获取包含特定元素的完整单词

Question

有了对特定DOM元素(例如<mark>)的引用，我们如何才能获得包含该元素的完整单词？

例如：

H<mark>ell</mark>o Wor<mark>l</mark>d, and He<mark>llo</mark>, <mark>Pluto</mark>!

我希望得到以下输出：

• First <mark>：Hello
• 第二：World
• 第三：Hello
• 第四：Pluto

​

var $marks = $("mark");

var tests = [
  "Hello",
  "World",
  "Hello",
  "Pluto",
];

function getFullWord($elm) {
  // TODO: How can I do this?
  // 		   This is obviously wrong.
  return $elm.html();
}

var $marks = $("mark");
tests.forEach(function(c, i) {
  var word = getFullWord($marks.eq(i));
  if (word !== c) {
    alert("Wrong result for index " + i + ". Expected: '" + c + "' but got '" + word + "'");
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
H<mark>ell</mark>o Wor<mark>l</mark>d, and He<mark>llo</mark>, <mark>Pluto</mark>!

​

Answer 1

如果您需要快速而紧凑的代码(一行代码)，请尝试如下：

var $marks = $('mark');

$marks.each(function() {
    var wholeWord = (this.previousSibling.nodeValue.split(' ').pop() + 
                     this.textContent + 
                     this.nextSibling.nodeValue.split(' ')[0]
                     ).replace(/[^\w\s]/gi, '');
});

JSFiddle (通过登录到控制台和注释)