So how can we get the mouse position from a mouse event? Getting the current X and Y coordinates from an event To get the current mouse position we are going to trigger a mouse event. In this case we will use ‘mousemove’ to log the current X and Y coordinates of the mouse to the...
//onmousedownlet shiftX =event.clientX -ball.getBoundingClientRect().left; let shiftY=event.clientY - ball.getBoundingClientRect().top; 然后,在拖动球时,我们将鼠标指针相对于球的这个偏移也考虑在内,像这样: //onmousemove//球具有 position: absoluteball.style.left =event.pageX - shiftX +'px'...
在DOM2.0中,W3C对鼠标事件作了现范,鼠标事件被解析为MouseEvent(我们可以用e.constructor == MouseEvent来判断其是否为鼠标事件,是左键点击还是右键点击由它的一个叫button的属性判定。以下就是W3C的标准现范:1:按下左键 2:按下中键 3:按下右键当然微软是不会妥协的,因为e.button本来就是微软最先实现的,...
JavaScript鼠标点击按钮控件 javascript 鼠标,javascript的鼠标事件是个比较庞大的家族。常见的有以下8个:mousedown:鼠标的键钮被按下。mouseup:鼠标的键钮被释放弹起。click:单击鼠标的键钮。dblclick:鼠标的键钮被按下。contextmenu:弹出右键菜单。mouseover:鼠标
yPosition += (el.offsetTop - el.scrollTop + el.clientTop); } el = el.offsetParent; } return{ x: xPosition, y: yPosition }; } To get the position of all the elements between what you clicked on and the document, you have thegetPositionfunction. This function provides you with the...
To detect the mouse move, we have usedonmousemoveEvent so that whenever we move our mouse, we get the position of the pointer. Depending on the mouse position, we set the CSS margin to the red ball. Now the code is ready to test and you can run it on your browser. You can see th...
onmousemove = null } 案例三:自定义右键菜单 css部分: *{ margin:0; padding:0; } ul{ list-style: none; width: 200px; padding:10px; border:1px solid black; display: none; position: absolute; } ul li:hover{ background:skyblue; } 1111 2222 3333 js部分: document.addEventListe...
p4.ssl.qhimg.com/t01331ac159b58f5478.jpg"/>// 轮播图类 里面封装一些apiclassSlider{constructor(id){this.container=document.getElementById(id);this.items=this.container.querySelectorAll(".slider-list__item, .slider-list__item--selected");}// 获取选中的图片元素getSelectedItem(){constselected...
canvas.onmousemove = function(e) { var mouseX, mouseY; if(e.offsetX) { mouseX = e.offsetX; mouseY = e.offsetY; } else if(e.layerX) { mouseX = e.layerX; mouseY = e.layerY; } var c = ctx.getImageData(mouseX, mouseY, 1, 1).data; ...
Description The following code shows how to get mouse position. Example A Simple Pagefunction clicked()<!--fromwww.java2s.com-->{document.writeln("You clicked at the coordinates: X = "+ event.x +" Y = "+ event.y); } Click to view the demo The code above generates the following...