ES6, ES7 & ES8, TIME to update your JavaScript / ECMAScript!

Validate SQL statements using tagged templates for select or update with where and order by. Implement axios-driven UI that renders coins via templates, using closures, and mocks a DB upload.

Explore ES6–ES8 function updates, including default parameters and the rest operator, with examples of the arguments object and notes on destructuring.

Explore spread syntax and rest operator, showing how rest collects arguments into an array and spread unpacks an array into individual parameters. Apply it to arrays, objects, and reducers.

Master object literals and destructuring in JavaScript, using property shorthand, renaming, nested destructuring, array destructuring, and function parameter destructuring to write cleaner, readable code.

Explore the history and core concepts of JavaScript classes, including why ES6 class syntax is syntactical sugar over prototype inheritance, and how this shapes modern JavaScript design.

Explore how setters and getters manage access to object fields across JavaScript and Java, using private and public modifiers, and understand mutator functions for encapsulation.

Explore how to use array find and findIndex with callbacks to locate the first city whose main.temp exceeds a threshold in weather data, and compare with map.

Discover how the set constructor guarantees unique elements, holds any data type, and maintains insertion order, with practical usage of add, size, clear, delete, and iteration methods.

Weak sets hold only objects, use weak references, rely on garbage collection, are not iterable, have no get method, and size is zero, useful for tagging objects.

Explain what a promise is and why it matters in JavaScript, showing how promises replace callback hell with then, catch, all, race, and the resolve/reject flow.

Explore promise syntax by building a simple promise, understanding the constructor, resolve and reject, and chaining with then, catch, all, and race for asynchronous flows.

Learn to chain promises for fluent asynchronous programming by replacing callback hell with sequential Ajax calls that fetch movie data, cast, and person details.

Explore the proxy constructor and reflect to intercept and control object operations with traps for get, set, has, construct, and apply, enabling middleware and validation.

Explore Reflect in JavaScript by using Reflect.apply, defineProperty, getOwnPropertyDescriptor, deleteProperty, and proxy traps, and learn how Reflect provides introspection and safe, cleaner object interactions.

Explore generators, iterators, and iterables in JavaScript, and master the for-of loop, while comparing concepts with Python origins and using Mozilla documentation for clear references.