javascript - js如何用正则表达式替换字符中的首尾中括号[] 为{}，而不影响中括号里面的中括号?

Question

如把
"[jjj:111,[kkkk:222,ggg:333],mmm:444]"替换为
"{jjj:111,[kkkk:222,ggg:333],mmm:444}"

Answer 1

自己写了一个，
str = str.replace(/^\[(.*)\]$/, "\{$1\}")

Answer 2

var s = "[jjj:111,[kkkk:222,ggg:333],mmm:444]";
alert(s.replace(/^[\[]/,"{").replace(/[\]]$/,"}"));