这是可能的,但这是一项困难且需要大量 javascript 的任务。我会首先让你的 css 依赖于 javascript 控制的属性而不是原生 css 属性:
代替:
.button:hover {
/* fancy hover effects */
}
.button:active {
/* fancy activation effects */
}
切换到
.button.hover { /* Note: no longer using the :hover pseudo-class */
/* fancy hover effects */
}
.button.active {
/* fancy activation effects */
}
这是一个开始。它将让您通过自定义逻辑而不是原生 CSS 对 DOM 操作做出反应。这是必要的,因为无法在您的模糊层上激活原生 CSS 效果。
现在您需要手动添加和删除这些自定义.hover、.active 类:
var buttons = document.getElementsByTagName('button');
for (var i = 0; i < buttons.length; i++) {
// Add `.hover` class on hover start
buttons[i].onmouseover = function(button) {
this.classList.add('hover');
}.bind(buttons[i]);
// Remove `.hover` class on hover end
buttons[i].onmouseout = function(button) {
this.classList.remove('hover');
}.bind(buttons[i]);
// Add `.active` class on mouse down
buttons[i].onmousedown = function(button) {
this.classList.add('active');
}.bind(buttons[i]);
// Remove `.active` class on mouse up
buttons[i].onmouseup = function() {
this.classList.remove('active');
}.bind(buttons[i]);
}
好的,这足以使您的原始图层通过自定义事件进行控制。但是现在我们需要添加模糊层。我们可以实现一些自定义的深度克隆。我们希望这是自定义的,因为在克隆时,我们希望能够执行自定义操作(添加事件)。
var customCloneNode = function(node) {
var cloned = node.cloneNode(false); /* DON'T clone children; we'll do it manually */
// In a moment we'll do some custom logic with `cloned`
var childNodes = node.childNodes;
for (var i = 0; i < childNodes.length; i++)
cloned.appendChild(customCloneNode(childNodes[i]));
return cloned;
};
所以我们知道如何模拟 css 事件,并克隆 html 节点。现在我们需要将两者结合起来,以便克隆的子元素在原始相应元素获得/丢失时获得和丢失自定义 css 类:
var cloneNodeWithLinkedEvents = function(node) {
var cloned = node.cloneNode(false); /* DON'T clone children */
// Here's the custom logic:
node.onmouseover = function(parallelNode) {
// Add a "hover" class to the original node AND the cloned one!
this.classList.add('hover');
parallelNode.classList.add('hover');
}.bind(node, cloned);
node.onmouseout = function(parallelNode) {
this.classList.remove('hover');
parallelNode.classList.remove('hover');
}.bind(node, cloned);
// Note: For brevity I've only added the hover event here.
// It will be important to add the active event, as well as
// any value changes in input elements, etc.
var childNodes = node.childNodes;
for (var i = 0; i < childNodes.length; i++)
cloned.appendChild(cloneNodeWithLinkedEvents(childNodes[i]));
return cloned;
};
现在我们可以从原始元素中复制一个元素:
var originalElem = document.getElementByClassName('ui')[0];
var parallelElem = cloneNodeWithLinkedEvents(originalElem);
// Add the cloned node to the same parent which is holding `originalElem`
originalElem.parentNode.appendChild(parallelElem);
// Give the parallel node a unique class so we can style it:
parallelElem.classList.add('duplicate');
现在为重复元素设置样式:
.ui.duplicate {
left: -10px;
top: -5px;
opacity: 0.3;
z-index: 2; /* Or whatever value is necessary to make it appear on top */
}
工作示例:
window.onload = function() {
var cloneNodeWithLinkedEvents = function(node) {
var cloned = node.cloneNode(false); /* DON'T clone children */
if (node.classList && node.classList.contains('button')) {
// Here's the custom logic for buttons:
node.onmouseover = function(parallelNode) {
this.classList.add('hover');
parallelNode.classList.add('hover');
}.bind(node, cloned);
node.onmouseout = function(parallelNode) {
this.classList.remove('hover');
parallelNode.classList.remove('hover');
}.bind(node, cloned);
}
if (node.nodeName === 'INPUT') {
var changeFunc = function(parallelNode) {
parallelNode.value = this.value;
}.bind(node, cloned);
node.addEventListener('input', changeFunc);
node.addEventListener('keyup', changeFunc);
node.addEventListener('keydown', changeFunc);
}
// Note: For brevity I've only added the hover event here.
// It will be important to add the active event, as well as
// any value changes in input elements, etc.
var childNodes = node.childNodes;
for (var i = 0; i < childNodes .length; i++) {
cloned.appendChild(cloneNodeWithLinkedEvents(childNodes[i]));
}
return cloned;
};
var originalElem = document.getElementsByClassName('ui')[0];
var parallelElem = cloneNodeWithLinkedEvents(originalElem);
originalElem.parentNode.appendChild(parallelElem);
parallelElem.classList.add('duplicate');
};
.ui {
position: absolute;
left: 0; top: 0;
width: 100%; height: 100%;
background-color: rgba(0, 0, 0, 0.5);
box-shadow: inset 0 0 0 3px #000000;
}
.ui .button {
position: absolute;
width: 100px;
height: 30px; line-height: 30px;
margin-left: -51px; margin-top: -16px;
text-align: center;
background-color: #ffffff;
font-family: monospace;
border: 2px dotted #ff0000;
background-color: #800000;
color: #ffffff;
transition: background-color 300ms linear;
}
.ui .button.hover {
background-color: #808080;
}
.ui .button1 { left: 20%; top: 20%; }
.ui .button2 { left: 50%; top: 20%; }
.ui .button3 { left: 80%; top: 20%; }
.ui .decoration {
position: absolute;
left: 30%; top: 30%;
width: 40%; height: 5%;
background-color: #5050ff;
}
.ui .text {
position: absolute;
left: 5%; top: 38%;
width: 90%;
color: #6060df;
}
.ui input {
position: absolute;
width: 200px; height: 30px; line-height: 30px;
left: 10%; top: 70%;
color: #00ff00;
}
.ui {
opacity: 1;
z-index: 1;
}
.ui.duplicate {
left: -10px; top: -5px;
pointer-events: none !important;
opacity: 0.7;
z-index: 2;
filter: hue-rotate(60deg);
}
<div class="ui">
<div class="button button1">BUTTON1</div>
<div class="button button2">BUTTON2</div>
<div class="button button3">BUTTON3</div>
<div class="decoration"></div>
<div class="text">
Some text haha wheeee yayyy<br/>
Some text haha wheeee yayyy<br/>
Some text haha wheeee yayyy<br/>
</div>
<input type="text"/>
</div>
请注意,将鼠标悬停在复制图层上不会激活任何悬停效果,而将鼠标悬停在原始图层上会同时激活两者的效果!另外,请注意,输入 input 元素会将值更改事件链接到副本。