匹配冒号后和新行之前的文本

这个问题在这里已经有了答案：

如何访问JavaScript正则表达式中的匹配组？ 14个答案

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您必须使用regex.exec()而不是.match() 。 然后您可以像普通数组那样访问匹配的组：

var text = $('.text').html();
var regex = new RegExp('Concept number 1:(.*?)<br>');
var matches = regex.exec(text);

console.log(matches[1]);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="text">
Concept number 1: my content here1<br>
Concept number 2: my content here2<br>
Concept number 3: my content here3<br>
</div>

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就我个人而言，我会努力解决DOM，而不是innerHTML

var text = $('.text').contents()  //get all the textnodes and elements
             .filter( function (i, node) { //get just the text nodes
               return node.nodeType==3
             }).map( function (i, node) {  //get the text you are after
               var match = node.nodeValue.match(/:s+(.*)/)
               return match ? match[1] : undefined
            }).get()  //turn jQuery object into array
console.log(text)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="text">
Concept number 1: my content here1<br>
Concept number 2: my content here2<br>
Concept number 3: my content here3<br>
</div>

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