# Frame Associated Task Types
Blink uses a series of task types defined in
[task_type.h](https://cs.chromium.org/chromium/src/third_party/blink/public/platform/task_type.h).
For each task type that can be frame-attributed, the table below indicates
whether the task queue associated with this task type can be paused, throttled,
frozen or deferred. All specified (in W3C, HTML, DOM, etc) task types are
pausable. Some internal task queues are not.
| Queue Type | Throttlable | Throttlable (intensive) | Deferrable | Freezable | Pausable | Virtual time |
|-----------------------------------|-------------|-------------------------|------------|-----------|----------|--------------|
| DOMManipulation | No | No | Yes | Yes | Yes | Yes |
| UserInteraction | No | No | No | Yes | Yes | Yes |
| Networking | No | No | Yes | Yes | Yes | No |
| NetworkingWithURLLoaderAnnotation | No | No | Yes | Yes | Yes | No |
| NetworkingControl | No | No | Yes | Yes | Yes | No |
| LowPriorityScriptExecution | No | No | Yes | Yes | Yes | No |
| HistoryTraversal | No | No | Yes | Yes | Yes | Yes |
| Embed | No | No | Yes | Yes | Yes | Yes |
| MediaElementEvent | No | No | No | Yes | Yes | Yes |
| CanvasBlobSerialization | No | No | Yes | Yes | Yes | Yes |
| Microtask | No | No | Yes | Yes | Yes | Yes |
| JavascriptTimerDelayedLowNesting | Yes | No [^1] | Yes | Yes | Yes | Yes |
| JavascriptTimerDelayedHighNesting | Yes | Yes [^2] | Yes | Yes | Yes | Yes |
| JavascriptTimerImmediate | No | No | Yes | Yes | Yes | Yes |
| RemoteEvent | No | No | Yes | Yes | Yes | Yes |
| WebSocket | No | No | Yes | Yes | Yes | Yes |
| PostedMessage | No | No | No | Yes | Yes | Yes |
| UnshippedPortMessage | No | No | Yes | Yes | Yes | Yes |
| FileReading | No | No | Yes | Yes | Yes | Yes |
| DatabaseAccess | No | No | No | Yes | Yes | Yes |
| Presentation | No | No | Yes | Yes | Yes | Yes |
| Sensor | No | No | Yes | Yes | Yes | Yes |
| PerformanceTimeline | No | No | Yes | Yes | Yes | Yes |
| WebGL | No | No | Yes | Yes | Yes | Yes |
| WebGPU | No | No | Yes | Yes | Yes | Yes |
| IdleTask | No | No | Yes | Yes | Yes | Yes |
| MiscPlatformAPI | No | No | Yes | Yes | Yes | Yes |
| WorkerAnimation | No | No | No | Yes | Yes | Yes |
| FontLoading | No | No | Yes | Yes | Yes | Yes |
| ApplicationLifeCycle | No | No | Yes | Yes | Yes | Yes |
| BackgroundFetch | No | No | Yes | Yes | Yes | Yes |
| Permission | No | No | Yes | Yes | Yes | Yes |
| ServiceWorkerClientMessage | No | No | No | Yes | Yes | Yes |
| WebLocks | No | No | No | No | No | Yes |
| WakeLock | No | No | Yes | Yes | Yes | Yes |
| Storage | No | No | Yes | Yes | Yes | Yes |
| MachineLearning | No | No | Yes | Yes | Yes | Yes |
| WebSchedulingPostedTask | Yes [^3] | Yes [^3] | Yes | Yes | Yes | Yes |
| InternalDefault | No | No | Yes | Yes | Yes | Yes |
| InternalLoading | No | No | Yes | Yes | Yes | No |
| InternalTest | No | No | No | No | No | Yes |
| InternalWebCrypto | No | No | No | Yes | Yes | Yes |
| InternalMedia | No | No | No | Yes | Yes | Yes |
| InternalMediaRealTime | No | No | No | Yes | Yes | Yes |
| InternalIPC | No | No | No | No | No | Yes |
| InternalUserInteraction | No | No | No | Yes | Yes | Yes |
| InternalInspector | No | No | No | No | No | No |
| InternalTranslation | Yes | No | Yes | Yes | Yes | Yes |
| InternalIntersectionObserver | No | No | No | Yes | Yes | Yes |
| InternalContentCapture | Yes | No | Yes | Yes | Yes | Yes |
| InternalNavigationAssociated | No | No | No | No | No | No |
| InternalFreezableIPC | No | No | No | Yes | No | No |
| InternalContinueScriptLoading | No | No | No | Yes | Yes | Yes |
| InternalPostMessageForwarding | No | No | No | No | Yes | Yes |
Internal Translation queue supports concept of it running only in the foreground. It is disabled if the page that owns it goes in background.
"Throttlable (Intensive)": Wake ups are limited to 1 per minute when the page
has been backgrounded for 5 minutes. See
[Chrome Platform Status entry](https://www.chromestatus.com/feature/4718288976216064).
[^1] "Yes" if the "IntensiveWakeUpThrottling" feature is enabled and the
"can_intensively_throttle_low_nesting_level" param is "true".
[^2] "No" if the "IntensiveWakeUpThrottling" feature is disabled.
[^3] "Yes" only for `scheduler.postTask()` tasks where delay > 0.
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