文本框不能以http://或者https://开头，怎么匹配

Question

var httpsRule = (rule, value, callback) => {

        var reg = /http[s]{0,1}:\/\/([\w.]+\/?)\S*/;

        if (value !== '' && !reg.test(value)) {

          console.log(value,'value')

          callback(new Error('XXXXSADX'))

        } else if (value.length > 15) {

          callback(new Error('ASDASDASD'))

        } else {

          callback()

        }

      };

Answer 1

        var reg = /^https?:\/\/([\w.]+\/?)\S*/;