When I save changes to my client-side code, the browser hot-reloads as expected. But when I make changes to my server code, no hot-reloading occurs. This is a problem because we want to just run 1 command (i.e. npm start) to launch our React webpack-dev-server AND our API server, and rerunning the entire npm start to manually relaunch the server after changes is slow (because it unnecessarily relaunches the React dev-server as well). Also sometimes we forget to relaunch the server code, so in reality it should just hot-reload anyway.
I've looked across the internet and surprisingly can't find any straightforward solutions. I feel like I shouldn't have to eject the entire project and go deep into the webpack configurations to get this to work.
This is what the npm start portion of my package.json looks like now:
"scripts": {
46 "start": "concurrently --kill-others \"react-scripts start\" \"node server.js\"",
...
}
Is there perhaps a way I can do "react-scripts start" with a different target or something?
Related
I am very new to server side scripting. And I am using NodeJS. My Problem is that after adding some new features to the app, i.e. after changing the code, these changes will be applied only after restarting the server. Till then NodeJS behaves so as though I hadn't changed anything. So for instance if I add console.log("works") and don't restart the server, then it hasn't any effect.
I am using Nuxt.js, which is actually the Vue.js framework but with additional and very usefull features mainly for server side rendering. I didn't integrate the express.js at the beginning of the project, beacause it wasn't planned to write any server side code. So I am normally exporting express and using it, which is pretty fine for me, since I need just a couple lines of code to use the NodeJS file system.
So, as it is pretty hard to code, if I should restart the server once I changed anything, I want to ask you if there is any solution to this problem.
Use nodemon
step 1 : npm install -g nodemon <- this will install nodemon globaly in your system
step 2 : change your start script within package.json
"scripts": {
"start": "nodemon fileName" <- like this //filename is you root file which starts the app like app.js
}
step 3 : npm start
This is already build in into nuxt. You just need to run it in dev mode, not in production.
E.g. for dev with change monitoring
nuxt
For production without monitoring
nuxt start
So in this particular case the following changes to the "scripts" in package.json have solved my problem.
"scripts": {
"dev": "nodemon --watch api --exec \"nuxt\"",
"start": "nodemon nuxt",
}
The following link could also be usefull to you.
Install nodemmon in your application to allow live update npm -g install nodemon
and add the following codes inside your packages json file :
"main": "app.js",
"scripts": {
"start": "node app"
},
on your command line, just type : start
I have a node app which in development is usin 2 servers one for my node side and another for my react side. I am running this using a line in my package.
"scripts": {
"start": "node app.js",
"server": "nodemon --inspect-brk app.js",
"client": "npm start --prefix client",
"dev": "concurrently \"npm run server\" \"npm run client\""
},
when I run npm run devit all works, however when I run node start the server starts running however when you go to the / root url it gives a 404 status error. I assume that's because the app doesn't know where to look for the index.html file or how to kick off the app though I could be completely wrong.
my folder structure is:
As you can see my client folder holds all of the react stuff. the src is the uncompiled react and the build holds my actual index.html fil along with the static folder which holds the compiled react stuff :
so how do I get that to actually work or point me in the direction to look? I guess i've been spoiled with most apps just knowing out of the box how to do this.
UPDATE:
so i have 2 routes currently setup
//initiate route handlers
app.use('/login', require('./routes/authRoutes'));
app.use('/tiles', require('./routes/tileRoutes'));
inside of /login I have for example
router.get('/', (req, res)=>{
some code here...
}
however going to either of those, so if I navigate to localhost:5000/login, I still get a 404 error
If I understand this correctly it works when I run npm run dev because 2 serves spin up. the one server handles all my node code and the second handles all my react code. However I don't want to run 2 servers as my deployment to heroku definitely won't. So how do I merge to 2 so to speak?
Use express.static() function to host static files on your express server. See more here: https://expressjs.com/en/starter/static-files.html
I'm a Java developer but I have to try and debug a Node based application which runs inside Electron. I use IntelliJ IDEA for Java development/debugging and have WebStorm for which I want to debug the JS application.
As a Java developer I am used to starting the JVM/Tomcat/OSGi container in debug mode to which I can attach IntelliJ as my debugger. This allows me to dynamically add breakpoints without modifying code in IntelliJ. I want to be able to do the same with the Electron application but I haven't been able to work out how to do this.
I have tried starting Election with the --inspect option as detailed here but cannot attach WebStorm to it. I've also tried setting up a run time configuration in WebStorm itself which works as far as starting Electron but terminates with the error 'connection refused'.
I've also used this and this to try and attach a debugger but to no avail. I also have to work on Windows so I'm facing having to deal with inadequate tools to determine if Electron is listening on a port.
Update
I can't put complete code here but I would start the application with:
npm run dev
And this is the relevant part package.json in the root folder of the application but WITHOUT any debugging options specified:
"dev": "concurrently --raw --kill-others \"npm run dev-server\" \"npm run start\"",
"dev-server": "webpack-dev-server --hot --inline",
"start": "cross-env WEBPACK_ENV=dev electron .",
The application starts up i.e. the Election window appears but terminates before it is completely rendered. I can't say for sure how far into the start-up it gets before failing.
Update 2
I've modified the package.json file dev and start lines to:
"dev": "concurrently --raw --kill-others \"npm run %NODE_DEBUG_OPTION% dev-server\" \"npm run %NODE_DEBUG_OPTION% start\"",
"start": "cross-env WEBPACK_ENV=dev electron --inspect=5858 --remote-debugging-port=9223 .",
But still get Connection refused.
To debug Electron main process, you need using Node.js run configuration; for render process, the Attach to Node.js/Chrome configuration is required.
Please see https://blog.jetbrains.com/webstorm/2016/05/getting-started-with-electron-in-webstorm/ for more info
I found that WebStorm can debug the main process properly if electron is started with the flag:
electron . --serve --inspect-brk=5893
Note the 'brk', it stops the process until a debugger is attached.
Then I just created a run configuration (Attach to Node.js/Chrome) and specified the 5893 port, telling to reconnect automatically.
I've looked around and had a lot of trouble figuring this out. I'm hoping someone might be able to point me to a post or have information on how to do this.
My problem is that I have 2 projects I've made using WebStorm:
I have 1 application that is my server-side code running on port 3000. It's a simple Node Express app.
The second application is an Angular 4 / Ionic 3 application running the client side on port 8100.
I want to run my server application in debug mode, so that it hits the breakpoints for all the data being sent from the client side app.
For example: Angular / Ionic app sends a get request for all clients for a given customer. The customer is sent via url parameter. I want the server code to pause when it receives this request and so I can see this URL parameter. Fairly simple.
The server is also using grunt to build the project, and nodemon to watch it. I'm using some npm scripts to make life easy. Here are the scripts:
"scripts": {
"dev": "SET NODE_ENV=development && nodemon ./bin/www",
"grunt": "grunt",
"start": "node ./bin/www"
},
Nothing fancy.
I have WebStorm configured to run my scripts from hitting play. So the play button will first run the following sequence:
npm run grunt
npm run dev
Again ... nothing fancy.
Now how do I get this thing to setup a debugger so I can listen in WebStorm? I have a both projects open in separate windows, and I am initiating the calls to the server from the client. How do I make the break points grab hold and show me the data coming into the server?
I feel like this is incredibly easy and I'm missing something really stupid. Any help would be much appreciated.
You need starting you server in debugger to get breakpoints in your server code hit. If you prefer to start your app via npm script, you have to add $NODE_DEBUG_OPTION (or %NODE_DEBUG_OPTION% on Windows) to make sure that Node.js is started with appropriate debug options (--debug-brk, --inspect-brk, etc)
So:
in package.json, modify your dev script as follows:
"dev": "SET NODE_ENV=development && nodemon %NODE_DEBUG_OPTION% ./bin/www"
right-click your package.json, choose Show npm scripts
right-click dev script in npm tool window that opens, choose edit 'dev' settings to create a run configuration.
open your source files in editor, add breakpoints
press Debug to start debugging
run your client app, initiate the calls to the server
I have completed todo app by learning from this video:
Super MEAN Stack Tutorial: Angular, Node/Express, Webpack, MongoDB, SASS, Babel/ES6, Bootstrap
In that video at time 19:18 at this url it is taught that I should use the below two commands in seperate git-bash instances if I want to run it in windows using npm run dev:
node server
webpack-dev-server --progress --colors
But in Linux (or any other OS than windows) you can use this script:
"Scripts": {
"start": "NODE_PATH=$NODE_PATH:./src node server",
"dev": "npm start & webpack-dev-server --progress --colors"
}
So, Is there any way I can do the same in windows?
Also, In that tutorial I can see that port no. 3000 is assigned to node server, but due to using dev dependencies he runs the localhost:8080 in browser. You can see that here. After the tutorial finishes, I followed along and created that app. Now I would like to deploy it. So, I would first like to learn to run test my site in non-dev dependencies mode. i.e. when I type localhost:3000 in browser, my app should run successfully. So, can anybody explain the steps for that?
Update:
I am a newbie in node.js. I watched many videos on node and tried to learn something from that. In all the videos I see that I run node server on port no. 3000 and then I type localhost:3000 in my browser. Now lastly I watched video about mean stack in which he uses webpack. Now, I am confused. I think there are two servers running. first server is webpack's server and second server is node's server. Upto today I typed localhost:3000 in my browser because I mentioned that port 3000 will be used by node in my code. But now in the video he is running localhost:8080 in browser. It means webpack's server is used. Then what happened to node server. Why can't I just run localhost:3000? Also in the video it is explained that webpack is a dev dependency. So, I think after the app is completed and ready to be deployed, my project can be run on the node server (by making some changes to the code, I am not sure). Let's take an example. Now I don't want to deploy the app to a real server. I want the same app to run on my friend's pc. He is not a developer. So, he should not depend on webpack as webpack is a dev dependency. So, he should be able to run the app on node server instead of webpack's server. So, he should type localhost:3000 instead of localhost:8080. That's what I don't understand.
Let's break this down:
If you've defined this script:
"Scripts": {
"start": "NODE_PATH=$NODE_PATH:./src node server",
"dev": "npm start & webpack-dev-server --progress --colors"
}
... then this npm command: npm run dev
... actually invokes these two actions:
a) npm start & # Runs NPM in the background
b) webpack-dev-server --progress --colors # Concurrently runs webpack in the foreground
You can accomplish the same thing in many ways using Windows, starting with a simple .bat file like this:
EXAMPLE: RunDev.bat:
start npm start
webpack-dev-server --progress --colors
=======================================================================
STRONG SUGGESTION:
Please forget about watching videos for a few moments. Try a couple of "hello world" tutorials. More importantly, play with the actual code. Try changing things in the code, and see what happens.
Forget about webpack, at least for the moment.
Think of npm as a "build tool"; not as a way to run your application. At least for a moment.
Focus on "node". Write a "node application".
Part of your "node application" will require "ExpressJS" and "Jade" (now renamed "pug" - I'm still using "Jade"). Use npm to get your ExpressJS and Jade dependencies, but stay focussed on Node.
SUGGESTED TUTORIAL:
A Simple Website in Node.js, Ben Gourley
Be sure to:
a. Download the code
b. Work through the tutorial, using the downloaded code
Please post back (a new post) with any specific questions you might have as you work through the tutorial.