JAVASCRIPT + NODE.JS · 25 lessons

Browsers, the console, the `<script>` tag, runtime environments and DevTools

`let`/`const`, primitive types, `typeof` and type conversion

Arithmetic, comparison, logical operators, optional chaining and nullish coalescing

`if`/`switch`/`for`/`while`/`for...of`/`for...in`

Declarations, expressions, parameters, return values, scope and default values

Object literals, property access, methods and computed property names

Indexes, `push`/`pop`/`shift`/`unshift` and iteration

Template literals, string methods and an introduction to regular expressions

Destructuring, `...rest`, `...spread` and default values

Arrow functions vs `function`, implicit returns and `this` differences

`map`, `filter`, `reduce` and method chaining

Lexical scope, closures and the module pattern

`class`, `extends`, `super`, `static` and getters/setters

`setTimeout`, the event loop and callback hell

`Promise`, `then`/`catch`, chaining and `all`/`race`

`async` functions, `try/catch` and parallel vs sequential execution

`querySelector`, attributes and `textContent`/`innerHTML`

`createElement`, `appendChild`, `classList` and `style`

`addEventListener`, `preventDefault` and event delegation

`input`, `submit`, HTML5 validation and `FormData`

`fetch`, `JSON.parse`/`stringify` and error handling

`localStorage`, `sessionStorage` and an overview of cookies

`import`/`export` and `<script type="module">`

Running `node`, `process`, `fs` and CommonJS vs ESM

`package.json`, scripts, dependencies and building a CLI