Stage 1 · Lesson 3 of 8
Data mapping between steps
means choosing which output of an earlier step fills each input of a later one. The email from the form goes into the 's email field. The first name goes into the greeting.
Each earlier step hands over its data as , and you pick fields from it. Every tool lets you do this visually, by clicking or dragging. Each also has an language: short formulas that change the data on the way, such as trimming spaces, lowercasing an email or joining first and last names.
Most real bugs live in mapping. So always run a step with real sample data and read the result before moving on.
Common trapmapping from a test record that has every field filled in; real data has blanks, extra spaces and unexpected formats.
A question to check yourself, an AI practice session and 2 cheat sheet entries come with the full roadmap. Unlock
Resources for this stage
Start with· follow one of these
- GuideFreeMDN: HTTP
Mozilla · Beginner
Read the overview, methods, status codes and headers pages: the HTTP every automation tool sits on
- GuideFreeJavaScript.info
Ilya Kantor
The JSON methods and objects chapters teach you to read and reshape the data each step passes on
Practise
Keep handy
Also worth your time
Status codes, pagination, idempotency and rate limits from the API side, so you know what to expect as a caller