What this page can do
Call fixed DBOPFS methods using validated table/key fields, parse JSON values, report results, inspect filenames, and confirm scoped destructive actions.
Structured browser lab
Practice with real OPFS.
Use named controls to write, read, inspect, and remove disposable records in the dbopfs-playground namespace. The page shows the equivalent JavaScript but never evaluates text as code.
Loading runtimeChecking browser capabilities…
Use disposable data only. Records remain on this device until cleared, evicted, or deleted through browser controls. GitHub project sites under thewizardnexus.github.io share one origin. This playground uses its own application-ID folder to avoid accidental data mixing, but another same-origin script could still access the origin's browser storage. See Application folders and same-origin apps.
Environment check
Browser capabilities
- Secure contextChecking
- OPFS rootChecking
- Persistence requestChecking
- CompressionStreamChecking
- DecompressionStreamChecking
- ImageBitmapChecking
- Web WorkerChecking
- Database singletonChecking
Operation result
Output
Waiting for the DBOPFS runtime.Current app scope
Storage tree
apps/dbopfs-playground
The tree will appear when the runtime is ready.
Equivalent JavaScript
await dbopfs.set(
'notes',
'welcome.json',
{
message:'Hello from DBOPFS',
source:'structured playground'
}
);What it cannot do
Run arbitrary JavaScript, access another origin, inspect server data, guarantee persistence, provide hostile-code isolation, or prove final 1.0.0 release readiness.