Tutorials

Learning-oriented walkthroughs, worked end to end. Each page starts from a working environment and builds one small, runnable task at a time: every code block runs, and the prose explains it as you go. Start with Foundations, then work through Real-world once the mechanics feel familiar.

• Foundations
  • Getting started
  • Tokenizing a document
  • Parsing a document into a tree
  • Building and editing a tree
  • Exporting to text
• Real-world
  • Finding what you need
  • Reading messy bytes
  • Pulling content out of a page
  • Working with forms
  • Cleaning and shrinking HTML
  • Transforming without a full tree
  • Doing a one-off job from the shell