Q47. What is the purpose of tsconfig include and exclude?
include selects files or patterns to include in the project, while exclude removes matching files from inclusion patterns. Imports can still bring excluded files into the program. files can explicitly list source files. Understand the project boundary so tests, generated output, and dependencies are handled intentionally.
Excluding dist prevents generated output from being picked up by broad include patterns, but imported files can still participate in compilation.
Note
Interview approach: define the concept, explain why it matters, then mention one trade-off or limitation.
TypeScript concept
// Illustrative TypeScript contract
type Identifier = string;
const id: Identifier = "item-1";💡 The example demonstrates the compile-time contract discussed in this question.
Key Takeaways
- Explain the concept in your own words.
- Know the practical trade-off and its limits.
- Use a small example to demonstrate the idea.
Knowledge Check
Does exclude always prevent an imported file from being compiled?