Important Code for daily use

Git Commands

• Check Git Configuration: git config --list
• Add user name: git config --global user.name "your user name"
• Add user email: git config --global user.email "[email protected]"
• Set a default branch to main: git config --global init.defaultBranch main
• Add: git add .
• Commit: git commit -m "Messages"
• Connect GitHub Repository git remote add origin https://github.com/username/repository_name.git
• Push First Time To Main Branch: git push -u origin main Next Time: git push
• Remove The Last Commit git reset --soft HEAD~1
• Pull Existing Project git pull
• Pull from Other Branch git pull origin branchname
• Check Remote Repository git remote -v
• Change Remote Repository git remote set-url origin https://github.com/username/new_repository_name.git
• Push Forcefully Existing Branch like main git push -f -u origin main
• Check Origin git remote show origin
• Clone with default branch git clone https://github.com/username/repository_name.git
• Clone with specific branch git clone -b branchname https://github.com/username/repository_name.git
• Switch an existing branch git checkout branchname
• Create and Switch a new branch with the current branch code git checkout -b newbranchname
• Check branch git branch
• Delete a branch git branch -d branchname
• Branch Merging git merge branchname

Find your password to pull your private repository

• Log In to Your GitHub Account
• Go to Profile And Click Settings
• Click Developer settings
• Select Tokens (classic) at Personal access tokens
• Select Generate new token (classic) at Generate new token
• Check All And Click the Generate token Button.
• Copy The Token. That is your Password.

React JS

React.js Install Use Vite

// npm 7+, extra double-dash is needed:
npm create vite@latest my-react-app -- --template react

// yarn
yarn create vite my-react-app --template react

// pnpm
pnpm create vite my-react-app --template react

// bun
bun create vite my-react-app --template react

React-router URLs don't work when refreshing or writing manually

// Use this code when hosting it cPannel Home Folder
// Create .htaccess file and paste it

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /
  RewriteRule ^index\.html$ - [L]
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteRule . /index.html [L]
</IfModule>

// Use this code when hosting it cPannel Sub Folder
// Create .htaccess file and paste it

 Options -MultiViews
        RewriteEngine On
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteRule ^ index.html [QSA,L]

Express Server

Install

// npm Initialize 
npm init

// Install Express, CORS, dotenv, MongoDB
npm install express cors dotenv mongodb

Express Setup

const express = require('express');
const app = express();
require('dotenv').config();
const cors = require('cors');
const { MongoClient, ServerApiVersion, ObjectId } = require('mongodb');
const port = process.env.PORT || 5000;
app.use(express.json());
app.use(cors());

// Use app.use(cors()) OR ⤵️

// app.use(cors({
//     origin: ["http://localhost:5173", "https://assignment-10-5fcf9.web.app"]
//   }))

// app.use((req, res, next) => {
//   res.setHeader("Access-Control-Allow-Origin", "https://assignment-10-5fcf9.web.app");
//   res.header(
//     "Access-Control-Allow-Headers",
//     "Origin, X-Requested-With, Content-Type, Accept"
//   );
//   next();
// });

Express Server Deployment steps

1. comment await commands outside api methods for solving gateway timeout error

// Comment following commands

await client.connect();
await client.db("admin").command({ ping: 1 });

2. create vercel.json file for configuring server

{
  "version": 2,
  "builds": [
    {
      "src": "index.js",
      "use": "@vercel/node"
    }
  ],
  "routes": [
    {
      "src": "/(.*)",
      "dest": "index.js",
      "methods": ["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"]
    }
  ]
}

3. Add Your production domains to your cors configuration. Don't use the URL we have provided inside origin. Replace them with your own.

// Must remove "/" from your production URL ➡️ http://localhost:5173/

app.use(
  cors({
    origin: [
      "http://localhost:5173",
      "https://cardoctor-bd.web.app",
      "https://cardoctor-bd.firebaseapp.com",
    ]
  })
);

4. Deploy to Vercel

vercel
vercel --prod

• After completed the deployment . click on inspect link and copy the production domain
• setup your environment variables in vercel
• check your public API

Server Deployment Done If you are using a cookie, follow this extra process. We recommend using local storage to store tokens on the client side to avoid deployment issues.

1. Let's create cookie options for both the production and local server

const cookieOptions = {
  httpOnly: true,
  secure: process.env.NODE_ENV === "production",
  sameSite: process.env.NODE_ENV === "production" ? "none" : "strict",
};

// localhost:5000 and localhost:5173 are treated as same site.  so sameSite value must be strict in the development server.  in production, sameSite will be none
// in development server secure will false.  in production secure will be true

now we can use this object for the cookie option to modify cookies

//Creating Token

app.post("/jwt", logger, async (req, res) => {
  const user = req.body;
  console.log("user for token", user);
  const token = jwt.sign(user, process.env.ACCESS_TOKEN_SECRET);

  res.cookie("token", token, cookieOptions).send({ success: true });
});

//Clearing Token

app.post("/logout", async (req, res) => {
  const user = req.body;
  console.log("logging out", user);
  res
    .clearCookie("token", { ...cookieOptions, maxAge: 0 })
    .send({ success: true });
});