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JavaScript5 min read

DOM Overview

Read this chapter, then pass a short check to open the next one.

How pages become objects.

DOM Overview

The DOM is the browser’s object tree for HTML. JavaScript reads and updates nodes to change the UI. Write tasks here are quiz-focused (no real browser in the grader).

  • document.querySelector finds elements.
  • textContent / innerHTML update content (prefer textContent when possible).
  • Events (click, submit) drive interactivity.

Practice selecting mental models on Quiz — browser labs come with React later.