I really don't get why the p element is always hidden (and therefore why the mouseout is always firing):
const canvas = document.querySelector("canvas");
const infoBox = document.querySelector("#info-box")
canvas.addEventListener("mousemove", evt => {
evt.preventDefault()
infoBox.style.display="block"
infoBox.style.position="absolute"
infoBox.style.top= evt.clientY+"px"
infoBox.style.left=evt.clientX+"px"
console.log("moved")
})
canvas.addEventListener("mouseout", evt => {
evt.preventDefault()
infoBox.style.display="none"
console.log("exit")
}, false)canvas{
border-width: 0px;
border-color:#212121;
background-color: blue;
}<canvas></canvas>
<div id="info-box" style="display: none;"><p>Hello</p></div>The exit happens every time the info-box appears.
Adding an offset to the #info-box div means that the mouse doesn't think it has left the canvas.
const canvas = document.querySelector("canvas");
const infoBox = document.querySelector("#info-box");
const mouseOffset = 2;
canvas.addEventListener("mousemove", evt => {
evt.preventDefault()
infoBox.style.display = "block"
infoBox.style.position = "absolute"
infoBox.style.top = evt.clientY + mouseOffset + "px" // add an offset here
infoBox.style.left = evt.clientX + mouseOffset + "px" // and here
console.log("moved")
})
canvas.addEventListener("mouseout", evt => {
evt.preventDefault()
infoBox.style.display = "none"
console.log("exit")
}, false)canvas {
border-width: 0px;
border-color: #212121;
background-color: blue;
}<canvas></canvas>
<div id="info-box" style="display: none;">
<p>Hello</p>
</div>