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Replace the auto-generated READMEs in the different Angular DevTools submodules with brief descriptions. PR Close #45884
17 lines
1.1 KiB
Markdown
17 lines
1.1 KiB
Markdown
# Angular DevTools Communication Protocol
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Angular DevTools injects scripts in the user application page that interact with the framework debugging APIs. The injected scripts interact with the extension via message passing using a statically typed protocol.
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This subdirectory contains:
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- Declaration of a statically typed message bus
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- Implementation of priority aware message bus
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- Interfaces that declare the messages exchanged between the extension and the page
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We use the `PriorityAwareMessageBus` to ensure that certain messages have higher priority than others. Because of the asynchronous nature of the property exchange there's a risk that a message response may overwrite the result from a more recent response.
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An example is:
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1. We request the state of the component tree
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1. We update the state
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1. We request the state of the properties of a particular component
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We don't have guarantees that the response of 1. will arrive before the response of 3. Often the response of 1. is larger and might be delivered after 3. In such a case, it may contain the application state prior to the update and override the state update we received from 3.
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