JavaScript

Start scripting in JavaScript by writing your first script, enabling JavaScript in your browser, and placing code in the e-mail page using script tags, inline, or external files.

Understand how JavaScript variables act as containers for data, created with the assignment operator and the declare keyword. Explore variable name rules, case sensitivity, and using strings, numbers, and concatenation.

Explore JavaScript data types, including primitive values like numbers, strings, booleans, null and undefined, and the composite object and array types, plus basic typeof checks.

JavaScript functions are reusable blocks of code you can call anywhere in your program. Learn to define functions, pass arguments, use return values, and understand local versus global variables.

Learn how to define JavaScript objects, create custom objects with object functions, instantiate with the new keyword, and add properties and methods accessed via dot notation.

Explore JavaScript operators, including arithmetic, comparison, logical, assignment, and conditional operators, with examples showing operands and expressions and their resulting values.

Explore how JavaScript uses control statements, including the if statement, else if, and else blocks with comparison operators.

Explore how a switch statement in JavaScript handles multi-way branching by evaluating an expression, matching cases, and using break with a default.

Explore the for loop in JavaScript, which initializes a counter, tests a condition, and iterates by updating the counter, including nested forms to build tables and matrices.

Learn how the for in loop iterates over object properties and array elements, accessing indices and values with the loop variable in JavaScript.

Learn how to use while and do-while loops in JavaScript to perform repetitive actions, initialize variables, check conditions, and increment or decrement until termination.

Master loop control in JavaScript by using break to exit loops early and continue to start the next iteration, illustrated with examples and output flow.

Explore the three dialog boxes in JavaScript: alert, confirm, and prompt, and learn how they display messages, collect user input, and return values via the window method.

Access dom elements with JavaScript using three methods: by form and input name, by id with getElementById, and by the form structure; read input values and show them in alerts.

Explore dynamic HTML with JavaScript by modifying element content, attributes, and styles via document.getElementById and innerHTML, enabling interactive pages through user interactions.

Learn how JavaScript uses regular expressions to validate data, including digits and emails, with patterns for the string start and end; explore literals, character classes, and quantifiers.

Learn how to use JavaScript events to build dynamic web pages by detecting click, load, unload, focus, change, submit, and mouse events, and assign them with HTML attributes or scripts.

Explore the JavaScript date object and its methods for storing and retrieving dates, including get date, get day, get full year, get month, and set methods.

Explore timing events in JavaScript using setInterval to repeat a function at intervals and setTimeout to run once after a delay, with clearInterval and clearTimeout to stop.