OnChange

Observables

Listen to an observable’s Changed. Argument is the new .Value.

Syntax

name.OnChange(fn);

Parameters

Name	Type	Description
fn	func	func (T newValue) { }.

Return value

A connection.

Luau emit

name.Changed:Connect(fn)

Description

Only for observable T. For arbitrary Instance properties use GetPropertyChangedSignal.

Example

observable int coins = 100;
coins.OnChange(func (int newValue) {
    post("now " .: newValue);
});

Emits:

coins.Changed:Connect(function(newValue: number)
  print("now " .. newValue)
end)

See also

observable · GetPropertyChangedSignal