如何替换javascript中单词之间的所有空格

Question

This should be simple bu I can't get it working.

The title pretty much explains it all. I tried:

var tags = "best cars ever";
var hashtags = tags.replace("/\s/g", "");
document.write(hashtags);

and also:

var tags = "best cars ever";
var hashtags = tags.replace("/ /g", "");
document.write(hashtags);

Answer 1

When you use replace() with a regular expression, don't put that expression inside a string:

 var tags = "best cars ever"; var hashtags = tags.replace(/\\s/g, ""); console.log(hashtags); 

Answer 2

var tags = "best cars ever";
tags.split(" ").join("");

Answer 3

You can use the RegExp constructor to creates a regular expression or literal. ( see bellow an example with RexExp constructor)

 var tags = "best cars ever"; var hashtags = tags.replace(new RegExp("\\\\s","g"), ""); console.log(hashtags);