Firebase CRUD

Learnings:

• !! : coerce a value to its boolean equivalent

var a = 0 ;
var b = !!a; // b will be false, since 0 is falsy

• ?? : nullish coalescing operator

const value = null(or undefined);
const result = value ?? "default";
console.log(result); // Outputs: "default"

• ?. : optional chaining operator short-circuits the evaluation if any intermediate property in the chain is nullish (null or undefined), and returns undefined instead of throwing an error.

• JSON.parse

const value="false"
JSON.parse(value)  // Output: false in boolean

• Creating a props that depends on other props in TypeScript

Some useful github repos to check out:

• TypeScript CheatSheet
• TypeScript:Scratching the surface -> dependent props
• 33 JavaScript Concepts Github
• React Firebase hooks
• Server side pagination in React table blog and github link
• pagination