I started a new developer role a few days ago and made some environmental changes to adapt for work. Since then, my hot reload/fast refresh has just stopped working entirely. Changes don't show up even if I refresh the page manually. Only shows changes when I stop the dev server and restart it with 'npm run dev'. The triangle indicator at the bottom right should be active, showing active reload of the window (this no longer shows up consistently either, and if it does the page gets reloaded, but alas the proposed changes aren't visible)
Context:
It has this effect on all NextJS and react applications of mine. Even running a basic project template off the NextJS examples page shows no hot reload working.
I researched this issue and it seems wrong imports (e.g. importing components using lowercase or files in the pages directory being capitalized) can cause this, but I combed through the code and can't spot any issues (of course, I could be missing it but my codebase is over 300 files).
Service workers in the background can cause issues, but I cleared my browser of all of them to be sure and it still doesn't fix it.
I installed ngrok for tunneling for work purposes and docker-compose to handle the work dev. environment.
Made sure I'm using the latest Next version. Even deleted node_modules and ran npm install. Deleted .next and the out folder and still no luck.
Anybody have any ideas or clues to what I should try next? Is it related to the stuff I installed for work? Something related to VS code or WSL2? Seems so puzzling it kind of just happened overnight. Thanks for any insight or advice!
System information
OS: Windows (WSL2 virtualization for VS code)
Browser: Chrome
Version of Next.js: 10.0.3
Version of Node.js: 14.8.0
Deployment: npm run dev for development work; amplify publish for AWS hosting
The problem is with WSL2. I use WSL2 inside VS Code; which is a big performance upgrade in the Linux environment. The problem is WSL2 is actually in a 'virtualization' and thus cannot send information from VS Code AND the browser (localhost:3000) at the same time.
It's a big issue they are working on and there is no fix yet for it. That's why fast refresh doesn't work because localhost is not receiving the changes being made. Either proxy through or revert back to WSL1 https://github.com/microsoft/WSL/issues/4769
Solution provide by OP on question section
Add a .env file or a .env.local file to your root and put this line on it:
WATCHPACK_POLLING=true
Now, restart your server.
Thanks I encounter the same issue with WSL2. I just switch to windows terminal and it works.
If you run Poweshell as administrator and run
wsl.exe -l -v
This will give you th eversion of wsl your distros run on.
I am personally using Ubuntu, and this is the output
Ubuntu Running 2
docker-desktop Stopped 2
docker-desktop-data Stopped 2
To switch to wsl 1,
Run
wsl.exe --set-version Ubuntu 1
and if you wanna switch back,
run,
wsl.exe --set-version Ubuntu 2.
This worked for me.
In my react projects, I just add in my .env file at the root project folder the values
FAST_REFRESH=false
CHOKIDAR_USEPOLLING=true
and it works! enjoy!
The problem is with WSL2. I use WSL2 inside VS Code. But React JS and Next JS projects don't auto-reload. So, add a .env or .env.local (recommended) file to your root and put these lines on it:
WATCHPACK_POLLING=true
CHOKIDAR_USEPOLLING=true
Now, restart your server.
Related
I am working on a project that includes react as frontend technology. Python Django is used for backend and both of them dockerized by a docker-compose file and Dockerfiles. When I try to edit and save index.html or App.js file, nothing happened. Docker container terminal and browser stayed still, despite app's files are mounted correctly in docker-compose file.
When I look up for the solution to this case on SO and other websites, all of the suggestions were made towards to environment variables like CHOKIDAR_USEPOLLING, WATCPACK_POLLING and FAST_REFRESH.
In those websites, WATCHPACK_POLLING was suggested to use instead of CHOKIDAR_USEPOLLING due to using react-scripts version 5.0.1 in my project. So I set WATCHPACK_POLLING=true in environment variable and tried again.
This time webpack compiles with this message in terminal:
frontend-app-1 | Compiling...
frontend-app-1 | Compiled successfully!
frontend-app-1 | webpack compiled successfully
But after compiling successfully nothing happens, browser still does not refresh. I've tried to set FAST_REFRESH=false to enable hot reloading but nothing changed.
I've mixed up old and new solutions and using CHOKIDAR_USEPOLLING and WATCHPACK_POLLING at the same time. This time after editing and saving compiling has done again and browser refreshes but with a slight issue. Browser refresh process cant catch up the compiling and these two process are being done unsynchronized.
So when I change the website title from "React App" to "React" and save it, compilation starts and broser refreshes. Browser still displays "React App" title. After that when I edit index file again to change title from "React" to "Test", refreshed browser diplays title "React". Refreshment is following at least one step behind like this.
Essentially my problem is after edit and save in a dockerized react app, webpack compiles successfully but browser does not refresh.
How can I solve this problem?
Edit: I've tried FAST_REFRESH with these two variables and nothing changed.
Are you editing source code on host machine? If yes then do you have a bind mount of the source code folder or file to the container?
Please try different node versions. I had the same issue recently and got it resolved after taking an image with different node version.
If previous options don't work then you can setup directory synchronization between host and container. See how to rsync from a host computer to docker container using docker cp for details.
I am running a fresh react project with no single line of code written by me.
All I did was:
npx create-react-app my-app
npm install
npm start
The browser window opens and within my console window I see "Starting the development server". It is stuck there, have been keeping it up for over an hour with no progress.
I looked at different SO threads as well as many suggestions on other platforms. From limiting the RAM available to using another port, closing all browser windows, rebooting my machine - nothing helped.
Do you have any suggestions for troubleshooting?
Running on macOS 13.1 on M1 Pro.
It was the directory I started the project in. Using spaces and several special characters seems to break react as well es next.js which I tried next.
I have a Visual Studio project with a simple React ClientApp that I'm using for testing. The client app was working well until suddenly it wasn't. (It may have broken when I added a static wwwroot folder to the project, but that has since been removed--I was testing with a different React App at the time so I wasn't paying much attention to whether my admin utility app was still working.)
Now for the life of me I can't get webpack-dev-server to serve the React app. I've tried:
/invalidate,
npm build
Changing the ports the server is running on
Hitting it from a different browsers.
npm cache clean --force
Reverting back to a much earlier version of the project when this front end was definitely working
Strangely enough if I run npm start directly in the ClientApp folder the app runs fine. For workflow reasons, and for reasons of just wanting to understand how this works, I'd like to keep using the VS launched version.
The symptom is that it simply displays the Index.html page and does not load the app. In Chrome it keeps failing to load 0.chunk.js with error ERR_HTTP2_PROTOCOL_ERROR. In Firefox this there are no errors loading this file, but only the index.html file displays.
I can navigate to /webpack-dev-server and everything looks good. I can click through to all of the individual files from there.
Any ideas for how to diagnose this would be fantastic!
FWIW - if anyone runs into this issue, the solution was to simply update Microsoft.AspNetCore.SpaServices.Extensions to the latest version (in this case 5.0+).
I was following this react course from YouTube.
I installed the create-react-app successfully and also ran the localhost server successfully on my browser afternpm start.
But the problem is that whenever I make a change in the component and save, I have to keep refreshing the browser by myself (browser is not refreshing automatically on save). But the browser of the teacher in that video refreshes automatically.
Please help me. Am I doing something wrong? or what should I do?
I think the best option is to use: npx create-react-app your-app-name when creating your apps so you can always have the most updated version. As per the docs: https://reactjs.org/docs/create-a-new-react-app.html
The best option would be to create your project in a C-drive ( any directory/folder in C drive), where your node packages were installed during the first setup of the node. I had a similar issue when my project was in D-Drive's Directory but switching to C Drive's Directory "C:\Users\USERNAME\Documents\ReactProjects\frontend\src" fixed my issue.
There might be different reasons why this is happening. Try one of the following solutions:
1 --> Increase the maximum number of allowed watchers in your linux environment. This is a known issue when running webpack inside of a VM like WSL2, as it happens when you execute npm start. To do so, issue the following commands in your terminal:
sudo nano /proc/sys/fs/inotify/max_user_watches
Replace the number you see with 1048576 and save the file. Then type exit and relaunch the terminal. Try npm start inside of your project folder again.
2 --> If the above didn't work, try setting the CHOKIDAR_USEPOLLING=true environment variable in your linux environment, which will reflect on your react development environment. Normally you would put this in a .env file inside of your project folder, but adding the variable to your .bashrc file will make it work with any React project you are working on. If you are only experimenting with React for now, I would recommend this solution. This change is unfortunately necessary when working inside of a virtual machine like WSL. Add the line export CHOKIDAR_USEPOLLING=true at the end of your .bashrc file. To edit your .bashrc file:
sudo nano ~/.bashrc
Then save the file and exit/relaunch your terminal. Try npm start inside of your project folder again. Hopefully this should fix it.
When running npm start to deploy my code to localhost:3000 the version displayed is a previous version of the code.
I've tried resetting my editor (Visual Studio Code) and Node.js. Tried disable cache in the network inspector of Chrome.
The browser will reload upon a save, however it will not use the correct code. It continues to 'hang' on the previous version.
This is potentially an issue with the create-react-app service worker.
Can you please look for that file, and remove it or comment it out?
Otherwise, it is possible you have an error in your code.