Import maps

A <script type="importmap"> HTML element provides an import map as a JSON string. An import map controls how the browser should resolve module specifiers when importing JavaScript modules.

Baseline Status: Achieved Widely Available on Sep 27, 2025 (Cross-browser Newly Available since Mar 27, 2023).

Desktop Browser Engine Support

Google Chrome

89

Supported

Mozilla Firefox

108

Supported

Apple Safari

16.4

Supported

Microsoft Edge

89

Supported

Mobile Browser Engine Support

Chrome Android

89

Firefox Android

108

Safari iOS

16.4

Specifications and References

Specification ↗ Can I Use (import-maps) ↗ Feature XML ↗

MDN Browser Compat Data Keys:

html.elements.script.type.importmap ↗