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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
html,
body {
width: 100%;
height: 100%;
font-family: "Open Sans", sans-serif;
padding: 0;
margin: 0;
}
#context-menu {
position: fixed;
z-index: 10000;
width: 150px;
background: #1b1a1a;
border-radius: 5px;
transform: scale(0);
transform-origin: top left;
}
#context-menu.visible {
transform: scale(1);
transition: transform 200ms ease-in-out;
}
#context-menu .item {
padding: 8px 10px;
font-size: 15px;
color: #eee;
cursor: pointer;
border-radius: inherit;
}
#context-menu .item:hover {
background: #343434;
}
</style>
</head>
<body>
<div id="context-menu">
<div class="item">Option 1</div>
<div class="item">Option 2</div>
<div class="item">Option 3</div>
<div class="item">Option 4</div>
<div class="item">Option 5</div>
</div>
<script>
const contextMenu = document.getElementById("context-menu");
const scope = document.querySelector("body");
const normalizePozition = (mouseX, mouseY) => {
// ? compute what is the mouse position relative to the container element (scope)
let {
left: scopeOffsetX,
top: scopeOffsetY,
} = scope.getBoundingClientRect();
scopeOffsetX = scopeOffsetX < 0 ? 0 : scopeOffsetX;
scopeOffsetY = scopeOffsetY < 0 ? 0 : scopeOffsetY;
const scopeX = mouseX - scopeOffsetX;
const scopeY = mouseY - scopeOffsetY;
// ? check if the element will go out of bounds
const outOfBoundsOnX =
scopeX + contextMenu.clientWidth > scope.clientWidth;
const outOfBoundsOnY =
scopeY + contextMenu.clientHeight > scope.clientHeight;
let normalizedX = mouseX;
let normalizedY = mouseY;
// ? normalize on X
if (outOfBoundsOnX) {
normalizedX =
scopeOffsetX + scope.clientWidth - contextMenu.clientWidth;
}
// ? normalize on Y
if (outOfBoundsOnY) {
normalizedY =
scopeOffsetY + scope.clientHeight - contextMenu.clientHeight;
}
return { normalizedX, normalizedY };
};
scope.addEventListener("contextmenu", (event) => {
event.preventDefault();
const { clientX: mouseX, clientY: mouseY } = event;
const { normalizedX, normalizedY } = normalizePozition(mouseX, mouseY);
contextMenu.classList.remove("visible");
contextMenu.style.top = `${normalizedY}px`;
contextMenu.style.left = `${normalizedX}px`;
setTimeout(() => {
contextMenu.classList.add("visible");
});
});
scope.addEventListener("click", (e) => {
// ? close the menu if the user clicks outside of it
if (e.target.offsetParent != contextMenu) {
contextMenu.classList.remove("visible");
}
});
</script>
</body>
</html>