My expected result is for the image to move within the container according to the calculations made on the x-axis mouse position. That is why Xratio ranges from -1 to 1.
I am not sure what is the readonly property here?
I used console.log(typeof Xratio) and got "number".
I also used console.log(typeof easeOutExpo) and saw "function".
Could this be a simple mistake I am not understanding with assigning?
const bxImg = document.querySelector('.bx-pic');
document.addEventListener('mousemove', (e) => {
const xRatio = (e.clientX / window.innerWidth) * 2 - 1;
console.log(typeof xRatio);
const xRatioEased = 0;
if (xRatio >= 0) {
xRatioEased = easeOutExpo(xRatio);
} else {
xRatioEased = easeOutExpo(-xRatio * -1)
}
bxImg.style.transform = `scale(1.2) translate3D(${-xRatioEased * 10}px, ${0}, ${0})`;
})
function easeOutExpo(n) {
if (n === 1) {
return 1;
} else {
return 1 - Math.pow(2, -10 * n);
}
}
console.log(typeof easeOutExpo);html, body {
width: 100%;
height: 100%;
}
body {
background-color: #FDFDFD;
}
img {
width: 100%;
height: 100%;
object-fit: cover;
}
.bx-wp {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
overflow: hidden;
width: 350px;
height: 350px;
outline: 30px solid royalblue;
}
.bx {
position: relative;
transform: scale(1.2);
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="bx-wp">
<img src="https://images.unsplash.com/photo-1641113994135-a9f230b1f9b0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2670&q=80" alt="A Mountain" class="bx bx-pic">
</div>
<script src="script.js"></script>
</body>
</html>You've declared xRatioEased as a const, so it can only be set on initialisation. Replace const xRatioEased with let xRatioEased and it should all work.