pubspec.yaml
- Dart course
- Intermediate
- Lesson 95/116
- 5 min
Learn the pubspec.yaml configuration.
The pubspec.yaml structure
pubspec.yaml is the configuration file of a Dart package. It holds the package name (name), version (version) and Dart SDK constraint (environment).
Dependencies go in the dependencies section: http: ^1.0.0. Development dependencies go in dev_dependencies; like the test package.
YAML is indentation sensitive; use two spaces. Not tabs.
dev_dependencies
dependencies are for runtime dependencies; required for the program to run. dev_dependencies are needed only during development; test and code generation tools.
For example the test package goes in dev_dependencies; it does not run in production. http goes in dependencies.
When publishing dev_dependencies are not fetched; the package stays smaller.
Practice dart:convert and jsonEncode
Import the convert library with import 'dart:convert';. In main print the result of jsonEncode({'name': 'Dart', 'version': '3'}) with print.
Starter code
// Import the dart:convert library
void main() {
// print a Map with jsonEncode
}Sample solution
import 'dart:convert';
void main() {
print(jsonEncode({'name': 'Dart', 'version': '3'}));
}Expected output
{"name":"Dart","version":"3"}
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 In which section are dependencies?
- name
- dependencies Correct answer
- version
- environment
Explanation: dependencies go in the dependencies section.
2 The dependencies section
dependencies:
____: ^1.0.0dependencies:
http: ^1.0.0Explanation: the http package goes under dependencies.
3 pubspec parts
| Term | Meaning |
|---|---|
name: |
Package name |
version: |
Version |
environment: |
SDK constraint |
dependencies: |
Runtime dependencies |