在javascript中从变量中删除开始和结束逗号

Question

我在javascript中有以下变量。我想使用jquery / javascript

删除开头和结尾的“逗号”符号

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

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

请咨询

Answer 1

正则表达式应该提供帮助

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

^,匹配字符串开头的逗号，,$匹配末尾的逗号。

Answer 2

下面的代码示例将执行此操作

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

Answer 3

test.substring(1, test.length - 1);应该为你做。

Answer 4

更容易

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