CODEWITHSUNDEEP
javascripttrim
Sourav
Sourav

Reputation: 17530

Replace all whitespace characters

I want to replace all occurrences of white space characters (space, tab, newline) in JavaScript.
How to do so?

I tried:

str.replace(/ /gi, "X")

Upvotes: 173

Views: 263550

Answers (10)

Anseam
Anseam

Reputation: 29

You could use the function trim

let str = ' Hello World ';

alert (str.trim());

All the front and back spaces around Hello World would be removed.

Upvotes: 2

Milos Stankovic
Milos Stankovic

Reputation: 611

We can also use this if we want to change all multiple joined blank spaces with a single character:

str.replace(/\s+/g,'X');

See it in action here: https://regex101.com/r/d9d53G/1

Explanation

/ \s+ / g

  • \s+ matches any whitespace character (equal to [\r\n\t\f\v ])
  • + Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

  • Global pattern flags
    • g modifier: global. All matches (don't return after first match)

Upvotes: 49

Headshota
Headshota

Reputation: 21449

Try this:

str.replace(/\s/g, "X")

Upvotes: 5

GigiProve
GigiProve

Reputation: 337

If you use 

str.replace(/\s/g, "");

it replaces all whitespaces. For example:

var str = "hello my world";
str.replace(/\s/g, "") //the result will be "hellomyworld"

Upvotes: 7

Alex K.
Alex K.

Reputation: 175748

You want \s

Matches a single white space character, including space, tab, form feed, line feed.

Equivalent to

[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]

in Firefox and [ \f\n\r\t\v] in IE.

str = str.replace(/\s/g, "X");

Upvotes: 373

dude
dude

Reputation: 6086

I've used the "slugify" method from underscore.string and it worked like a charm:

https://github.com/epeli/underscore.string#slugifystring--string

The cool thing is that you can really just import this method, don't need to import the entire library.

Upvotes: 0

Dimitrios Ververidis
Dimitrios Ververidis

Reputation: 1215

Not /gi but /g

var fname = "My Family File.jpg"
fname = fname.replace(/ /g,"_");
console.log(fname);

gives

"My_Family_File.jpg"

Upvotes: 3

Siten
Siten

Reputation: 4533

Actually it has been worked but

just try this.

take the value /\s/g into a string variable like 

String a = /\s/g;

str = str.replaceAll(a,"X");

Upvotes: 1

Michael Berkowski
Michael Berkowski

Reputation: 270609

Have you tried the \s?

str.replace(/\s/g, "X");

Upvotes: 8

Quentin
Quentin

Reputation: 943142

\s is a meta character that covers all white space. You don't need to make it case-insensitive — white space doesn't have case.

str.replace(/\s/g, "X")

Upvotes: 38

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