Lesson 1.7 of the JavaScript tutorial — function declarations vs expressions vs arrows, parameters and arguments, default and rest params, returning values, and the call-vs-pass distinction that makes higher-order JavaScript work.
JavaScript Basic Functions: Declarations, Calls, Return Values, and Arguments Read More »
Lesson 1.6 of the JavaScript tutorial — every loop construct (for, while, for-of, for-in), when to reach for each one, the classic mid-iteration mutation bug, and why most modern code prefers array methods like map and filter.
JavaScript Loops Explained: for, while, for-of, for-in — When to Use Which Read More »
Lesson 1.5 of the JavaScript tutorial — if/else, ternary, switch, short-circuit conditionals, plus the lookup-object and early-return patterns that experienced developers reach for instead of nested conditionals.
Lesson 1.4 of the JavaScript tutorial — every operator category (arithmetic, comparison, logical, bitwise, assignment) plus the four modern operators (??, ?., ??=, **) that changed how everyday JavaScript reads.
JavaScript Operators Explained: Arithmetic, Comparison, Logical, and the Modern Ones Read More »
Lesson 1.3 of the JavaScript tutorial — the 8 data types (7 primitives + 1 object category), the difference between value-passed primitives and reference-passed objects, and the typeof gotchas (null, NaN, function, array) every JS developer needs to know.
JavaScript Data Types Explained: All 8 Types and the `typeof` Quirks Read More »
Lesson 1.2 of the JavaScript tutorial — what var, let, and const really do, the five-dimension comparison (scope, hoisting, reassignment, redeclaration, globals), and the modern rule of thumb: const by default, let when reassigning, never var.
JavaScript Variables: let, const, and var — The Practical Differences in 2026 Read More »
Lesson 1.1 of the JavaScript tutorial — the difference between JavaScript the language and ECMAScript the spec, what engines vs hosts actually do, and every place JavaScript runs in 2026 (browser, Node, Deno, Bun, edge, embedded).
What is JavaScript and Where it Runs: A 2026 Developer’s Guide Read More »