從javascript中的變量中刪除開始和結束逗號

Question

我在javascript中具有以下變量。我想刪除的起始和結束使用jQuery/JavaScript的「逗號」簽署

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

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

請指教

Answer 1

正則表達式應該幫助

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

^,逗號在字符串的開頭匹配和,$匹配逗號結束..

Answer 2

test.substring(1, test.length - 1);應該爲你做。

Answer 3

下面的代碼示例將做到這一點

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

Answer 4

即使容易

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