v133 · javascript

Import Map Conflict Resolver

Chrome 133 allows multiple <script type="importmap"> elements. When two maps define the same specifier, the first definition wins. This tool shows the merge result and highlights every conflict.

checking import maps…

Chrome 133 merge rule Later import maps extend earlier ones. If two maps define the same specifier, the first map's value is used — the later map's entry is silently ignored. This is the same as "first writer wins."

Edit the two import maps below (valid JSON imports objects) and click Resolve to see the merged result and any conflicts.

Import Map 1 first — wins on conflict

Import Map 2 second — extended

Merged import map

Specifier	Resolved URL	Source	Conflict?

Resulting JSON (as browser would see it)

Conflict summary