WebSQL is a deprecated API designed for storing and managing data in client-side databases that can be queried using a variant of SQL. It was intended to allow web applications to store data locally in a structured manner, using SQL-like queries to interact with the data. The API enabled operations such as creating databases, opening transactions, creating tables, inserting and deleting values, and reading data[1][2].
WebSQL was not included in the HTML5 specification but was developed as a separate specification. It primarily relied on SQLite as its backend[3][5]. Despite its initial adoption in browsers like Google Chrome, Opera, and Android browsers, it was never implemented by all major browsers, such as Firefox, and was eventually deprecated by the World Wide Web Consortium (W3C) in 2010[3][5]. The W3C recommended that developers move towards using more modern technologies like IndexedDB, which is more robust and provides better features f...
