var str = "That is a good example.";
var re = /is(.*?)mple/;
var subStr = str.match(re)[1];
console.log(subStr);
运行结果:
var str = "That is a good example.";
var re = /is(.*?)mple/;
var subStr = str.match(re)[1];
console.log(subStr);
运行结果: