这个正则表达式有什么问题？

Question

var regex = /^[a-z\-A-Z_0-9]{1,}\u0040[_\-0-9a-zA-Z]{1,65}\.[a-zA-Z]{2,}$/;
document.write(regex.check("hi@email.com"));

Answer 1

Your code doesn't output anything, becase the check method doesn't exist in RegExp. You should use RegExp.test method

Answer 2

.{0,0} does not match anything (ie you probably want to start with ^ and end with $ ). And you do not allow jon.bob.smith@my.domain.museum . You should probably read the stackoverflow question about the best email regex .