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import Router from '../router'
import { sendMessage } from './hot-reloader/pages/websocket'
export default async (page?: string) => {
// Never send pings when using Turbopack as it's not used.
// Pings were originally used to keep track of active routes in on-demand-entries with webpack.
if (process.env.TURBOPACK) {
return
}
if (page) {
// in AMP the router isn't initialized on the client and
// client-transitions don't occur so ping initial page
setInterval(() => {
sendMessage(JSON.stringify({ event: 'ping', page }))
}, 2500)
} else {
Router.ready(() => {
setInterval(() => {
// when notFound: true is returned we should use the notFoundPage
// as the Router.pathname will point to the 404 page but we want
// to ping the source page that returned notFound: true instead
const notFoundSrcPage = self.__NEXT_DATA__.notFoundSrcPage
const pathname =
(Router.pathname === '/404' || Router.pathname === '/_error') &&
notFoundSrcPage
? notFoundSrcPage
: Router.pathname
sendMessage(JSON.stringify({ event: 'ping', page: pathname }))
}, 2500)
})
}
}
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