JavaScript正则表达式，搜索主题标签 [英] JavaScript regex, searching for hashtags

问题描述

如何在一些文本中搜索任何和所有主题标签（字母数字和下划线和连字符）并将它们换成span标签
例如搜索

How can I search some text for any and all hashtags (alphanumeric AND underscore AND hyphen) and wrap them in span tags eg search

some_string = "this is some text with 3 hashtags #Tag1 and #tag-2 and #tag_3 in it"

并将其转换为：

"this is some text with 3 hashtags <span>#Tag1</span> and <span>#tag-2</span> and <span>#tag_3</span> in it"

到目前为止我已经得到了这个：

I've got this so far:

    some_string = some_string.replace(/\(#([a-z0-9\-\_]*)/i,"<span>$1</span>");

但是一个错误是它不包括＃应该包装中的＃。
似乎输出：

but one fault is it doesn't include the # in the wrappings like it should. It seems to output:

"this is some text with 3 hashtags <span>Tag1</span> and #tag-2 and #tag_3 in it "

此外，它只检测第一个＃标签t它遇到的帽子（例如＃Tag1 在此示例中），它应该检测全部。

Also it only detects the first hashtag that it comes across (eg. #Tag1 in this sample), it should detect all.

此外，我需要将标签符号设置为最小值＃之后的1个字符。所以＃本身不应该匹配。

Also I need the hashtags to be a minimum of 1 character AFTER the #. So # on its own should not match.

谢谢

推荐答案

试试这个替换电话：

编辑：如果你想跳过 http://site.com/#tag 然后使用一种字符串：

if you want to skip http://site.com/#tag kind of strings then use:

var repl = some_string.replace(/(^|\W)(#[a-z\d][\w-]*)/ig, '$1<span>$2</span>');

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