app = typeof value === 'function' && !value.mount ? value() : value
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if (typeof app.toStream !== 'function') {
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throw new Error(`bankai: the default export of ${entry} is not a choo v8 app (missing toStream)`)
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}
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return app
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}
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export function selectorOf (app) {
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return app.selector || 'body'
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}
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