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next.js/lib/app.js

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import React, { Component } from 'react'
import PropTypes from 'prop-types'
import shallowEquals from './shallow-equals'
import { execOnce, warn, loadGetInitialProps } from './utils'
import { makePublicRouterInstance } from './router'
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export default class App extends Component {
static displayName = 'App'
static async getInitialProps ({ Component, router, ctx }) {
const pageProps = await loadGetInitialProps(Component, ctx)
return {pageProps}
}
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static childContextTypes = {
_containerProps: PropTypes.any,
headManager: PropTypes.object,
router: PropTypes.object
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}
getChildContext () {
const { headManager } = this.props
return {
headManager,
router: makePublicRouterInstance(this.props.router),
_containerProps: {...this.props}
}
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}
componentDidCatch (err, info) {
// To provide clearer stacktraces in error-debug.js in development
// To provide clearer stacktraces in app.js in production
err.info = info
if (process.env.NODE_ENV === 'production') {
// In production we render _error.js
window.next.renderError({err})
} else {
// In development we throw the error up to AppContainer from react-hot-loader
throw err
}
}
render () {
const {router, Component, pageProps} = this.props
const url = createUrl(router)
return <Container>
<Component {...pageProps} url={url} />
</Container>
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}
}
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export class Container extends Component {
static contextTypes = {
_containerProps: PropTypes.any
}
componentDidMount () {
this.scrollToHash()
}
componentDidUpdate () {
this.scrollToHash()
}
scrollToHash () {
const { hash } = this.props
if (!hash) return
const el = document.getElementById(hash)
if (!el) return
// 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)
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}
render () {
const {children} = this.props
return <>{children}</>
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}
}
const warnUrl = execOnce(() => {
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if (process.env.NODE_ENV !== 'production') {
warn(`Warning: the 'url' property is deprecated. https://err.sh/next.js/url-deprecated`)
}
})
export function createUrl (router) {
return {
get query () {
warnUrl()
return router.query
},
get pathname () {
warnUrl()
return router.pathname
},
get asPath () {
warnUrl()
return router.asPath
},
back: () => {
warnUrl()
router.back()
},
push: (url, as) => {
warnUrl()
return router.push(url, as)
},
pushTo: (href, as) => {
warnUrl()
const pushRoute = as ? href : null
const pushUrl = as || href
return router.push(pushRoute, pushUrl)
},
replace: (url, as) => {
warnUrl()
return router.replace(url, as)
},
replaceTo: (href, as) => {
warnUrl()
const replaceRoute = as ? href : null
const replaceUrl = as || href
return router.replace(replaceRoute, replaceUrl)
}
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}
}