How to install brain.js on Mac? - javascript

I need help with downloading brain.js in to VS Code. I have looked on YouTube and Stack Overflow for answers, nevertheless I could not find any solution. I hope so one can describe me what to do.

Open command prompt in the folder with the program and type
npm install --save brain.js
In the node.js program, put
const brain = require("brain.js");
If that doesnt work, go to the website and you might find something there, or i found this good video. the video

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React - Browser doesn't detect changes and console says '[HMR] Waiting for update signal from WDS...'

I am pretty new to React, sorry if I am asking something stupid. Any help would be highly appreciated :)
ENVIRONMENT
Ubuntu 20.04 in Windows 10 (WSL2)
Node version - v14.1.0
Npm version - v6.14.7
Code editor - VS Code v1.14.0
STEPS I DID
npx create-react-app <app-name>
cd <app-name>
npm start
https://localhost:3000 opens up in browser with default React landing page. Console says '[HMR] Waiting for update signal from WDS...
'
Delete all files in src directory and create empty index.js in src directory.
Output expected: Blank screen
Output: Default landing page of React even if I reload the page.
Struggles I made before asking this question :(
Looked in issues of create-react-app.
Tried troubleshooting create-react-app as mentioned in official docs.
Looked in stackoverflow for similar questions. Found some but none worked, maybe because my dev environment was different from them (WSL2 in Windows 10).
That sounds like a caching issue to me. My guess would be to clear your google chrome cache and try again. If that doesn't work, check your package.json file and make sure that under "scripts": "start" it says "react-scripts start".
Yayy! The issue is resolved.
It was my mistake :(.
All these days, I was trying to access the Windows filesystem from WSL2 and it seemed to be very slow. So I decided to work in the Linux filesystem itself. And everything works fine now. Thanks for helping :)

How napchart.com is constructed

I want to build a site similar to this one.
So I downloaded the source code from https://github.com/larskarbo/napchart on my Windows 10 machine, but I don't know how to execute the thing and see it running in a page so I can play with the code and see how it is working.
I have node.js installed but I am not sure of how to use it, so detailed instructions are welcomed
Also, I tried saving the code from the site directly by clicking Save As but it didn't work though. Why is that happening?
Considering napchart has been pushed to the npm registry, you shouldn't need to interact with its source code directly.
As per your second question, I don't advise to download any of it manually. Running npm install napchart --save in your project directory should get you going.
That being said, the author also published the source of https://napchart.com/app, which can help you bootstrap your project.

Webpack installation - es6

I am an es6 newbie!
When all webpack installation were done, I started trying to create some files as in the pic
and then i tried to write some code in index.js and checked whether it run or not using command
npm run build
and it ended up with a bunch of errors like the pic below
I've been searching a while to resolve this prob but I still cant find out how to solve it.
Plz give me some suggestions to save my day.
I really appreciate your comments!
agree with Andrew Li.
You also need to write some run script in your package.json if you want to use npm command

Netbeans project - Node.js: Node must be a valid file

I’ve just created my first Node.js application in Netbeans. I mean, this is a brand new project. I haven't done anything and I’m already getting an error. Maybe there is a step to configure this or a file to create or something to install but I've googled for information to no avail. I guess this is just too basic, because I couldn’t find anything out there to help.
What does this mean and how can I fix it?
Duh! I found it. For some reason the Node path and the npm path were defaulting to Program Files (x86) and nodejs was installed in Program Files. I feel dumb.
Plus, as soon as I fixed it, all other new projects were fixed.

How to connect node.js to mysql and wamp/xampp server?

I'm a PHP programmer and currently working with WP, CI, OC.
I am absolute beginner of node.js, want to know how to connect MySql and WAMP/XAMPP in step by step method.
If I am going to live it, then what will be the live server setup.
Please let me know in step by step method.
Follow this tutorial.
Tutorial Here
To use node.js you need to install the packet manager NPM and use it to install the dependencies of your project.
In the example tutorial I posted above hes uses NPM to install all his dependencies to connect to mysql just as you requested. He also provides sample code.
Good luck!
Here is another few tutorials you might follow,
Click Here
This uses mongoDB instead of mysql but following this tut will help you get things running quicker then you can find something to help with mySQL.
Click Here
After installing npm with the tutorial right above here and you check and make sure you have npm installed then follow this youtube tutorial to get mysql set up with node.
And here is a youtube video.
Click Here
It might help to use this package Node Mysql Package. Also you can find the resources in the answer to this question here.

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