Class: AvenxWatcher

AvenxWatcher(getter, callbackopt, optionsopt)

AvenxWatcher handles dependency tracking, caching, lazy/immediate callbacks, and lifecycle cleanup for reactive expressions.

Constructor

new AvenxWatcher(getter, callbackopt, optionsopt)

Parameters:
Name Type Attributes Default Description
getter function | Array:.<function()>

The reactive evaluation function.
callback function | null <optional>
 null

Callback triggered when evaluated value changes.
options object <optional>

Configuration options.

Properties
Name Type Attributes Description
immediate boolean <optional>

Run the callback immediately with initial value.
lazy boolean <optional>

Postpone the initial evaluation until first accessed.
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Classes

AvenxWatcher

Members

callback :function|null

Type:
  • function | null
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debounceTimer :any

Type:
  • any
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deps :Set:.<{target:: object:, key:: string:, watchersSet:: Set:.<AvenxWatcher:>}>

Type:
  • Set:.<{target:: object:, key:: string:, watchersSet:: Set:.<AvenxWatcher:>}>
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dirty :boolean

Type:
  • boolean
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getter :function|Array:.<function()>

Type:
  • function | Array:.<function()>
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isArray :boolean

Type:
  • boolean
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isEffect :boolean

Type:
  • boolean
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lastExecTime :number

Type:
  • number
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name :string

Type:
  • string
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options :object

Type:
  • object
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pendingNewValue :any

Type:
  • any
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pendingOldValue :any

Type:
  • any
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throttleTimer :any

Type:
  • any
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value :any

Type:
  • any
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Methods

addDep(target, key, watchersSet)

Registers a target property dependency on this watcher.

Parameters:
Name Type Description
target object

Reactive object target.
key string

Property key.
watchersSet Set:.<AvenxWatcher:>

Set mapping to this dependency.
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cleanupDeps(oldDeps)

Compares active dependencies against old dependencies and unsubscribes from stale dependencies.

Parameters:
Name Type Description
oldDeps Set:.<{target:: object:, key:: string:, watchersSet:: Set:.<AvenxWatcher:>}>
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evaluate() → {any}

Evaluates a lazy computed watcher if it is dirty.

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Returns:
Type
any

get() → {any}

Evaluates the getter function inside the watcher context to track reactive dependencies.

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Returns:
Type
any

pause()

Pauses watcher execution.

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resume()

Resumes watcher execution.

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run(newValue, oldValue)

Executes the watcher callback, applying debounce or throttle timing if configured.

Parameters:
Name Type Description
newValue any
oldValue any
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teardown()

Cleans up all registered dependencies of this watcher to prevent memory leaks.

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update()

Updates the watcher value and triggers evaluation or callback execution.

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