Most input controls are top-level divs in HTML, with a descendent <input>. When the page first loads, e.g. when .OnInitialized of the control is triggered, the HTML control div has no children yet.
I would like to run some JavaScript when the descendent <input> is rendered onto the page.
@(Html.DevExtreme().SelectBox()
.ID("mycontrol")
.InputAttr("onload", "alert('loaded!')")
Even though inspect element reveals this kind of structure
<div id="mycontrol" ...>
...
<input onload="alert('loaded!')" aria-haspopup="listbox" role="combobox" ...>
The onload attribute is right there!
But the onload attribute never fires, the alert never triggers, no matter what javascript I put there it doesn't run.
So how can I run some javascript when the descendent <input> appears?
