摘自本教程，感谢上面的评论做了更正:

function getMousePos( canvas, evt ) {
    var rect = canvas.getBoundingClientRect();
    return {
        x: Math.floor( ( evt.clientX - rect.left ) / ( rect.right - rect.left ) * canvas.width ),
        y: Math.floor( ( evt.clientY - rect.top ) / ( rect.bottom - rect.top ) * canvas.height )
    };
}

在画布上使用如下:

var canvas = document.getElementById( 'myCanvas' );
canvas.addEventListener( 'mousemove', function( evt ) {
    var mousePos = getMousePos( canvas, evt );
} );

摘自本教程，感谢上面的评论做了更正:

function getMousePos( canvas, evt ) {
    var rect = canvas.getBoundingClientRect();
    return {
        x: Math.floor( ( evt.clientX - rect.left ) / ( rect.right - rect.left ) * canvas.width ),
        y: Math.floor( ( evt.clientY - rect.top ) / ( rect.bottom - rect.top ) * canvas.height )
    };
}

在画布上使用如下:

var canvas = document.getElementById( 'myCanvas' );
canvas.addEventListener( 'mousemove', function( evt ) {
    var mousePos = getMousePos( canvas, evt );
} );

基于@Spider的解决方案，我的非JQuery版本是这样的:

// Get the container element's bounding box
var sides = document.getElementById("container").getBoundingClientRect();

// Apply the mouse event listener
document.getElementById("canvas").onmousemove = (e) => {
  // Here 'self' is simply the current window's context
  var x = (e.clientX - sides.left) + self.pageXOffset;
  var y = (e.clientY - sides.top) + self.pageYOffset;
}

这适用于滚动和缩放(在这种情况下，有时它返回浮动)。

对于那些为移动设备和/或笔记本电脑/触摸屏显示器开发常规网站或PWAs(渐进式Web应用程序)的人来说，你可能已经登陆这里了，因为你可能已经习惯了鼠标事件，对触摸事件的痛苦体验还不熟悉……耶!

只有3条规则:

在鼠标移动或触摸移动事件期间尽可能少做。 在鼠标按下或触摸启动事件期间尽可能多地进行操作。 取消传播并防止触摸事件的默认值，以防止鼠标事件也在混合设备上触发。

不用说，触摸事件更复杂，因为可以有多个触摸事件，它们比鼠标事件更灵活(复杂)。这里我只讲一个触碰。是的，我很懒，但这是最常见的触摸方式。

var posTop; var posLeft; function handleMouseDown(evt) { var e = evt || window.event; // Because Firefox, etc. posTop = e.target.offsetTop; posLeft = e.target.offsetLeft; e.target.style.background = "red"; // The statement above would be better handled by CSS // but it's just an example of a generic visible indicator. } function handleMouseMove(evt) { var e = evt || window.event; var x = e.offsetX; // Wonderfully var y = e.offsetY; // Simple! e.target.innerHTML = "Mouse: " + x + ", " + y; if (posTop) e.target.innerHTML += "<br>" + (x + posLeft) + ", " + (y + posTop); } function handleMouseOut(evt) { var e = evt || window.event; e.target.innerHTML = ""; } function handleMouseUp(evt) { var e = evt || window.event; e.target.style.background = "yellow"; } function handleTouchStart(evt) { var e = evt || window.event; var rect = e.target.getBoundingClientRect(); posTop = rect.top; posLeft = rect.left; e.target.style.background = "green"; e.preventDefault(); // Unnecessary if using Vue.js e.stopPropagation(); // Same deal here } function handleTouchMove(evt) { var e = evt || window.event; var pageX = e.touches[0].clientX; // Touches are page-relative var pageY = e.touches[0].clientY; // not target-relative var x = pageX - posLeft; var y = pageY - posTop; e.target.innerHTML = "Touch: " + x + ", " + y; e.target.innerHTML += "<br>" + pageX + ", " + pageY; e.preventDefault(); e.stopPropagation(); } function handleTouchEnd(evt) { var e = evt || window.event; e.target.style.background = "yellow"; // Yes, I'm being lazy and doing the same as mouseout here // but obviously you could do something different if needed. e.preventDefault(); e.stopPropagation(); } div { background: yellow; height: 100px; left: 50px; position: absolute; top: 80px; user-select: none; /* Disable text selection */ -ms-user-select: none; width: 100px; } <div onmousedown="handleMouseDown()" onmousemove="handleMouseMove()" onmouseout="handleMouseOut()" onmouseup="handleMouseUp()" ontouchstart="handleTouchStart()" ontouchmove="handleTouchMove()" ontouchend="handleTouchEnd()"> </div> Move over box for coordinates relative to top left of box.<br> Hold mouse down or touch to change color.<br> Drag to turn on coordinates relative to top left of page.

更喜欢使用Vue.js?我做!然后你的HTML看起来是这样的:

<div @mousedown="handleMouseDown"
     @mousemove="handleMouseMove"
     @mouseup="handleMouseUp"
     @touchstart.stop.prevent="handleTouchStart"
     @touchmove.stop.prevent="handleTouchMove"
     @touchend.stop.prevent="handleTouchEnd">

在纯javascript中没有答案，当reference元素嵌套在其他可以具有绝对定位的元素中时，返回相对坐标。下面是针对这种情况的解决方案:

function getRelativeCoordinates (event, referenceElement) {

  const position = {
    x: event.pageX,
    y: event.pageY
  };

  const offset = {
    left: referenceElement.offsetLeft,
    top: referenceElement.offsetTop
  };

  let reference = referenceElement.offsetParent;

  while(reference){
    offset.left += reference.offsetLeft;
    offset.top += reference.offsetTop;
    reference = reference.offsetParent;
  }

  return { 
    x: position.x - offset.left,
    y: position.y - offset.top,
  }; 

}

你可以使用相对父类的getBoudingClientRect()。

document.addEventListener("mousemove", (e) => {
  let xCoord = e.clientX - e.target.getBoundingClientRect().left + e.offsetX
  let yCoord = e.clientY - e.target.getBoundingClientRect().top + e.offsetY
  console.log("xCoord", xCoord, "yCoord", yCoord)
})