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next.js/lib/app.js
Arunoda Susiripala 97c472c0c8 Handle pages with no default export and show an error. (#1484)
That error is meaningful and easy to find the issue.
2017-03-23 09:40:22 +05:30

103 lines
2.9 KiB
JavaScript

import React, { Component, PropTypes } from 'react'
import { AppContainer } from 'react-hot-loader'
import shallowEquals from './shallow-equals'
import { warn } from './utils'
const ErrorDebug = process.env.NODE_ENV === 'production'
? null : require('./error-debug').default
export default class App extends Component {
static childContextTypes = {
headManager: PropTypes.object
}
getChildContext () {
const { headManager } = this.props
return { headManager }
}
render () {
const { Component, props, hash, err, router } = this.props
const url = createUrl(router)
// If there no component exported we can't proceed.
// We'll tackle that here.
if (typeof Component !== 'function') {
throw new Error(`The default export is not a React Component in page: "${url.pathname}"`)
}
const containerProps = { Component, props, hash, router, url }
return <div>
<Container {...containerProps} />
{ErrorDebug && err ? <ErrorDebug error={err} /> : null}
</div>
}
}
class Container extends Component {
componentDidMount () {
this.scrollToHash()
}
componentDidUpdate () {
this.scrollToHash()
}
scrollToHash () {
const { hash } = this.props
const el = document.getElementById(hash)
if (el) {
// If we call scrollIntoView() in here without a setTimeout
// it won't scroll properly.
setTimeout(() => el.scrollIntoView(), 0)
}
}
shouldComponentUpdate (nextProps) {
// need this check not to rerender component which has already thrown an error
return !shallowEquals(this.props, nextProps)
}
render () {
const { Component, props, url } = this.props
// includes AppContainer which bypasses shouldComponentUpdate method
// https://github.com/gaearon/react-hot-loader/issues/442
return <AppContainer errorReporter={ErrorDebug}>
<Component {...props} url={url} />
</AppContainer>
}
}
function createUrl (router) {
return {
query: router.query,
pathname: router.pathname,
back: () => {
warn(`Warning: 'url.back()' is deprecated. Use "window.history.back()"`)
router.back()
},
push: (url, as) => {
warn(`Warning: 'url.push()' is deprecated. Use "next/router" APIs.`)
return router.push(url, as)
},
pushTo: (href, as) => {
warn(`Warning: 'url.pushTo()' is deprecated. Use "next/router" APIs.`)
const pushRoute = as ? href : null
const pushUrl = as || href
return router.push(pushRoute, pushUrl)
},
replace: (url, as) => {
warn(`Warning: 'url.replace()' is deprecated. Use "next/router" APIs.`)
return router.replace(url, as)
},
replaceTo: (href, as) => {
warn(`Warning: 'url.replaceTo()' is deprecated. Use "next/router" APIs.`)
const replaceRoute = as ? href : null
const replaceUrl = as || href
return router.replace(replaceRoute, replaceUrl)
}
}
}