javascript - 从字符串的开头和结尾删除多个逗号

Question

考虑这个场景

var str1 = '^^ranbir$$this is first comment,,';
var str2 = ',,^^check$$this is another comment,,';
var str3 = ',,^^mike$$this is 3rd comment, but this is not the last one,,';

我希望各自的输出是

console.log(str1) // ^^ranbir$$this is first comment
console.log(str2) // ^^check$$this is another comment
console.log(str3) // ^^mike$$this is 3rd comment, but this is not the last one

基本上删除字符串开头和结尾的所有逗号。通过尝试堆栈溢出的几种解决方案，我能够从字符串的第一个和最后一个逗号中删除一个逗号，但无法使其工作。

Answer 1

删除字符串开头和结尾的尾随逗号和可能的空格的统一解决方案:

var str3 = ',,, ^^mike$$this is 3rd comment, but this is not the last one  ,,,,  ',
    replaced = str3.replace(/^\s*,+\s*|\s*,+\s*$/g, '');

console.log(replaced);