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Regex to match hashtag character with string format in javascript

I need a Regex to match a certain string format in javascript,

A hashtag symbol '#' has to be first and last character , There must be strings between these two characters,

If the string is more than one there must be two hashtag '##' symbol between each of them there is no limit to strings number.

Ex.

#string1##string2##string3##...##string4#
#string1#
#string##string2#

7 months ago · Juan Pablo Isaza

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Accepted Answer · 2022-06-30T18:33:19.944Z

You can check the below regex with this pattern

#[^\#]+#: All characters (except #) between ##

(#[^\#]+#)+: At least a string matched the pattern

^ and $: Start and end of regex

const checkRegex = (value) => {
  const regex = /^(#[^\#]+#)+$/
  return regex.test(value)
}

console.log(checkRegex("#test")) //false
console.log(checkRegex("#test#")) //true
console.log(checkRegex("#test##")) //false
console.log(checkRegex("#test##test#")) //true
console.log(checkRegex("#test##test##")) //false

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