I need to convert this line to next.js dynamic import and also without SSR
import { widget } from "./charting_library/charting_library";
I have tried this one
const widget = dynamic(() => import("./charting_library/charting_library").then((mod) => mod.widget), {
ssr: false
});
This seems not the correct way and also charting_libray.js file is a compiled js file in a previous project.
Is the problem is my importing method or the js file? If this is importing method how do I fix this?
const { widget } = await import("./charting_library/charting_library")
Maybe something along those lines might work? As for the SSR side I am not sure if you would need to execute it within a useEffect.
Related
It was my understanding that if I was to dynamically import the only components that use a third-party library, then that library wouldn't be included in the 'First Load Bundle' shipped out to the client.
I am using Recharts in the following two components (this is the only place it's imported in the app), and I am then importing those components into the parent component like this:
const UvGraphTile = dynamic(() => import("#/components/tiles/UvGraphTile"), {
ssr: false,
});
const StravaGraphTile = dynamic(() => import("#/components/tiles/StravaGraphTile"),
{
ssr: false,
}
);
However Recharts still appears in the 'First Load Bundle', as seen in the screen shot provided. I don't know if I am making a mistake, or if my interpretation of the dynamic import for NextJS is incorrect.
Any help would be greatly appreciated! :)
I am trying to lazy load constant file in react. This constant file is not react component just simple javascript files like below :
// constant.js
export const customFunction = () => {
}
// component.js
const {
customFunction,
} = React.lazy(() => import('./constant.js'));
This I am not able to find in browser under developer tools source option. Also due to this getting customFunction undefined error. This code work if do normal import. customFunction using under useEffect()
import {
customFunction
} from './constant.js';
Do not wrap import statement inside React.lazy. Instead only use import() which returns a Promise and it gets resolved to the contents of the mentioned file
Here is a working example
I'm trying to use dynamic import for importing a different modules depending on the props passed to the component. Paths to the components are kept in an object
const components = {
'apple': './Apple.js',
'orange': './Orange.js',
// ...
}
Then
// ...
import(components[this.props.type])
// ...
Unfortunately, I get the following error:
Unhandled Rejection (Error): Cannot find module './Apple.js'
It disappears when I explicitly specify the filename (import('./Apple.js')). Is it possible to force nextjs to serve these dynamic modules?
You need to use the dynamic utility from next/dynamic for dynamic import in Next.js. This function is inspired by react-loadable library and uses similar syntax.
The simplest way to dynamically import React component in Next.js is:
const DynamicComponent1 = dynamic(import('../components/hello1'))
If you want to import module that is not a React component than you need to use customizing rendering feature:
const DynamicDeliveryOptions = dynamic({
loader: () => import('../components/delivery-options'),
render(props, loaded) {
const options = loaded.deliveryOptions.map(
option => <option key={option.id}>{option.title}</option>
);
return <select>{options}</select>
},
});
Notice that signature of the render function in Next.js is different from
its signature in react-loadable library (props is the first argument in Next.js).
Returning to your example: I think the best way to import multiple modules will be to declare them all as dynamic modules and conditionally render depending on the passed props (modules won't be loaded before render).
You can tell webpack to put a dynamically named module inside a particular chunk using this syntax:
const module = await import(
/* webpackChunkName: "your_custom_chunk_name" */
"path/to/your/module"
);
Webpack will extract your module's code inside the file: /.next/server/chunks/your_custom_chunk_name.js.
(Tested on NextJs version 12.1.6)
I know this question has been asked multiple times before but none of the solution seems to work.
I'm trying to use the library 'react-chat-popup' which only renders on client side in a SSR app.(built using next.js framework) The normal way to use this library is to call import {Chat} from 'react-chat-popup' and then render it directly as <Chat/>.
The solution I have found for SSR apps is to check if typedef of window !=== 'undefined' in the componentDidMount method before dynamically importing the library as importing the library normally alone would already cause the window is not defined error. So I found the link https://github.com/zeit/next.js/issues/2940 which suggested the following:
Chat = dynamic(import('react-chat-popup').then(m => {
const {Foo} = m;
Foo.__webpackChunkName = m.__webpackChunkName;
return Foo;
}));
However, my foo object becomes null when I do this. When I print out the m object in the callback, i get {"__webpackChunkName":"react_chat_popup_6445a148970fe64a2d707d15c41abb03"} How do I properly import the library and start using the <Chat/> element in this case?
Next js now has its own way of doing dynamic imports with no SSR.
import dynamic from 'next/dynamic'
const DynamicComponentWithNoSSR = dynamic(
() => import('../components/hello3'),
{ ssr: false }
)
Here is the link of their docs: next js
I've managed to resolve this by first declaring a variable at the top:
let Chat = ''
then doing the import this way in componentDidMount:
async componentDidMount(){
let result = await import('react-chat-popup')
Chat = result.Chat
this.setState({
appIsMounted: true
})
}
and finally render it like this:
<NoSSR>
{this.state.appIsMounted? <Chat/> : null}
</NoSSR>
You may not always want to include a module on server-side. For
example, when the module includes a library that only works in the
browser.
Import the library normally in child component and import that component dynamically on parent component.
https://nextjs.org/docs/advanced-features/dynamic-import#with-no-ssr
This approach worked for me.
I am (very) new to React and have been given the task of adding some data to a component that's being brought in from another file. This file spits out some JSON and I want to access certain pieces of data from it, for example:
config.forms.enquiry.title
I am importing the file fine - no problems there. But I am not sure how to include config into my props.
I found a working example, in another file, and have copied what it does. My code is as such
Brings in file with JSON:
import { withSettings } from 'services/settingsFile';
Add config in render function:
render () {
const styles = getStyles(this.props, this.context, this.state);
const { config } = this.props;
// other stuff
Add to propTypes:
enquiryForm.propTypes = {
config: PropTypes.object.isRequired,
// other stuff
Add to compose:
export const enquiryForm = compose(
withSettings,
// other stuff
However, I get the error:
Failed context type: The context config is marked as required in
n, but its value is undefined.
And from here I am not sure what to do. I know it's a tough question, but I know very little about React and have been thrown in the deep end.
Would anyone know what/where I should be searching for to fix this?
If you can import it like,
import { withSettings } from 'services/settingsFile';
why dont you use it like,
const { config } = withSettings;
OK, so the issue was that there was no wrapping element setting config as am attribute.
I had to go up a level to where my component was being brought in and wrap:
<SettingsFile config={window.settingsFile}>
around:
<Component conf={config} />
Then, the component I was working on was able to read config.