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