Function: onChildAttachedTo()

function onChildAttachedTo(
   target, 
   fn, 
   options?
): (runDetachDisposers) => void;

Runs a callback everytime a new object is attached to a given node. The callback can optionally return a disposer which will be run when the child is detached.

The optional options parameter accepts an object with the following options:

• deep: boolean (default: false) - true if the callback should be run for all children deeply or false if it it should only run for shallow children.
• fireForCurrentChildren: boolean (default: true) - true if the callback should be immediately called for currently attached children, false if only for future attachments.

Returns a disposer, which has a boolean parameter which should be true if pending detachment callbacks should be run or false otherwise.

Parameters

Parameter	Type	Description
target	() => object	Function that returns the object whose children should be tracked.
fn	(child) => void | (() => void)	Callback called when a child is attached to the target object.
options?	{ deep?: boolean; fireForCurrentChildren?: boolean; }	-
options.deep?	boolean	-
options.fireForCurrentChildren?	boolean	-

Returns

(runDetachDisposers) => void