I followed the laravel-mix documentation to reduce the size of my vue application by using the extract(['vue]) method, it works well, however when i try using async components it won't work properly.
i already added babel to enable the promise syntax
mix.js('resources/js/app.js', 'public/js').version().extract(['vue'])
{
"presets": ["#babel/preset-env"],
"plugins": ["#babel/plugin-syntax-dynamic-import"]
}
i'm hoping there is something i am missing here and its not a actual bug that i will have to wait for a patch, has anyone seen this issue before?
I just red this:
Warning: you can’t currently combine mix.extract() and async components. According to Laravel Mix this will be fixed when Webpack 5 gets released.
source: https://medium.com/maatwebsite/reducing-vue-application-file-size-with-laravel-mix-e483f746d836
Related
I've gone through the 3 main causes of the infamous invalid hook call warning, and have determined that I have multiple versions of React in my app. I've confirmed this by this step:
// Add this in node_modules/react-dom/index.js
window.React1 = require('react');
// Add this in your component file
require('react-dom');
window.React2 = require('react');
console.log(window.React1 === window.React2);
Based on my research, I understand that it is probably a dependency I have that is listing react as a dependency instead of a peer dependency, and that there are a few ways to solve this problem. However, I don't know how to figure out which package it is that is causing the issue.
There are lots of solutions online that are relevant to react (such as adding a webpack alias), but unfortunately are not for react-native. I have (perhaps naively) tried to add an alias with module-resolver to babel.config.js, but that did not work:
plugins: [
[
'module-resolver',
{
alias: path.resolve('node_modules/react'),
},
],
]
Figured this out after a long while. The issue was having react-dom library listed as a dependency. I'd read somewhere to do this to support jest testing, but I suppose that advice was dated.
Nonetheless the error was an obvious red herring, so hoping this can help someone out in the future
unfortunately, my most recent application is required to support Internet Explorer 11. This requirement came somewhat suprising to me, so I already built the applications frontend with Vue.js. The backend is written in Laravel, therefore I use laravel-mix/webpack.
This is my app.js:
require('./bootstrap');
window.Vue = require('vue');
Obviously, IE11 doesn't support Vue.js so I tried the following ways of transpiling/polyfilling the code.
1. requiring polyfill
Approach: Adding require("#babel/polyfill"); to the top of my app.js as described in https://babeljs.io/docs/en/babel-polyfill
Result: Following Error Message shown in IE console:
SCRIPT1003: ':' expected
Clearly a compatibility issue, since pre data(){} is invalid in ES < 5
2. using mix.babel
Approach: Adding mix.babel(['resources/js/app.js'], 'resources/js/app.js') to my webpack.mix.js as described in https://laravel.com/docs/5.8/mix (I am using laravel 5.8.36). My webpack.mix.js now looks like this:
const mix = require('laravel-mix');
mix.js('resources/js/app.js', 'public/js/app.js')
mix.babel(['resources/js/app.js'], 'resources/js/app.js')
mix.sass('resources/sass/app.scss', 'public/css');
Result: Same Error Message as in 1
3. using an mix extension
Approach: Installing this extension: https://laravel-mix.com/extensions/polyfill and configure my webpack.mix.js as described. My webpack.mix.js now looks like this:
const mix = require('laravel-mix');
require('laravel-mix-polyfill');
mix.js('resources/js/app.js', 'public/js/app.js')
mix.sass('resources/sass/app.scss', 'public/css');
mix.polyfill({
enabled: true,
useBuiltIns: "usage",
targets: {"firefox": "50", "ie": "11"}
})
Result: Again, the same Error Message as in 1
4. manually transpiling with babel-cli
Approach: Merely out of desperation I tried to manually transpile my app.js with the following command ./node_modules/.bin/babel ./public/js/app.js --out-dir ./public/js/
Result: Stil no luck, same error as in 1
I am really starting to get frustrated, so any help is much appreciated.
If you can't get Babel-Polyfill to work, you could try using Polyfill.io, which automatically polyfills the selected Polyfills if the browser requires them.
All you need to do is go the Create a polyfill bundle page, and select the polyfills you need. Then once you've made your bundle, copy the URL at the top and add a <script> tag with said URL to your head.
I personally haven't used it with Laravel, but I've previously fought with babel-polyfill myself, and ended up using Polyfill.io since i couldn't get babel-polyfill to work.
After using #react-native-community/async-storage and transpile it with the following npm command in my react-native environment.
"test": "NODE_ENV=test ./node_modules/.bin/mocha --timeout 5000 --require #babel/register \"./src/shared/__tests__/**/*.spec.js\""
I did some research and in no vain. But I found it happens to Jest too.
jest test fails after installing react-native-async-storage
this is my babel.config.js
module.exports = {
env: {
production: {
},
test: {
presets: [
'#babel/preset-env'
],
},
},
};
I'm only testing non-jsx code only so #babel/preset-env seems to be working alright.
node_modules/#react-native-community/async-storage/lib/index.js:5
import AsyncStorage from './AsyncStorage';
^^^^^^^^^^^^
SyntaxError: Unexpected identifier
It seems like no one likes to answer jest newbie questions....
anyway, when starting to learn jest, I encountered some funny error messages that doesn't reflect the actual error. There are some possible situations a developer can consider.
You didn't to mock your module say A_module that is inside node_modules so one of the modules say B_modules inside A_modules uses a NativeModules from react so Jest cannot performa a test. Please look at stack trace or use a debugger to find out which one you prefer to mock.
Mock a module that uses NativeModules (similar to point 1, but more direct and concise )
You need to understand jest more thoroughly before you proceed. Reading documentation is good but jump to example when you think fit. especially check out the examples that you really need and read related ones. Many of the time, either your Babel setting or mocking methods is incorrect.
use jest.mock instead of jest.genMockFromModule. Why? there are some functions or init function that causes your test to crash at this statement. Because it calls NativeModules or something jest doesn't allow. use mock instead.
Solutions to this question: please refer to this most updated solution.
thanks
Basically my issue is that I get an error message, "__DEV__ is not defined" when I run jest. So I have read stackoverflow and other google posts on this. Some have suggested removing my .babelrc, but I actually need that file. Others have suggested adding
"globals": {
"__DEV__": true
}
To my package.json. I did that as well. I even deleted my node modules folder and re-installed. What should I do? Odd thing is that it was working before, but not now.
You can create a jest.config.json file in the root of your react-native project and add this globally as such
{
"jest": {
"globals": {
"__DEV__": true
}
}
}
Just add globals.DEV = true to your test file or set it in globals part of your jest settings
I got this when I was running Detox E2E tests inside of my react native app. Then use to work just fine but then I upgraded my mac OS and xcode and they started throwing Reference error DEV is not defined. Not sure why it was fine before and then broke after that.
My issue was fixed when I removed any code that was being imported from my react native app inside of the detox E2E tests. So the issue was importing any javascript from my app/ folder. I had a simple utility log function that wraps console.log which was the culprit. I did not need to modify any jest configs.
For anyone facing this issue I updated my jest by running in the terminal npm update jest this solved the issue for me.
I upgraded my app from react-native 0.15 to 0.16 but after that I'm getting an error and I don't know how to solve it.
TypeError:undefined is not an object (evaluating 'GLOBAL.Text={
get defaultProps(){
throw getInvalidGlobalUseError('Text')}}')
In Chrome Debugger:
Uncaught Error: Uncaught TypeError: Cannot set property 'Text' of undefined
Thanks
OBS: I'm running on Android.
I notice that changing app name solves the problem, I'm using Evently as app name today. I tried to recreate my virtual machine but didn't solve it.
In my case, I was able to narrow the cause down to one item in my .babelrc file:
{
"presets": ["es2015"]
}
As soon as I removed that and restarted the packager (making sure to also use the --reset-cache flag), I stopped getting the error.
Update 2:
It looks like React Native is making some changes to their .babelrc in version 0.20.0. So, if you are using that version or newer, you should follow the instructions at: https://github.com/facebook/react-native/tree/master/babel-preset in order to specify your .babelrc settings.
Update:
I've narrowed this down further to transform-es2015-modules-commonjs, which React-Native sets some options on, specifically {"strict": false, "allowTopLevelThis": true}. The es2015 preset does not set this option, and it seems that the React-Native .babelrc does not override it. If you want to use es6 modules and transform them to commonjs, you'll need to put the following in your .babelrc:
{
"plugins": [
["transform-es2015-modules-commonjs", {"strict": false, "allowTopLevelThis": true}]
]
}
Note, Babel 6, which I updated to along with react-native 0.16.0, no longer contains any transforms by default. What I didn't initially realize is that the React-Native packager provides most of the transforms you might ever need (listed in their docs at: https://facebook.github.io/react-native/docs/javascript-environment.html#javascript-syntax-transformers), and I'm thinking that the "es2015" plugin interferes with some of those transformers.
I also tried using "babel-preset-react" (http://babeljs.io/docs/plugins/preset-react/), and that plugin did not seem to cause any errors.
I solve the problem. I think it was because permissions in project folder. I ran chown in my folder to correct the permissions problems and now all are working.
Thanks
In my case the problem was a rogue .babelrc two folders up (my root code folder); I had initiated a yeoman generator to scaffold out a new project using babel-6...accidentally running yeoman from the root code folder. Apparently babel traversed upwards from my project folders until it hit this .babelrc which borked the react-native babel configs...
^ this was originally an edit to my initial answer, which was deleted WHILE I WAS UPDATING IT