How can I check if a string is empty including hard return?

Question

Currently I have a function that checks if a string is empty or not, but it does not detects if I there is a new line

export const isStrEmpty = function(text: string): boolean {
  return !text || text.match(/^ *$/) !== null;
};

I tried adding \n, it doesn't work

export const isStrEmpty = function(text: string): boolean {
  return !text || text.match(/^ *\n$/) !== null;
};

Is there a way I can make this function detects if there is a new line in the string?

You can use this `!!text` , as it would convert the string into boolean `true` if it's length all except 0. — Todarmal, Sep 05 '19 at 11:46

score 0 · Accepted Answer · answered Sep 05 '19 at 11:50

0

If you want to do it the regex way:

^\s*$

where \s* matches any whitespace character (equal to [\r \n \t \f \v])

answered Sep 05 '19 at 11:50

true_gler

1

next time, please just mark as a duplicate, no need to repost identical answers – georg Sep 05 '19 at 11:51

score 0 · Answer 2 · answered Sep 05 '19 at 11:57

0

return letter.trim()==='' ? true : false;

Please try this.

answered Sep 05 '19 at 11:57

Divyesh patel

2 Answers2