Caesar's cipher - Opanuj JS project

This is a practical project from Opanuj JavaScript course, the project is about creating Caesar's cipher(ROT13).

What is Caesar cipher ?

From wikipedia:

In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, D would be replaced by A, E would become B, and so on. The method is named after Julius Caesar, who used it in his private correspondence.

So Caesar's cipher is a simple data encryption technique, it is based on an offset of letters in the Alphabet. In this project I will use 13-letter offset: ROT13

Example

Caesar's code by using a ROT13

plain:  PRZEPROGRAMOWANI
cipher: CEMRCEBTENZBJNAV

plain:  Adrian
cipher: Nqevna

plain:  iLoveHiking
cipher: vYbirUvxvat

Preview

Live GH-pages: https://adrian-karbowniczyn.github.io/caesar-cipher/

Installing

1. Clone this repo git clone https://github.com/adrian-karbowniczyn/caesar-cipher

2. Go into project folder

3. Make sure you have Node.js with npm from nodejs.org or via nvm | n

4. Download all needed packages to run properly this project npm install -D parcel-bundler eslint@latest prettier eslint-config-prettier eslint-plugin-prettier jest babel-jest @babel/core @babel/preset-env npx install-peerdeps --dev eslint-config-airbnb

Usage

In the project folder run npm run dev:serve to start parcel server on http://localhost:5555

Running the tests

To run all the tests just type npm run test

Used packages and tools

• Node.js
• npm
• Parcel
• Jest
• eslint
• prettier
• eslint-config-prettier
• eslint-plugin-prettier
• eslint-config-airbnb
• babel-jest
• @babel/core
• @babel/preset-env