1.3. ESN and ECMA

ECMAScript: a type of the Specification ex. ES6 <=> ECMAScript6 => Update on Specification (like an Instruction Manual!! => JS is a specification!!)
Then browsers read and implement codes per Specification in their Ways

3. Make your First JS App

3.0 Making a JS Clock

EX. : new Date() : setInterval

4. Make a To-Do List

LocalStorage values: can only be string => JSON.stringify(object) => JSON.parse(Stringified Object)

5. Background Image

Unsplash.com
Create an image element and append it to body

6. Weather

navigator.geolocation.getCurrentLocation()
Openweathermap : free : API key