Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
SyncManager.getTags method of the
SyncManager interface returns a list of developer-defined identifiers for
Promise that resolves to an array of strings
containing developer-defined identifiers for
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