JSFiddle - React, Tailwind, and code Playground
HTML
<div class="container">
<div id="follower"></div>
</div>
<div class="container2">
<div id="follower2"></div>
</div>
CSS
#follower{
position : relative;
background-color : yellow;
width:30px;
height:30px;
border-radius:50px;
}
.container
{
width:150px;
height:150px;
position:absolute;
top:0;
left:0;
overflow:hidden;
border:1px solid #000000;
border-radius:500px;
}
#follower2{
position : relative;
background-color : red;
width:50px;
height:50px;
border-radius:50px;
}
.container2
{
width:150px;
height:150px;
position:absolute;
top:200px;
left:200px;
overflow:hidden;
border:1px solid #000000;
border-radius:500px;
}
JavaScript
// first circle variables
var center = {
x: $(".container").width()/2 - 15,
y: $(".container").height()/2 - 15
};
var distanceThreshold = $(".container").width()/2 - 15;
var mouseX = 0, mouseY = 0;
// second circle variables
var center2 = {
x2: $(".container2").width()/2 - 25,
y2: $(".container2").height()/2 - 25
};
var distanceThreshold2 = $(".container2").width()/2 - 25;
var mouseX2 = 0, mouseY2 = 0;
$(window).mousemove(function(e){
var d = {
x: e.pageX - center.x,
y: e.pageY - center.y
};
var distance = Math.sqrt(d.x*d.x + d.y*d.y);
if (distance < distanceThreshold) {
mouseX = e.pageX;
mouseY = e.pageY;
} else {
mouseX = d.x / distance * distanceThreshold + center.x;
mouseY = d.y / distance * distanceThreshold + center.y;
}
var d2 = {
x2: e.pageX - 200 - center2.x2,
y2: e.pageY - 200 - center2.y2
};
var distance2 = Math.sqrt(d2.x2*d2.x2 + d2.y2*d2.y2);
if (distance2 < distanceThreshold2) {
mouseX2 = e.pageX - 200;
mouseY2 = e.pageY - 200;
} else {
mouseX2 = d2.x2 / distance2 * distanceThreshold2 + center2.x2;
mouseY2 = d2.y2 / distance2 * distanceThreshold2 + center2.y2;
}
});
// cache the selector
var follower = $("#follower");
var xp = 0, yp = 0;
var loop = setInterval(function(){
// change 12 to alter damping higher is slower
xp += (mouseX - xp) / 2;
yp += (mouseY - yp) / 2;
follower.css({left:xp, top:yp});
}, 30);
// cache the selector
var follower2 = $("#follower2");
var xp2 = 0, yp2 = 0;
var loop2 = setInterval(function(){
// change 12 to alter damping higher is slower
xp2 += (mouseX2 - xp2) / 2;
yp2 += (mouseY2 - yp2) / 2;
follower2.css({left:xp2, top:yp2});
}, 30);