remove starting and ending comma from variable in javascript

i have the below variable in javascript. i want to remove the starting and ending "comma" 开发者_Go百科sign using jquery/javascript

var test=",1,2,3,4," <--- 

Expected output: var test="1,2,3,4"

please advice

Regex should help

var edited = test.replace(/^,|,$/g,'');

^, matches the comma at the start of the string and ,$ matches the comma at the end ..

Below code sample will do this

        var str = ",1,2,3,4,5,6,7,8,9,";
        str = str.substring(1,str.lastIndexOf(","));

test.substring(1, test.length - 1); should do it for you.

Even easier

var result = test.slice(1,-1);