7e7f2c0a6d
* Move client-side dev JS to dev folder * Move eventsource polyfill * Move source-map-support * Move error boundary * Deprecate Container in _app * Make initialRender check better * Remove unused code * Only support one subscription as there is only one * Don’t spread object * Shorten property name * Add container in development too * Simplify query update logic
91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
/* globals __webpack_hash__ */
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import fetch from 'unfetch'
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import EventSourcePolyfill from './event-source-polyfill'
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import { getEventSourceWrapper } from './error-overlay/eventsource'
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import { setupPing } from './on-demand-entries-utils'
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if (!window.EventSource) {
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window.EventSource = EventSourcePolyfill
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}
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const data = JSON.parse(document.getElementById('__NEXT_DATA__').textContent)
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let { assetPrefix, page } = data
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assetPrefix = assetPrefix || ''
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let mostRecentHash = null
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/* eslint-disable-next-line */
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let curHash = __webpack_hash__
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const hotUpdatePath =
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assetPrefix + (assetPrefix.endsWith('/') ? '' : '/') + '_next/static/webpack/'
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// Is there a newer version of this code available?
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function isUpdateAvailable () {
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// __webpack_hash__ is the hash of the current compilation.
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// It's a global variable injected by Webpack.
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/* eslint-disable-next-line */
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return mostRecentHash !== __webpack_hash__
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}
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// Webpack disallows updates in other states.
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function canApplyUpdates () {
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return module.hot.status() === 'idle'
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}
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// This function reads code updates on the fly and hard
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// reloads the page when it has changed.
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async function tryApplyUpdates () {
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if (!isUpdateAvailable() || !canApplyUpdates()) {
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return
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}
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try {
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const res = await fetch(`${hotUpdatePath}${curHash}.hot-update.json`)
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const data = await res.json()
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const curPage = page === '/' ? 'index' : page
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const pageUpdated = Object.keys(data.c).some(mod => {
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return (
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mod.indexOf(
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`pages${curPage.substr(0, 1) === '/' ? curPage : `/${curPage}`}`
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) !== -1 ||
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mod.indexOf(
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`pages${
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curPage.substr(0, 1) === '/' ? curPage : `/${curPage}`
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}`.replace(/\//g, '\\')
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) !== -1
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)
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})
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if (pageUpdated) {
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document.location.reload(true)
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} else {
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curHash = mostRecentHash
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}
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} catch (err) {
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console.error('Error occurred checking for update', err)
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document.location.reload(true)
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}
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}
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getEventSourceWrapper({
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path: `${assetPrefix}/_next/webpack-hmr`
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}).addMessageListener(event => {
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if (event.data === '\uD83D\uDC93') {
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return
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}
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try {
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const message = JSON.parse(event.data)
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if (message.action === 'sync' || message.action === 'built') {
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if (!message.hash) {
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return
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}
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mostRecentHash = message.hash
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tryApplyUpdates()
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} else if (message.action === 'reloadPage') {
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document.location.reload(true)
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}
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} catch (ex) {
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console.warn('Invalid HMR message: ' + event.data + '\n' + ex)
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}
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})
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setupPing(assetPrefix, () => page)
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