Practical JavaScript & ES6 concepts Mostly used in Projects

Understand how JavaScript variables act as placeholders that store values of any data type, and how the dynamically typed language derives the data type from the value as it changes.

Master practical JavaScript and ES6 concepts by learning how to use comments in JavaScript, including single-line and multi-line comments, and how to comment out code.

Explore practical JavaScript operators and operands, including unary and binary operators, arithmetic, string concatenation, exponentiation, increment/decrement, and ES6 template literals for concise code.

Demonstrates string concatenation techniques in JavaScript, comparing traditional concatenation with template literals, and explains escaping quotes, newline handling, and string length in practical examples.

Master essential JavaScript string functions, including length, indexOf, lastIndexOf, slice, and substring, then learn toUpperCase, toLowerCase, trim, replace, and charAt with charCodeAt.

Understand JavaScript scope, including global, local, and function scope, and learn how let and const manage variable accessibility and immutability in code.

Explore control statements in javascript and es6, mastering if else and switch case to drive program flow through true/false conditions, comparisons, booleans, and default paths.

Explore objects in JavaScript, create and access object properties, use dot and bracket notation, and apply object destructuring (restructuring) to extract values.

Explore arrays in JavaScript: create arrays with mixed data types, access elements by index, check length, and use push, splice, and sort, plus array vs object concepts.

Define and call JavaScript functions to avoid repetition, pass parameters, and optionally return values; explore named functions, parameters, returns, and default values with practical examples.

Learn to build interactivity in JavaScript using alert, prompt, and confirm. Capture user input with prompt, parse to numbers, and use confirm to drive decisions.

Explore practical javascript looping constructs, including for loops and while loops, with initialization, condition checks, and increments, and apply them to arrays and objects.

Discover the spread operator in JavaScript, learn its role in joining arrays and adding new elements to existing ones using spread syntax.

Explore the ternary operator in JavaScript, a handy one-line conditional. Learn how condition ? trueValue : falseValue selects output based on a true or false condition.

Learn how to use the array filter function in JavaScript to create a subset of data, such as people over 18 eligible for voting or work, with practical examples.

Master the document object model and learn to select HTML elements by id, class, or tag, then dynamically modify their properties with JavaScript.

Learn to select and manipulate dom elements with JavaScript, using getElementById, getElementsByClassName, and querySelector, then read and set values, innerText, and attributes to modify content and styles.

Explore how events and event listeners in JavaScript trigger on click, change, focus, and keydown, and learn DOM manipulation and binding to modify elements and text.

Schedule code with setTimeout to run after a delay and cancel it with clearTimeout when needed. The lecture demonstrates timer creation and delaying DOM updates, with cancellation for expiry scenarios.

Use setInterval and clearInterval to run code repeatedly in JavaScript, compare with setTimeout, and implement dynamic updates like color changes on the page.

Explore date and time handling in JavaScript by creating date objects, displaying current time in various formats, calculating elapsed time, and converting between local and UTC time.

Learn to calculate new dates and time differences using milliseconds, measure code performance, and build clocks and a world clock that reflects different time zones in JavaScript.

Discover how JSON, JavaScript object notation, enables data exchange over the internet by converting between objects and JSON strings, and between front-end and back-end systems.

Explore arrow functions as the ES6 shortcut for JavaScript functions, compare them to traditional functions, and learn concise syntax, parameter options, and implicit returns with examples like setInterval.

Explore the window and document objects, and learn how to use localStorage and sessionStorage to persist and retrieve data, including storing objects as strings and converting them back.

Explore the JavaScript Math object and its core functions, from constants like sqrt(2) and e to rounding, powers, absolute values, min/max, and random number generation, with hands-on console examples.

Learn to convert a traditional JavaScript function to an arrow function in ES6 by building a simple add function, testing with two numbers, and observing the result.

Demonstrate how the spread operator in ES6 adds items to arrays and objects, replacing push with spread for concise, flexible updates.

Explore the forEach loop as an ES6 alternative to the traditional for loop, showing how to access element, index, and the full array while printing objects and handling outputs.

Learn to use the includes method in js to check if a name exists in an array. Shows whether the employee exists or not and aligns with front end usage.

Explore how the filter function in JavaScript returns employees with age greater than 20 from an array, and how you can combine conditions including name checks and API data.

Explore default parameters in es6 and how they assign default values to function arguments, using a calculate area example to show that passing a value overrides the default.

Learn how to create multi-line strings in es6, using a syntax that lets you write text across several lines within a single string, as shown in the example.

Explore template literals in es6 to simplify string creation by embedding variables with ${} instead of concatenation. Gain practical insight with examples of console output and dom manipulation.

Explore es6 modules by exporting values and functions from one file and importing them into another. Learn to use relative paths and declare the module type for proper loading.

Master array and object destructuring in ES6, using square brackets for arrays and curly braces for objects to extract fields like name and age, and handle missing values.

Explore optional chaining in ES6 to safely access nested object properties, preventing runtime errors when intermediate objects, like contact or mobile, are missing.

Build a functional calculator app by wiring up inputs, selecting an operation, and handling validation to compute and display results. Supports addition, subtraction, multiplication, and division.

Create a practical JavaScript app that generates a random number between two user-specified numbers, with input validation and a simple user interface.

Learn to fetch data from a server using fetch to retrieve posts as json, loop through results, and display post titles and bodies on a webpage.