Nope. Indexeddb is a key value database with indexes only on fields (no computer indexes), that may be backed by sqlite in some browsers, and levelDB in others.

Nope. Indexeddb is a key value database with indexes only on fields (no computer indexes), that may be backed by sqlite in some browsers, and levelDB in others. webSQL is gone as no-one wanted to build another sql standard and implementation just for browsers, they just wanted to use sqlite. You can however implement a full text algorithm such as tf-idf atop indexedDB. It had reasonable performance when I made a toy version and fed Shakespeare's plays in as a corpus. Fun way to learn about stemming and building queries.