我在一个网站上工作,我想在其中检查element是否包含任何内容。
以下是我的html代码。 仅在此处添加注释的地方应通过脚本添加opacity-pointseven
类。
<div class="featured-block">
<a href="/149553/" class="featured-block__item cf">
<div class="featured-block__item-inner">
<figure class="featured-block__image img-fit">
<img class="default-opacity" src="" srcset=""> // HERE default-opacity will added aocording to script
</figure>
<div class="featured-block__content">
<h1 style="margin-bottom:0px;" class="featured-block__title"></h1>
// No content
<h1 class="featured-block__tag"></h1>
// No content
</div>
</div>
</a>
<a href="/" class="featured-block__item cf">
<div class="featured-block__item-inner">
<figure class="featured-block__image img-fit">
<img src=""> // IT SHOULD BE ADDED HERE ONLY
</figure>
<div class="featured-block__content">
<h1 style="margin-bottom:0px;" class="featured-block__title">Trans Mountain Pipeline: NEB Releases New Report, Recommends Approval </h1>
<h1 class="featured-block__tag"> More Coverage</h1>
</div>
</div>
</a>
<a href="/" class="featured-block__item cf">
<div class="featured-block__item-inner">
<figure class="featured-block__image img-fit">
<img src=""> // IT SHOULD BE ADDED HERE ONLY
</figure>
<div class="featured-block__content">
<h1 style="margin-bottom:0px;" class="featured-block__title">Hello World</h1>
<h1 class="featured-block__tag"></h1>
</div>
</div>
</a>
<a href="/" class="featured-block__item cf">
<div class="featured-block__item-inner">
<figure class="featured-block__image img-fit">
<img src=""> // IT SHOULD BE ADDED HERE ONLY
</figure>
<div class="featured-block__content">
<h1 style="margin-bottom:0px;" class="featured-block__title"></h1>
<h1 class="featured-block__tag">Thank You</h1>
</div>
</div>
</a>
</div>
对于空元素,我正在通过以下方式进行检查:
<script>
jQuery(function($) {
$(".featured-block__item-inner").each(function() {
if ($(this).find(".featured-block__title").is(":empty") && $(this).find(".featured-block__tag").is(":empty")) {
$(this).find(".img-fit img").addClass("default-opacity");
}
});
})
</script>
问题陈述:
我想知道不为空的元素,我需要在上面的脚本中进行哪些更改。这就是我尝试过的。我使用的是is
而不是not
,但似乎不起作用。
<script>
jQuery(function ($) {
$(".featured-block__item-inner").each(function () {
if ($(this).find(".featured-block__title").is(":empty") && $(this).find(".featured-block__tag").is(":empty")) {
$(this).find(".img-fit img").addClass("default-opacity");
} else if ($(this).find(".featured-block__title").not(":empty") && $(this).find(".featured-block__tag").not(":empty")) {
$(this).find(".img-fit img").addClass("opacity-pointseven");
} else if ($(this).find(".featured-block__title").not(":empty") && $(this).find(".featured-block__tag").is(":empty")) {
$(this).find(".img-fit img").addClass("opacity-pointseven");
} else if ($(this).find(".featured-block__title").is(":empty") && $(this).find(".featured-block__tag").not(":empty")) {
$(this).find(".img-fit img").addClass("opacity-pointseven");
}
});
})
</script>
答案 0 :(得分:1)
为此,您使用.not(":empty")
答案 1 :(得分:0)
您要检查is not
是否为空-不要使用is
,只需使用not
:
jQuery(function($) {
$(".featured-block__item-inner").each(function() {
if ($(this).find(".featured-block__title").is(":empty") && $(this).find(".featured-block__tag").not(":empty")) {
$(this).find(".img-fit img").addClass("default-opacity");
}
});
})