React event onMouseLeave not triggered when moving cursor fast

seems to be an issue caused by event delegation when the event listener is on the parent element and child elements are being conditionally added/removed from the DOM. putting a “hover target” component that sits on top of everything should make this work properly, but could cause other issues if you need to click elements … Read more

How to open a WPF Popup when another control is clicked, using XAML markup only?

I did something simple, but it works. I used a typical ToggleButton, which I restyled as a textblock by changing its control template. Then I just bound the IsChecked property on the ToggleButton to the IsOpen property on the popup. Popup has some properties like StaysOpen that let you modify the closing behavior. The following … Read more

Setting a property with an EventTrigger

Just create your own action. namespace WpfUtil { using System.Reflection; using System.Windows; using System.Windows.Interactivity; /// <summary> /// Sets the designated property to the supplied value. TargetObject /// optionally designates the object on which to set the property. If /// TargetObject is not supplied then the property is set on the object /// to which the … Read more

Check if event exists on element [duplicate]

$(‘body’).click(function(){ alert(‘test’ )}) var foo = $.data( $(‘body’).get(0), ‘events’ ).click // you can query $.data( object, ‘events’ ) and get an object back, then see what events are attached to it. $.each( foo, function(i,o) { alert(i) // guid of the event alert(o) // the function definition of the event handler }); You can inspect by … Read more

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