多个fa-heart像计数递增和递减
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我需要在第二次点击时增加点击和减量的fa-heart值的计数。
问题是我在同一页面中有多个fa-heart，因此无法增加/减少所点击的fa-heart。
这是我的小提琴
https://jsfiddle.net/mehbub/d9e2qotg/1/
(function() {
const heart = document.getElementById('heart');
heart.addEventListener('click', function() {
heart.classList.toggle('red');
});
})();
$(document).on('click', ".notliked", function() {
var $this = $(this);
$this.removeClass('notliked');
$this.addClass('liked')
$count = $('.likes-count');
$count.text(function(idx, txt) {
return (+txt == 0) ? 0 : (+txt - 1);
heart.classList.toggle('grey');
});
});
$(document).on('click', ".liked", function() {
var $this = $(this);
$this.removeClass('liked');
$this.addClass('notliked');
$count = $('.likes-count');
$count.text(function(idx, txt) {
return +txt + 1;
heart.classList.toggle('red');
});
});
$count.text(function(idx, txt) {
// convert text to number and increment by one
return +txt + 1;
});#heart {
color: grey;
font-size: 20px;
}
#heart.red {
color: red;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<p>
robert stephen</p><i class="fa fa-heart liked heart" id="heart" value="1" ></i>
<span class="likes-count"> 100 </span><br>
<p>
James Camroon</p>
<i class="fa fa-heart liked heart" id="heart" value="1" ></i>
<span class="likes-count"> 101 </span><br>
<p>
John Wick</p>
<i class="fa fa-heart liked heart" id="heart" value="1" ></i>
<span class="likes-count"> 37 </span><br>
<p>
James Bond</p>
<i class="fa fa-heart liked heart" id="heart" value="1" ></i>
<span class="likes-count"> 22 </span><br>
<p>
Avengers</p>
<i class="fa fa-heart liked heart" id="heart" value="1" ></i>
<span class="likes-count"> 90 </span>我需要为每个fa-heart单独增加/减少单击增量/减量，如果增量则变为红色，如果减少则变为灰色
谢谢
答案
你应该删除重复的id heart或者删除它，因为你已经有一个类heart然后将点击附加到这个公共类并切换类liked/notliked，你可以使用这些类作为CSS中的规则，所以不需要red/grey类， 就像是 ：
$(document).on('click', ".heart", function() {
var count = $(this).next('span');
$(this).toggleClass('notliked liked');
if ($(this).hasClass('liked')) {
count.text(Number(count.text()) + 1);
} else {
count.text(Number(count.text()) - 1);
}
});.heart.notliked {
color: grey;
font-size: 20px;
}
.heart.liked {
color: red;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<p>robert stephen</p>
<i class="fa fa-heart liked heart" value="1"></i>
<span class="likes-count"> 100 </span><br>
<p>James Camroon</p>
<i class="fa fa-heart liked heart" value="1"></i>
<span class="likes-count"> 101 </span><br>
<p>John Wick</p>
<i class="fa fa-heart liked heart" value="1"></i>
<span class="likes-count"> 37 </span><br>
<p>James Bond</p>
<i class="fa fa-heart liked heart" value="1"></i>
<span class="likes-count"> 22 </span><br>
<p>Avengers</p>
<i class="fa fa-heart liked heart" value="1"></i>
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