file constant.js
import { LightningElement } from 'lwc';
import { createRecord } from 'lightning/uiRecordApi';
import { ShowToastEvent } from 'lightning/platformShowToastEvent';
import CONTACT_OBJECT from '#salesforce/schema/Contact';
import FIRSTNAME_FIELD from '#salesforce/schema/Contact.FirstName';
import LASTNAME_FIELD from '#salesforce/schema/Contact.LastName';
import EMAIL_FIELD from '#salesforce/schema/Contact.Email';
import PHONE_FIELD from '#salesforce/schema/Contact.Phone';
import FAX_FIELD from '#salesforce/schema/Contact.Fax';
file contact.js
export default class LdsCreateRecord extends LightningElement {
}
How can I include constant.js file in contact.js
for more clarification please visit this
Github
If you mean "How can I include contact.js file in constant.js" then it is simple:
import { LdsCreateRecord } from './contact.js';
If you mean what you said: "How can I include constant.js file in contact.js" then you must first export something from constant.js.
Related
Here is my index.jsx file:
import Navbar from './Navbar/Navbar';
import Greeting from './Greeting/Greeting'
import Project from './Project/Project';
import About from './About/About';
import Contact from './Contact/Contact';
import Footer from './Footer/Footer';
export default {
Navbar,
Greeting,
Project,
About,
Contact,
Footer,
};
And my App.jsx file:
import React from 'react';
import {Navbar} from './components';
// import Navbar from './components/Navbar/Navbar';
const App = () => {
return (
<div>
<Navbar />
</div>
)
}
export default App;
When I call to import Navbar through the index.jsx file, I got this error:
Uncaught SyntaxError: The requested module */sre/components/index. isx?
App.isx:4
t=1672200538218' does not provide an export named "Navbar'
What wrong I got if I call Navbar through index file? Thank you so much!
How can I call to import many components througnt index file.
Instead of importing them and then exporting them, you could directly export them as below. But for the above solution to work you should use named exports, like export function Navbar() { instead of
export default function Navbar() {.
export { Navbar } from "./Navbar/Navbar";
export { Greeting } from "./Greeting/Greeting";
export { Project } from "./Project/Project";
export { About } from "./About/About";
export { Contact } from "./Contact/Contact";
export { Footer } from "./Footer/Footer";
But if you would rather keep your default export, you should be doing as below instead of what you have (which I wouldn't prefer, as anyway a named export is way better):
export { defautl as Navbar } from "./Navbar/Navbar";
export { defautl as Greeting } from "./Greeting/Greeting";
export { defautl as Project } from "./Project/Project";
export { defautl as About } from "./About/About";
export { defautl as Contact } from "./Contact/Contact";
export { defautl as Footer } from "./Footer/Footer";
You can learn more about export on mdn.
It's possible to do a barrel in Vuejs?
If yes, please show a example, I search in the web, but i didn't find anything
Like js
// app/domain/index.js
export * from './negotiation';
export * from './negotiations';
// app/app.js
import { Negotiation, Negotiations } from './domain';
You can do
export {default as MyModule} from './MyModule.vue';
When I barrel .vue files I do it this way:
Creating the barrel
//index.js
import File1 from './file1'
import File1 from './file1'
export {
File1,
File2
}
Using the barrel file
import { File1, File2 } from './path'
Probably, this will work:
// app/domain/index.js
import NegotiationModule from './negotiation';
import NegotiationsModule from './negotiations';
export const Negotiation = NegotiationModule;
export const Negotiations = NegotiationsModule;
// app/app.js
import { Negotiation, Negotiations } from './domain';
(I haven't tested it, so it could not work)
Create index.js file in the same folder as the components (negotiation, negotiations)
app/domain/index.js
import negotiation from './negotiation.vue'
import negotiations from './negotiations.vue'
export default { negotiation, negotiations };
app/app.js
import domains from './domain';
const { negotiation, negotiations } = domains;
export default {
components: { negotiation, negotiations }
}
I can't get this react class to export and I can't figure out why. I have the export class at the bottom and everything is extending what it should. Is it my withRouter method?
import React, {Component} from 'react';
import {HeaderAdmin} from '../headerAdmin';
import {DashBoxes} from './dashBoxes';
import {MetaData} from '../metaData';
import {withRouter} from 'react-router-dom';
class CoachDashMain extends Component {
render() {
return(
<div>
<HeaderAdmin />
<DashBoxes />
<MetaData />
</div>
);
}
}
export default withRouter(CoachDashMain);
the error I'm getting is ./components/Coach/coachDashMain' does not contain an export named 'CoachDashMain'.
the import in another file looks like:
import {CoachDashMain} from './components/Coach/coachDashMain'
You are using named imports: import { CoachDashMain } from '...', which gives the above error unless you have export class CoachDashMain ... in that file.
Since you are using export default ..., you should import it by:
import CoachDashMain from '...'; // `CoachDashMain` can be renamed to anything
When you default export the class, you don't need the curly braces while importing that class in another file.
So, you should import like:
import CoachDashMain from './components/Coach/coachDashMain';
"Element type is invalid" I still keep getting this error and don't know what to do. Tried <form> and <Form> still same. Please help:
This is my AzForm.js saved at: "./components/testComponent"
import React from 'react'
import { Provider } from 'react-redux'
import { Container, Content, Text, Form } from 'native-base';
//import { createStore } from 'redux' //NOT sure whether I need it, but I still get the same error
import { reduxForm } from 'redux-form'
const SignInForm = props => {
return (
<Form>
</Form>
);
};
export default reduxForm({
form: 'simple' // a unique identifier for this form
})(SignInForm)
and this is an extract from index.js
import React, { Component } from 'react';
import { AppRegistry, StyleSheet, Image } from 'react-native';
import { SignInForm } from "./components/AzForm";
export class HomeScreen extends Component {
render() {
return (
<SignInForm />
);
}
}
Change
export class HomeScreen
to
export default class HomeScreen`
When you export without the default, the component that is exported becomes what is known as a named export (you can have many of these per file). You would import these as import {HomeScreen} from 'HomeScreen'
The React convention is to one component per file. This is achieved by using the export default option as provided above. You would then import it using import HomeScreen from 'HomeScreen';
This component does work:
export class Template extends React.Component {
render() {
return (
<div> component </div>
);
}
};
export default Template;
If i remove last row, it doesn't work.
Uncaught TypeError: Cannot read property 'toUpperCase' of undefined
I guess, I don't understand something in es6 syntax. Isn't it have to export without sign "default"?
Exporting without default means it's a "named export". You can have multiple named exports in a single file. So if you do this,
class Template {}
class AnotherTemplate {}
export { Template, AnotherTemplate }
then you have to import these exports using their exact names. So to use these components in another file you'd have to do,
import {Template, AnotherTemplate} from './components/templates'
Alternatively if you export as the default export like this,
export default class Template {}
Then in another file you import the default export without using the {}, like this,
import Template from './components/templates'
There can only be one default export per file. In React it's a convention to export one component from a file, and to export it is as the default export.
You're free to rename the default export as you import it,
import TheTemplate from './components/templates'
And you can import default and named exports at the same time,
import Template,{AnotherTemplate} from './components/templates'
Add { } while importing and exporting:
export { ... }; |
import { ... } from './Template';
export → import { ... } from './Template'
export default → import ... from './Template'
Here is a working example:
// ExportExample.js
import React from "react";
function DefaultExport() {
return "This is the default export";
}
function Export1() {
return "Export without default 1";
}
function Export2() {
return "Export without default 2";
}
export default DefaultExport;
export { Export1, Export2 };
// App.js
import React from "react";
import DefaultExport, { Export1, Export2 } from "./ExportExample";
export default function App() {
return (
<>
<strong>
<DefaultExport />
</strong>
<br />
<Export1 />
<br />
<Export2 />
</>
);
}
⚡️Working sandbox to play around: https://codesandbox.io/s/export-import-example-react-jl839?fontsize=14&hidenavigation=1&theme=dark
// imports
// ex. importing a single named export
import { MyComponent } from "./MyComponent";
// ex. importing multiple named exports
import { MyComponent, MyComponent2 } from "./MyComponent";
// ex. giving a named import a different name by using "as":
import { MyComponent2 as MyNewComponent } from "./MyComponent";
// exports from ./MyComponent.js file
export const MyComponent = () => {}
export const MyComponent2 = () => {}
import * as MainComponents from "./MyComponent";
// use MainComponents.MyComponent and MainComponents.MyComponent2
//here
EXPORTING OBJECT:
class EmployeeService { }
export default new EmployeeService()
import EmployeeService from "../services/EmployeeService"; // default import
EXPORTING ARRAY
export const arrExport = [
['first', 'First'],
['second', 'Second'],
['third', 'Third'],
]
import {arrExport} from './Message' //named import
// if not react and javascript app then mention .js extension in the import statement.
You can export only one default component and in import can change the name without aliasing it(using as).