Hook system for filters and actions in JavaScript.

Filters

addFilter( hookName, namespace, callback, priority? )

Registers a filter.

• hookName string
• namespace string (unique key)
• callback( value, ...args )
• priority number (default 10)

applyFilters( hookName, value, ...args )

Applies filters to a value. Returns the filtered value.

removeFilter( hookName, namespace )

Removes a previously registered filter.

Actions

addAction( hookName, namespace, callback, priority? )

Registers an action.

• callback( ...args )

doAction( hookName, ...args )

Runs all callbacks for an action.

removeAction( hookName, namespace )

Removes a previously registered action.

Utilities

• hasFilter( hookName, namespace? )
• hasAction( hookName, namespace? )