Eui: EuiComboBox - onBlur callback is invoked when the element focused

[maryia-lapata]

EuiComboBox's onBlur event doesn’t seem to work correctly. OnBlur callback is invoked when input tag misses the focus, where input tag is 2 px wide, when nothing was typed. So when I click on empty or filled combo, onBlur event is triggered, and it'd difficult to handle properly when EuiComboBox is touched in the form.

[chandlerprall]

What do you want to trigger via onBlur? It was a recent addition to the component with the intention to be used very sparingly, it's likely your use case is covered by another feature.

For sure though, there _is_ a bug causing onBlur to fire and completely inappropriate times (as your gif definitely shows). ~However, cleaning up that bug doesn't completely remove the unintuitiveness of when onBlur fires, e.g. clicking to select on option triggers the onBlur~ edit: no longer the case, given the proposed PR

[chandlerprall]

@zumwalt was there a necessity in #1400 to have the onBlur prop trigger when _explicitly the combo box input_ loses focus vs. the whole combo box component?

[zumwalt]

Input seemed to make sense at the time, but the primary goal of that PR was to expose onBlur — if the event is triggered by the input's parent element, that should work for us as well. A change here shouldn't break anything for us.

[maryia-lapata]

@chandlerprall I suppose that onBlur event will be triggered when the whole EUIComboBox component loses focus, rather than only the input tag inside the EUIComboBox.

it's likely your use case is covered by another feature

By "another feature" do you mean a feature of EUIComboBox component or some approach not related to EUIComboBox?

[chandlerprall]

I meant by something within EuiComboBox itself - usually the blurring of this component isn't as useful as watching the onChange event. However, #1739 is merged in with the fix for the onBlur callback and we'll get that out soon.

[chandlerprall]

@maryia-lapata the onBlur fix has landed in Kibana master and 7.x branches

[maryia-lapata]

@chandlerprall I appreciate it so much. It works like a charm 👍