1、js截取兩個字符串之間的內容:
let str = "aaabbbfff";
let result = str.match(/aaa(\S*)fff/)[1]; // bbb
2、js截取某個字符串前面的內容:
let str = "aaafffbbb";
let result = str.match(/(\S*)fff/)[1]; // aaa
3、js截取某個字符串後面的內容:
let str = "aaafffbbb";
let result = str.match(/aaa(\S*)/)[1]; // fffbbb