🏠 New in High Baseline Support: JavaScript modules in workers

December 6, 2025

caniuse · mdn · spec

The Worker() constructor accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in workers.

Source features

• api.Worker.Worker.ecmascript_modules [mdn]
• api.Worker.Worker.options_type_parameter [mdn]
• javascript.operators.import.worker_support [mdn]
• javascript.statements.import.worker_support [mdn]