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| Observation | Diagnostic question |
|---|---|
| Runtime value | What value actually arrived? |
| Language rule | Which rule determines the result? |
function formatUser(name) {return name.trim().toLowerCase();}console.log(formatUser(' Amina '));
This example demonstrates testing functions and modules directly. Change one input at a time and observe the result; the goal is to connect the syntax to the runtime behavior rather than treating the snippet as a recipe.
This example demonstrates testing functions and modules directly. Change one input at a time and observe the result; the goal is to connect the syntax to the runtime behavior rather than treating the snippet as a recipe.
A common failure with testing functions and modules is changing several variables at once. That hides which rule actually caused the result.
Finish the lesson once you have worked through the material. This awards ★ 20 XP.