regex to remove multiple comma and spaces from string in javascript [closed]

Question

I have a string like

var str=" , this,  is a ,,, test string , , to find regex,,in js.  , ";

in which there are multiple spaces in beginning,middle and end of string with commas. i need this string in

var str="this is a test string to find regex in js.";

i found many regex in forum removing spaces , commas separately but i could not join them to remove both.

Please give explanation of regex syntex to if possible .

Thanks in advance

Answer 1

You can just replace every space and comma with space then trim those trailing spaces:

var str=" , this,  is a ,,, test string , , to find regex,,in js.  , ";
res = str.replace(/[, ]+/g, " ").trim();

jsfiddle demo

Answer 2

you can use reg ex for this

/[,\s]+|[,\s]+/g

var str= "your string here";
//this will be new string after replace
str = str.replace(/[,\s]+|[,\s]+/g, 'your string here');

RegEx Explained and Demo

Answer 3

Try something like this:

var new_string = old_string.replace(/[, ]+/g,' ').trim();

The regex is simply [, ]+ if we were to break this down the \s means ANY whitespace character and , is a literal comma. The [] is a character set (think array) and the + means one or more matches.

We throw in a /g on the end so that it does a global search and replace, otherwise it'd just do it for one match only.

Answer 4

You should be able to use

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

The 'g' is the key, you may need to use [,]