如何在JavaScript中为特殊条件设置正则表达式?

Hashtag字符的限制

• 在关键字中只使用数字和字母。您可以使用下划线,但出于美观考虑,请谨慎使用。连字符和破折号不起作用。

• 没有空间

• 没有特殊字符

• hashtag可以以数字开头

• hashtag可以是任何语言

• 标签可以是表情符号或符号

我是这样想的,但不包括最后两个条件:

const subStr = postText.split(/(?=[\s:#,+/][a-zA-Z\d]+)(#+\w{2,})/gm);

const result = _.filter(subStr, word => word.startsWith('#')).map(hashTag => hashTag.substr(1)) || [];

编辑:

示例:如果我有:

const postText = "#hello12#123 #hi #£hihi #This is #👩 #Hyvääpäivää #Dzieńdobry #जलवायुपरिवर्तन an #example of some text with #hash-tags - http://www.example.com/#anchor but dont want the link,#hashtag1,hi #123 hfg skjdf kjsdhf jsdhf kjhsdf kjhsdf khdsf kjhsdf kjhdsf hjjhjhf kjhsdjhd kjhsdfkjhsd #lasthashtag";

结果应该是:

["hello12", "123", "hi", "This", "👩", "Hyvääpäivää", "Dzieńdobry", "जलवायुपरिवर्तन", "example", "hash", "anchor", "hashtag1", "123", "lasthashtag"]

我现在所拥有的:

["hello12", "123", "hi", "This", "Hyv", "Dzie", "example", "hash", "anchor", "hashtag1", "123", "lasthashtag"]

注意:我不想使用JavaScript库。