如何使用JavaScript循环遍历长字符串以在每次匹配后插入新字符串 [英] How to use JavaScript to loop through a long string to insert a new string after every match

问题描述

我有一个包含表示XML文档的长字符串的变量。在该字符串中，我需要搜索每个自动关闭标记并扩展为两个匹配的开始/结束标记。我真的不确定如何解决这个问题，并希望得到你的建议。在这一点上，我所知道的是如何通过正则表达式匹配自动关闭标签： [^<] +？/> 以下是我想要的一个简短示例喜欢完成：

I have a variable that contains a long string that represents an XML document. Within that string, I need to search for every self-closing tag and expand into two matching opening/closing tags. I'm really not sure how to tackle this and would appreciate your advice. At this point, all I know is how to match a self-closing tag via regex: [^<]+?/> Here's a short example of what I would like to accomplish:

ORIGINAL STRING：

ORIGINAL STRING:

<outer-tag>
    <inner-tag-1>
        <SELF-CLOSING-TAG-1 foo="bar"/>
        <SELF-CLOSING-TAG-2/>
    </inner-tag-1>
    <inner-tag-2>
        <SELF-CLOSING-TAG-3 attr="value"/>
    </inner-tag-2>
</outer-tag>

MODIFIED STRING：

MODIFIED STRING:

<outer-tag>
    <inner-tag-1>
        <SELF-CLOSING-TAG-1 foo="bar"></SELF-CLOSING-TAG-1>
        <SELF-CLOSING-TAG-2></SELF-CLOSING-TAG-2>
    </inner-tag-1>
    <inner-tag-2>
        <SELF-CLOSING-TAG-3 attr="value"></SELF-CLOSING-TAG-3>
    </inner-tag-2>
</outer-tag>

推荐答案

我使用了 w3规范创建正则表达式，正确解析格式良好的XML中的标签。

I have used the w3 specifications to create a regexp which correctly parses tags in well-formed XML.

首先，选择定义起始标签的字符（按规格）。然后，匹配剩余的字符，不包括可能尾随间距和 /> 。通过
<全局替换匹配的子串+ starttag +剩余+>< /+ starttag +>。见下文：

First, select the characters which define the start-tag (per specs). Then, match the remaining characters, excluding possibly trailing spaced and />. Globally replace the matched substrings by
"<" + starttag + remaining + "></" + starttag + ">". See below:

//According to the W3 spec: 
var pattern = /<([:A-Z_a-z\xC0-\xD6\xD8-\xF6\xF8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD][-.0-9\xB7\u0300-\u036F\u0203F-\u2040]*)([^>]*?)\s*?\/>/g;
string.replace(pattern, '<$1$2></$1>');

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