I created a updatesite.nsf from updatesite.ntf template and trying to import a feature and I get an error says "LS2J Error: Java constructor failed to execute in (#304)..." And a long message. Notes and Domino are 12.0.02 both 64 bit...Need help in this . Why am I getting this error ? Nothing in Activity logs either in the updatesite.nsf.
The developer tried to create a JAR and trying to import it the Feature into the updatesite,nsf database and it errors out as above. It should import as I am expecting.
Beginner question here. I need to implement matter.js into a project built within a module. When I try a simple import like this:
import "./matter.js";
I get following error:
Uncaught TypeError: Cannot set property 'Matter' of undefined
at webpackUniversalModuleDefinition (VM609 matter.js:36)
at VM609 matter.js:37
What is the proper way to do this? Sorry if this is a newbie question. Just can't find the answer anywhere.
Replace line 37 in the matter.js file with
})(this || window, function() {
instead of
})(this, function() {
and then just say
import './matter.js';
Matter.whatever;
Seems to work for me at least!
I am receiving this warning message in my chrome console for my react-native project. Do you have any idea why I am getting this?
This is the complete message:
Require cycle: node_modules/react-native-radio-buttons/lib/index.js ->
node_modules/react-native-radio-buttons/lib/segmented-controls.js ->
node_modules/react-native-radio-buttons/lib/index.js
Require cycles are allowed, but can result in uninitialized values.
Consider refactoring to remove the need for a cycle.
I appreciate any suggestions.
Thanks
TL;DR: You import module A into module B and module B into module A resulting in a cycle A → B → A → B → A ..., which can result in errors. Resolve that by restructuring your modules, so that the cycle breaks.
Detailed Answer
In javascript if you import different modules into other modules all this importing generates a dependency tree:
root_module
┌───────────┴───────────┐
sub_module_A sub_module_B
┌────────┴────────┐
sub_module_C sub_module_D
When you run your code, all modules will be evaluated from bottom to top or from leaves to the trunk, so that for example if you import modules C and D into module B all exports of C and D are already evaluated and not undefined anymore. If module B would be evaluated before C and D, module B would be not working, because all exports from C and D would be undefined, since they have not been evaluated yet.
Still, it can be possible to form cycles in your dependency tree (this is what you got a warning for):
root_module
┌───────────┴───────────┐
sub_module_A sub_module_B
↑ ↓
sub_module_C
Problem: Let's say the evaluation starts now with module C. Since it imports something from module B and it has not been evaluated yet, module C is not working correctly. All imported stuff from B is undefined. This actually is not that bad, since in the end module C is evaluated once again when everything else has been evaluated, so that also C is working. The same goes if evaluation starts with module B.
BUT: If your code relies on a working module C from the very beginning, this will result in very hard to find errors. Therefore you get this error.
How to solve: In your case the warning also gives a detailed explanation, where the cycle emerges. You import native-radio-buttons/lib/segmented-controls.js in node_modules/react-native-radio-buttons/lib/index.js and node_modules/react-native-radio-buttons/lib/index.js in native-radio-buttons/lib/segmented-controls.js. It seems like the cycle is placed inside some of your node modules. In this case there is unfortunately no way you could solve that by yourself.
If the cycle is in your own code, you have to extract some exports into a third module / file, from which you import the code into both modules previously forming the cycle.
You are probably importing something from "file A" into "file B", then importing something again from "file B" into "file A" .
Examine all the imports from both the files and see if there's any such cycle.
To prevent from having to write multiple lines of
import SomeComponent from "../components"
import AnotherComponent from "../components"
import AndAnotherComponent from "../components"
import AndOneMoreComponent from "../components"
I created a comp.js file where I could import the components as they are created and export them as modules.
All components are then able to be reached from one place.
So you can then have something like this in some place...
import { SomeComponent, AnotherComponent, AndAnotherComponent, AndOneMoreComponent} from './comp'
Now what happens in the renderer for example when SomeComponent is rendered....
import * as React from "react";
import { AnotherComponent} from '../comps';
import { View, Text } from "react-native";
function SomeComponent() {
return (
<>
<AnotherComponent />
<View><Text>EXAMPLE OF SOMECOMPONENT</Text></View>
</>
)
}
export default SomeComponent;
In the example, SomeComponent could be called in the main App, and when it renders it also asks for a component from the comp.js
This is what triggers the Require cycle warning because a module that was imported from one place, is then rendering and asking to import another module from the same place it was rendered from.
What are your thoughts on this, should I revert back to using single import statements or do you think there is a danger in using the module export as it is currently setup?
I my case, I have sold the same problem in react-native navgiation.
What I did ?
Already I was using react-navigation like below
export const containerRef = createRef();
function App(){
return (
<NavigationContainer ref={containerRef}>
....
<NavigationContainer>
);
}
and then I was consuming it like:
import {containerRef} from 'filename';
onPress = ()=> containerRef.current.navigate('Chat');
But I updated like below and warning has gone.
function App(){
return (
<NavigationContainer> // removed ref
....
<NavigationContainer>
);
}
and then I was consuming it like:
import { useNavigation } from '#react-navigation/native';
onPress = ()=> useNavigation.navigate('Chat');
This occurs if your code contains cyclic dependencies. If these dependencies exist within your own libraries, you can easily fix them. But if this is happening in 3rd party libraries, you can't do much except waiting for the developers to fix these.
Another reason might be this: Some imports cause this warning if they're done through the require keyword. Replace these with import statements and you might be good to go. For example,
const abc = require("example"); // Don't use this syntax
import abc from "example" // Use this syntax instead
NOTE: This might vary from project to project. For a detailed understanding of require vs import, refer to this link.
In my case the warning was like this;
Require cycle: src\views\TeamVerification.js -> src\components\TeamVerificationListItem.js ->
src\views\TeamVerification.js Require cycles are allowed, but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
As it indicates, TeamVerification was importing TeamVerificationListItem and TeamVerificationListItem was also importing TeamVerification. It was an unused import but after I remove it the warning gone.
As others have already mentioned, for your own packages
Move things required within two modules by each other into a third module
Avoid imports from barrel-files (index.ts/js) or aliases (#mycompany/my-module) if you are within the same "my-module"
What others have not mentioned (and which seems to be the problem for OP), for packages not within your responsibility (eg node_modules from NPM), the only thing you can do is
Disable the warning. It will still show up in metro console, but no more yellow warning snackbar: import { LogBox } from 'react-native'; LogBox.ignoreLogs(['Require cycle: node_modules/']); You can place the code in App.tsx, for example.
Modify the package contents of the node_modules itself and patch the package contents after every npm install via patch-package => I think this is an overkill if the circular imports don't produce actual errors
You should use the Relation wrapper type in relation properties in ES Modules projects to avoid circular dependency issues, just click here: https://typeorm.io/#relations-in-esm-projects
In my case, i had the same warning after the installation of a 'package'
and in their documentation, it was import SomeFunc from 'package'
and instantly the warning showed up
Require cycles are allowed but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
but as soon as I destructure the SomeFunc there was no more warning
import {SomeFunc} from 'package'
please look at the destructuring
I used react-native-maps in my project and I got the same error.
Just upgraded from 0.27.1 -> 0.28.0.
I can confirm that this issue is fixed.
Thank you
if use NavigationContainer in #react-navigation/native
import {createRef} from 'react';
<NavigationContainer ref={createRef()}>
Please check whether you have imported same details within that file.
(i.e)
your file being as a actions/meals.js and you have added the line in the same file like
import { Something } from './actions/meals.js'
RN version: 0.50
Testing on Android, haven't tested on iOS
I am trying to use ErrorUtils.setGlobalHandler as described in this github issue: https://github.com/facebook/react-native/issues/1194
However, what is not clear from the issue is how to import ErrorUtils. It's not in the react documentation: https://facebook.github.io/react-native/docs/0.50/getting-started.html
Previously, in RN 0.41, I was able to import ErrorUtils with import ErrorUtils from "ErrorUtils"; However, in 0.50 I am getting a red react popup with the following message when I try to import ErrorUtils like this:
com.facebook.react.common.JavascriptException: Failed to execute 'importScripts' on 'WorkerGlobalScope': The script at 'http://localhost:8081/index.bundle?platform=android&dev=true&minify=false' failed to load.
I've also tried import { ErrorUtils } from 'react-native'; but it doesn't seem to exist there. The error is:
Cannot read property 'setGlobalHandler' of undefined
How do I properly import ErrorUtils in RN 0.50?
ErrorUtils is a global variable, therfore it doesn't need to be imported. You can verify this with console.log(global.ErrorUtils)
However it is exported as module anyways (here). The comment there also has more information why it is done this way.
You can import the module like this:
import ErrorUtils from 'ErrorUtils';
For anyone on RN61+, you should no longer import the module as you will experience the following error in the running metro bundler:
Error: Unable to resolve module `ErrorUtils`
Instead, just use the module without importing as this is a global variable, as stated by leo
I did created a global.d.ts to define a global variable,
interface Global {
ErrorUtils: {
setGlobalHandler: any
reportFatalError: any
getGlobalHandler: any
}
}
declare var global: Global
then, at where you are trying to use it, simply
global.ErrorUtils.setGlobalHandler(xxxx)
I was trying to define:
.*(s1::String, s2::String) = string(s1,s2)
and got an error: function Base..* must be explicitly imported, so I did:
import Base..*
but got another error: invalid operator "..*".
How should I import this operator?
You can do
import Base.(.*)
What is the use case?