这是 question 的扩展.
我们得到了如下所示的结构,根据 score
类元素的值,我们添加了一个 win
或 lose
类.
<div class="war">
<div class="team">
<span class="score">8</span>
</div>
<div class="team">
<span class="score">5</span>
</div>
</div>
<div class="war">
<div class="team">
<span class="score">12</span>
</div>
<div class="team">
<span class="score">25</span>
</div>
</div>
<div class="war">
<div class="team">
<span class="score">57</span>
</div>
<div class="team">
<span class="score">57</span>
</div>
</div>
用户 Rory McCrossan 提供了一个可行的解决方案 https://stackoverflow.com/a/52757164/4236048
document.querySelectorAll('.war').forEach(function(war) {
var scores = Array.from(war.getElementsByClassName("score"));
var winIndex = scores.reduce((iMax, x, i, arr) => parseInt(x.innerText, 10) > parseInt(arr[iMax].innerText, 10) ? i : iMax, 0);
scores.forEach((score, i) => score.classList.add(winIndex == i ? 'win' : 'lose'));
});
但我没有考虑平局的情况,它的解决方案不再可行。
对于这个新场景中的逻辑有什么想法吗? .win
/.lose
/.draw
提前致谢
最佳答案
更新#2
比较 .war
项目内的分数并将类应用于 .score
项目
function applyScoreClass() {
$('.war').each(function(index, elem) {
var $elem = $(elem);
var warScores = [];
$elem.find('.score').each(function(i,el) {
var txt = $(el).text();
var num = (txt && txt.length > 0) ? parseInt(txt) : null;
if (num !== null) {
warScores.push({
elem: $(el),
score: num
});
}
});
if (warScores.length === 2) {
if (warScores[0].score > warScores[1].score) {
warScores[0].elem.addClass('win');
warScores[1].elem.addClass('lose');
} else if (warScores[0].score === warScores[1].score) {
warScores[0].elem.addClass('draw');
warScores[1].elem.addClass('draw');
} else if (warScores[0].score < warScores[1].score) {
warScores[1].elem.addClass('win');
warScores[0].elem.addClass('lose');
}
}
});
}
applyScoreClass();
.war {
border: 1px solid #d8d8d8;
}
.win {
color: green;
}
.draw {
color: orange;
}
.lose {
color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="war">
<div class="team">
<span class="score">8</span>
</div>
<div class="team">
<span class="score">5</span>
</div>
</div>
<div class="war">
<div class="team">
<span class="score">2</span>
</div>
<div class="team">
<span class="score">4</span>
</div>
</div>
关于javascript - 根据子 DOM 元素的值应用不同的类,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52870604/