• default - For library package (output on both commonjs and esmodule)
• app - For application package (output only commonjs)
• js - For any javascript package (disabled all typescript feature)

Using Typescript module in heft to build and compile typescript via TypescriptTask (source).

• tsconfig.json - tsconfig used for compile project
• typescript.json - custom typescript config used by heft for addition feature

This will generate output on multiple directories,

1. lib - a main directory contains compiled code.

• commonjs (.js) - compiled code using commonjs type.
• esmodule (.mjs) - compiled code using esmodule/es5 type.
• mapping (.js.map or .mjs.map) - file mapping for commonjs or esmodule.
• typings (.d.ts) - typescript definition created by tsc cli.

2. dist - a main typescript definition single file. it's separated to 4 files.

• index.d.ts is a aggregated type of a project.
• index-alpha.d.ts is a alpha-only type of a project.
• index-beta.d.ts is a beta-only type of a project.
• index-public.d.ts is a public-only type of a project.

3. lib-umd - a compiled [umd][umd-gh] code.

Using heft-jest-plugin module to configure jest. There are several config we overwritten to meet our need.

1. Enabled code coverage by default
2. Produce lcov report for analysis code coverage at sonarcloud
3. Produce html report for test result using jest-html-reporters
4. Produce junit report for test result using jest-junit