lib.format#

• Type: 'esm' | 'cjs' | 'umd' | 'mf'
• Default: undefined
• Required: true

Specify the output format for the generated JavaScript output files.

For different output formats, Rslib uses the following default value of output.library.type provided by Rspack:

• esm：modern-module
• cjs：commonjs-static
• umd：umd

See Output Format and Module Federation for more details.