MDN wants to talk to developers like you: https://qsurvey.mozilla.com/s3/a3e7b5301fea

coalesceduplicatearcs

coalesceduplicatearcs
Type: boolean
Valid on any element that has a datasources attribute. When multiple datasources are used, one may override an assertion from another. This attribute, if true, which is the default, allows a datasource to negate an earlier assertion.

Document Tags and Contributors

 Contributors to this page: Sheppy, Marsf, Mgjbot, Ptak82, Dria
 Last updated by: Sheppy,