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The database connection has been closed explicitely, by calling db.close(), or it was opened with option {autoOpen: false} and was not yet called upon.

Sample using Promise.catch()

doSomeDatabaseWork().then(result => {
    // Success
}).catch('DatabaseClosedError', e => {
    // Failed with DatabaseClosedError
    console.error ("DatabaseClosed error: " + e.message);
}).catch(Error, e => {
    // Any other error derived from standard Error
    console.error ("Error: " + e.message);
}).catch(e => {
    // Other error such as a string was thrown
    console.error (e);

Sample: switch(

db.on('error', function (error) {
    switch ( {
        // errnames.DatabaseClosed ==="DatabaseClosedError"
        case Dexie.errnames.DatabaseClosed:
            console.error ("DatabaseClosed error");
            console.error ("error: " + e);


nameWill always be Dexie.errnames.DatabaseClosed === "DatabaseClosedError"
messageDetailed message
inner?Inner exception instance (if any)
stackCan be present if the error was thown. If signaled, there wont be any call stack.

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