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ML SystemPart 1: Core ConceptsChapter 2
CH.02 ~20 min

Web Foundations

HTTP, JSON, and the Document Object Model.

HTTPJSONDOM
  • Explain the transition from traditional web renders to SPAs.
  • Describe the role of JSON in modern web communication.
  • Identify the limitations of direct DOM manipulation.

01 Web Foundations & SPA Architecture Viz

Definition

Thin Client

A browser function where the primary task is simply rendering static HTML documents received from the server.

Definition

JSON (JavaScript Object Notation)

The de facto standard for modern data exchange, being lightweight and directly compatible with native JavaScript objects.

02 The Document Object Model (DOM)

Spaghetti Code

As applications grow complex, tracking data status and manually syncing it with DOM elements often leads to 'spaghetti code'—unstructured logic that is nearly impossible to maintain.

Key Takeaways

  1. 1SPAs load a single HTML document and fetch raw JSON data asynchronously.
  2. 2JSON has replaced XML as the standard for web data exchange.
  3. 3Direct DOM manipulation is inefficient and leads to maintainability issues in large apps.

CH.02

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Reading
Exercise

Interact with the visualization

Quiz

Infrastructure Quiz

Test your understanding of DNS, CDN, Load Balancers, and Reverse Proxies.

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5 questionsRandomized from pool70% to pass