javascript - 将字符串替换为javascript正则表达式中的括号

Question

我正在尝试这个

str = "@a@b";
str2 = str.replace(/@/g,'-[' + str + ']');

输出应该是 -[a]-[b]

Answer 1

您可以搜索 @ 而不是 @，如下所示，然后替换该组。

/@([^@]+)/g
 @           look for this character literately
  (     )    group, this is the part used for replacing -> $1 in replacement string
   [^@]+     look for one or more not @ characters
          g  global flag, replace all found matches

替换是用第一组$1进行的。

var str = "@a@b",
    str2 = str.replace(/@([^@]+)/g,'-[$1]');

console.log(str2);