css - 五星级组件 : How to get rid of all JavaScript code and replace it with only CSS?

Question

我构建了一个五星级的简单组件(用于排名)。该组件工作正常。我使用 JavaScript 来保存结果(当用户点击星标(此处未显示)时)。

我遇到的问题是我没有找到正确的方法 来模拟mouseover 事件(当您将鼠标悬停在星星上并在单击之前)。所以我使用 JavaScript 做到了。

是否有正确的方法仅使用 CSS 来实现此目的(而不是所有那些 JS 行)？

我正在分享我已经做过的事情。

document.getElementById('star1').addEventListener('mouseover', function(){
	this.classList.remove("fa-star-o");
	this.classList.add("fa-star");
});
document.getElementById('star1').addEventListener('mouseout', function(){
	this.classList.remove("fa-star");
	this.classList.add("fa-star-o");
});

document.getElementById('star2').addEventListener('mouseover', function(){
	this.classList.remove("fa-star-o");
	this.classList.add("fa-star");
	document.getElementById('star1').classList.remove("fa-star-o");
	document.getElementById('star1').classList.add("fa-star");
});
document.getElementById('star2').addEventListener('mouseout', function(){
	this.classList.remove("fa-star");
	this.classList.add("fa-star-o");
	document.getElementById('star1').classList.remove("fa-star");
	document.getElementById('star1').classList.add("fa-star-o");
});

document.getElementById('star3').addEventListener('mouseover', function(){
	this.classList.remove("fa-star-o");
	this.classList.add("fa-star");
	document.getElementById('star1').classList.remove("fa-star-o");
	document.getElementById('star1').classList.add("fa-star");
	document.getElementById('star2').classList.remove("fa-star-o");
	document.getElementById('star2').classList.add("fa-star");
});
document.getElementById('star3').addEventListener('mouseout', function(){
	this.classList.remove("fa-star");
	this.classList.add("fa-star-o");
	document.getElementById('star1').classList.remove("fa-star");
	document.getElementById('star1').classList.add("fa-star-o");
	document.getElementById('star2').classList.remove("fa-star");
	document.getElementById('star2').classList.add("fa-star-o");
});

document.getElementById('star4').addEventListener('mouseover', function(){
	this.classList.remove("fa-star-o");
	this.classList.add("fa-star");
	document.getElementById('star1').classList.remove("fa-star-o");
	document.getElementById('star1').classList.add("fa-star");
	document.getElementById('star2').classList.remove("fa-star-o");
	document.getElementById('star2').classList.add("fa-star");
	document.getElementById('star3').classList.remove("fa-star-o");
	document.getElementById('star3').classList.add("fa-star");
});
document.getElementById('star4').addEventListener('mouseout', function(){
	this.classList.remove("fa-star");
	this.classList.add("fa-star-o");
	document.getElementById('star1').classList.remove("fa-star");
	document.getElementById('star1').classList.add("fa-star-o");
	document.getElementById('star2').classList.remove("fa-star");
	document.getElementById('star2').classList.add("fa-star-o");
	document.getElementById('star3').classList.remove("fa-star");
	document.getElementById('star3').classList.add("fa-star-o");
});

document.getElementById('star5').addEventListener('mouseover', function(){
	this.classList.remove("fa-star-o");
	this.classList.add("fa-star");
	document.getElementById('star1').classList.remove("fa-star-o");
	document.getElementById('star1').classList.add("fa-star");
	document.getElementById('star2').classList.remove("fa-star-o");
	document.getElementById('star2').classList.add("fa-star");
	document.getElementById('star3').classList.remove("fa-star-o");
	document.getElementById('star3').classList.add("fa-star");
	document.getElementById('star4').classList.remove("fa-star-o");
	document.getElementById('star4').classList.add("fa-star");
});
document.getElementById('star5').addEventListener('mouseout', function(){
	this.classList.remove("fa-star");
	this.classList.add("fa-star-o");
	document.getElementById('star1').classList.remove("fa-star");
	document.getElementById('star1').classList.add("fa-star-o");
	document.getElementById('star2').classList.remove("fa-star");
	document.getElementById('star2').classList.add("fa-star-o");
	document.getElementById('star3').classList.remove("fa-star");
	document.getElementById('star3').classList.add("fa-star-o");
	document.getElementById('star4').classList.remove("fa-star");
	document.getElementById('star4').classList.add("fa-star-o");
});

.content > span > i{
    font-size: 50px;
    margin-right: 10px;
    color: #f0d124;
	cursor: pointer;
}
#star1:hover #star1{
	/*an example: I don't know what to do here???*/
}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<div class="content">
	<span><i id="star1" class="fa fa-star-o"></i></span>
	<span><i id="star2" class="fa fa-star-o"></i></span>
	<span><i id="star3" class="fa fa-star-o"></i></span>
	<span><i id="star4" class="fa fa-star-o"></i></span>
	<span><i id="star5" class="fa fa-star-o"></i></span>
</div>

Answer 1

这是使用您正在使用的 FontAwesome 的一种方法:

body {
  font-size: 44px;
}

.content {
  width: 200px;
  display: flex;
  flex-direction: row-reverse;
}

span:hover i:before,
span:hover~span i:before {
  content: "\f005";
}

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<div class="content">
  <span><i id="star1" class="fa fa-star-o"></i></span>
  <span><i id="star2" class="fa fa-star-o"></i></span>
  <span><i id="star3" class="fa fa-star-o"></i></span>
  <span><i id="star4" class="fa fa-star-o"></i></span>
  <span><i id="star5" class="fa fa-star-o"></i></span>
</div>

它有一些需要考虑的“限制”。它需要 flexbox反转元素渲染顺序，以便“~”选择器按预期工作。因此，在保存结果时生成 javascript 时请记住这一点。

Flexbox现在得到了很好的支持。