javascript – 如何按类获取上一个相邻元素？

页面中有几个带有文章文本的元素,但我想抓住位于共享按钮上方的那个元素.
html看起来像这样：

<div class="article-text">
 This is not intended to be grabbed
</div>

<div class="article-text">
  Text to be grabed
</div>

<a href="https://twitter.com/intent/tweet?source=http%3A%2F%2Fmysite.com&text=:%20http%3A%2F%2Fmysite.com&via=mySite" target="_blank" title="Tweet" onclick="window.open('https://twitter.com/intent/tweet?text=' + encodeURIComponent(document.title) + ':%20'  + encodeURIComponent(document.URL) + ' ' +encodeURIComponent(document.getElementsByClassName('article-text').prevIoUsSibling)); return false;">

<div class="article-text">
 This is not intended to be grabbed
</div>

这返回undefined.我也尝试过document.getElementsByClassName(‘article-text’)[0],但是它会抓取页面网址.所以我很无能为力,感谢你的帮助.

解决方法

你可以使用this.prevIoUsElementSibling,.textContent,.trim()

encodeURIComponent(this.prevIoUsElementSibling.textContent.trim())

<div class="article-text">
 This is not intended to be grabbed
</div>

<div class="article-text">
  Text to be grabed
</div>

<a href="#" target="_blank" title="Tweet" onclick="console.log(this.prevIoUsElementSibling.textContent.trim())">

<div class="article-text">
 This is not intended to be grabbed
</div>