在第一个空格之后和特殊字符的第一个实例之前获取子字符串？

Question

I am successfully returning a substring before the first instance of a space in a string:

var str = "test1 test2 test3 (test4)";
var str_BeforeSpace = str.substr(0,str.indexOf(' '));
// returns "test1"

What I'm trying to do next is return a substring that exists after the first space and before the first instance of a "(". In this example, the desired substring is "test2 test3" (with no trailing spaces) ...

Answer 1

Not much different:

str.substring(str.indexOf(' ') + 1, str.indexOf('('));

If you want to trim leading and trailing spaces, see Trim string in JavaScript? .