or can be used with where to filter records to include records where any of the condition is true.

Sql

Select * From Table_Name;
Where
Column1=some_value
or
Column2=some_another_value;

JsStore

var results = await connection.select({
    from: "Table_Name",
    where: {
        column1: some_value,
        or: {
            column2: some_another_value
        }
    }
});
//results will be array of objects.
console.log(results);

Example