Dependent options not always loaded on first change

[gesinn-it-wam]

Setup

• MW version: 1.35.5
• SMW version: 4.0.0
• SFS version: 4.0.0-beta
• PF version: 5.3.4

Issue

After selecting a PF element from input type combobox the options for a dependent SFS element are not always loaded on first change; instead you have to select a different element first and another change will fill the options

[gesinn-it-wam]

This seems to be depending on how you select the value. The combobox is based on the OOUI ComboBoxInputWidget which seems to fire a change event after selecting an option only if there has been typed into the corresponding input field; that is, using only the arrow keys or the mouse to select an option does not fire the change event. (And therefore SFS is not informed to update the options.)

One can try this here: https://doc.wikimedia.org/oojs-ui/master/demos/?page=widgets&theme=wikimediaui&direction=ltr&platform=desktop#demo-section-comboBox

Execute the following code in the JavaScript console

$('body').change(event => console.log({change : event.target, val: $(event.target).val()}));
$('body').focusout(event => console.log({focusout : event.target, val: $(event.target).val()}));

and watch the output:

• Using only the mouse or the arrow keys in the select process, after leaving the combobox only the focusout is fired
• Having typed anything to the input field before selecting, also the change event is fired