javascript - How to prevent d3-brush from adding "display:none" to .selection and .handle onmousedown -


i noticed after brushing area using d3-brush, if click within brush's extent outside of selection, selection becomes invisible. closer inspection revealed svg rect elements .selectionand .handle given display: none property, in response mousedown event.

this jsfiddle minimal example of behaviour. drag select within white area, click white area outside of selection.

edit: ivan brought in comments, seems default behaviour empty selections.

how can prevent it? tried adding empty mousedown event listener .overlay, doesn't work.


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