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")

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");

\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")

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

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

Have you tried the \s?

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

Try this:

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

Not /gi but /g

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

gives

"My_Family_File.jpg"

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"

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");

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.

来源：https://stackoverflow.com/questions/6507056/replace-all-whitespace-characters

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