I have an issue with mouseleave. (React/Typescript/CSS/HTML project).

Situation

(see picture at the bottom)

I got two div elements

<>
   <div id="main">
   <div>
   <div id="onHover" style={{display: "none"}}>
   </div>
</>

and I got an svg on top of div main.

return(
<svg className="click-through" pointer-events="none" width={1560} height={262}>
     <VictoryChart
         style={{
             parent: { pointerEvents: 'none' }
         }}
     >
        <VictoryArea
            style={{
                parent: { border: '1px solid #ccc', pointerEvents: 'none' }
            }}
        />
     </VictoryChart>
</svg>
)

Goal:

• Upon hovering over div main, div onHover should be displayed next to div main
• Upon leaving div main, div onHover should disappear again.

The first goal is no issue, the second one is: Because of the svg, mouseleave is triggered too early.

The whole situation as a picture (The dotted white lines are from the svg which trigger mouseleave, the blue box would be div main):

For other reasons, the svg can't go behind div main. How can I make sure now that svg lines don't trigger mouseleave?

Further Information

• For the svg I'm using victory js to display graphs
• That svg has the property click through and pointer-events: none
• This situation is heavily simplified but explains my key problem

CodePudding user response：

Did you try to add pointer-events: none; to that SVG? Here is an example (green box does not fire any event but the blue one does):

const wrap = document.querySelector('.mouseleave');
wrap.addEventListener('mouseleave', () => {
  console.log(".mouseleave left");
});

.wrap {
  position: relative;
}
.mouseleave {
  height: 200px;
  border: 2px solid red;
}
.p-none, .p-default {
  height: calc(100% - 2rem);
  position: absolute;
  top: 1rem;
}
.p-none {
  pointer-events: none;
  border: 2px solid green;
  left: 1rem;
}
.p-default {
  border: 2px solid cyan;
  right: 1rem;
}

<div >
  <div ></div>
  <div >pointer events: none</div>
  <div >pointer events: default</div>
</div>

CodePudding user response：

the pointer-events: none property needs to be set in css

but the more modern(and very performant) way is to use a PointerEvent instead of MouseEvent and bind the event to the desired element.. that way all other element listeners dont fire at all..

element.setPointerCapture(ev.pointerId)