LPI Web Dev Essentials study plan

Map the five exam domains to a personal checklist and mark the two heaviest (031 and 034) as priority blocks

Explain the HTTP request/response cycle and identify where client markup, styling, scripting, and server code each fit

Write 15 short JavaScript snippets covering variables, let/const scope, and primitive vs reference types

Set up a version-controlled project folder with a README and run every snippet from the command line

Implement functions using declarations, expressions, and arrow syntax, and explain how this binding differs

Manipulate arrays with map, filter, reduce, and sort without mutating the source

Handle asynchronous flows with callbacks, Promises, and async/await, including error paths via try/catch

Use objects and JSON serialization to transform and merge data structures

Select and modify DOM elements using querySelector and querySelectorAll

Attach and remove event listeners, and explain event bubbling versus capturing

Validate form input on the client and render inline error messages

Describe the Same-Origin Policy and CORS at a conceptual level in a short written note

Build a page using correct document structure: doctype, html, head, body, lang, and charset

Apply semantic elements (header, nav, main, section, article, aside, footer) appropriately

Construct accessible forms with label-for associations, fieldset/legend, and required attributes

Embed images with meaningful alt text and add a data table with caption and scoped headers

Apply the box model, margin collapsing, and box-sizing correctly across a layout

Use Flexbox to build a responsive navigation bar and card row

Use CSS Grid to create a two-dimensional page layout with named areas

Write media queries for mobile-first breakpoints and verify behavior at three widths

Explain specificity and the cascade, and resolve three deliberate style conflicts

Initialize a Node.js project and explain the roles of package.json and node_modules

Use CommonJS require and ES module import/export in separate small files

Read and write files asynchronously with the fs/promises API and handle errors

Build an HTTP server with the built-in http module that routes at least three paths

Consume an environment variable and explain why secrets stay out of source control

Build a JSON REST API with GET, POST, PUT, and DELETE handlers and correct status codes

Parse request bodies and validate payloads, returning 400 on malformed input

Connect the week-3 front end to the API using fetch and render server responses

Explain the difference between authentication and authorization in a short note

Review all five domains against the week-1 checklist and close every gap

Complete a timed 60-question mixed practice set and log every wrong answer by domain

Re-implement the two weakest topics from memory without notes

Write a one-page summary of HTTP, semantics, cascade, async, and Node routing