Access comprehensive technical details and troubleshooting tips for IndexedDB. Discover advanced usage patterns, resolve common database issues, and implement best practices for optimal performance.
Advanced Usage Patterns
Batch Operations
async function batchInsert(records) {
const tx = db.transaction('records', 'readwrite');
const store = tx.objectStore('records');
for (const record of records) {
await store.add(record);
}
await tx.complete;
}
Complex Queries
async function queryRecords(tableId, filters) {
const tx = db.transaction('records', 'readonly');
const store = tx.objectStore('records');
const index = store.index('tableId');
const records = await index.getAll(tableId);
return records.filter(record => {
return Object.entries(filters).every(([key, value]) =>
record.data[key] === value
);
});
}
Data Migration
async function migrateData(oldVersion, newVersion) {
const tx = db.transaction(['tables', 'columns', 'records'], 'readwrite');
if (oldVersion < 2) {
const store = tx.objectStore('records');
const records = await store.getAll();
for (const record of records) {
record.modified = new Date();
await store.put(record);
}
}
}
Troubleshooting Guide
Storage Quota Exceeded
Occurs when browser storage limits are reached.
Solution:
Check current usage with Storage API
Clean up old or unused data
Request additional quota if available
Export data to a file if needed
Version Mismatch
Occurs when database structure changes cause conflicts.
Solution:
Check the current database version
Run migration scripts to update the schema
Backup data before performing migrations
Verify data integrity after migration
Transaction Failures
Occurs when database operations fail to complete successfully.
Solution:
Check the error console for specific error messages
Verify the scope of the transaction
Ensure proper error handling in your code
Implement retry logic if necessary
Performance Issues
Occurs when database operations become slow or unresponsive.
Solution:
Use appropriate indexes to speed up queries
Batch operations when possible to reduce overhead
Optimize query patterns for efficiency
Monitor and limit the size of records
Best Practices
Data Validation
function validateRecord(record, columns) {
for (const column of columns) {
const value = record.data[column.id];
switch (column.type) {
case 'number':
if (isNaN(value)) return false;
break;
case 'date':
if (!isValidDate(value)) return false;
break;
// Add more validations as needed
}
}
return true;
}
Error Handling
async function safeOperation(operation) {
try {
await operation();
} catch (error) {
if (error.name === 'QuotaExceededError') {
// Handle storage quota error
} else if (error.name === 'VersionError') {
// Handle version mismatch
} else {
// Handle other errors
}
throw error;
}
}