How to validate such a hash tag?

Question

JavaScript

There is such a function for validating a field with hash tags - https://codepen.io/viktoraz/pen/KKmqLKK?editors=1010

Hash tags must be separated by a space and each must match the pattern.
1 problem is that the regular expression does not check every hash tag, that is, it allows you to enter the first hash tag without a grid, if the last one is with a grid.
2 problem is to clear the field. If you enter any characters, and then clear the field, the field will still not be valid, although it is empty (checked)

I assume that the problem is just in the regular expression, but I tried many different ones, nothing fits. Is there another way to validate hash tags?

Answer 1

Alternatively, you could make a slightly more powerful regular expression that allows 1 or more valid hashtags separated by spaces. Very rude - add \s* to the end of your regular expression (before the end of the line) and wrap the whole thing in ()+.
For example, regex: (#(?<tag>[A-Za-zА-Яа-я]{1,19})\s*)+( https://regex101.com/r/rfH4AA/1 )
Then we get all the values ​​of the tag group, I'm not strong in js, but I think there must be a way.

Answer 2

I don't understand what the problem is

if("ПОЛЕ ПУСТОЕ"){
//Не проверяете регуляркой
//Отправляете на сервак
}

Next you said:

Hash tags must be space separated

Get all hashtags from user string

let input = "#adsasddasd #adsasdasda #gadsqw-asdas"

let arrHashTag = input.split(" ");

I think further to check each individual element for

pattern matching

It won't be difficult