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I have an app where I configured server side rendering. Everything is working nice and my component is rendered on the server. The problem is that I get my component rendered twice on the screen. One comes from <div id="content"><%- content %></div>that I am using for server rendering and one comes from <script src="http://localhost:3001/bundle.js"></script>. I use webpack to make two bundles for my server and client. Why is this happening and how can I fix this?
views/index.ejs
<body>
<div id="app"></div>
<div id="content"><%- content %></div>
<script src="http://localhost:3001/bundle.js"></script>
</body>
index.js
app.use(Express.static(path.join(__dirname, '../', 'dist')))
app.use(serverRenderer)
app.get('*', (req: Object, res: Object) => {
res.render('index', {content: req.body})
})
serverRender
import React from 'react'
import ReactDOM from 'react-dom/server'
import { match, RouterContext } from 'react-router'
import routes from '../client/routes.js'
async function render (component) {
const content = ReactDOM.renderToString(component)
return content
}
async function getMatchParams (routes, currentUrl) {
return new Promise((resolve, reject) => {
match({routes: routes, location: currentUrl}, (err, redirect, props) => {
if (err) {
return reject(err)
}
return resolve(props)
})
})
}
export default async(req, res, next) => {
const renderProps = await getMatchParams(routes, req.url)
if (renderProps) {
const component = (
<RouterContext {...renderProps} />
)
req.body = await render(component)
next()
}
}
224
Ok. I have found a problem. I was referring to the bundle and server rendered string with two separate <div>. Inside my app.js I was doing this
render(
<Router history={browserHistory}>
{routes}
</Router>,
document.getElementById('app')
)
Thats why I should have been sending the string to the template like this.
app.use(Express.static(path.join(__dirname, '../', 'dist')))
app.use(serverRenderer)
app.get('*', (req: Object, res: Object) => {
res.render('index', {app: req.body})
})
And finally my views/index.js should look like this
<body>
<div id="app"><%- app %></div>
<script src="http://localhost:3001/bundle.js"></script>
</body>
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