javascript - Regular expression with Password -


this question has answer here:

var pattern = /^[a-za-z0-9!@#$%^&*()~]+$/;  var username = document.getelementbyid("txtusername").value;  if(pattern.test(username) == false) {      alert("invalid username"); }

the above regex pattern not working. want regular expression password must contain @ least 1 lowercase letter, 1 uppercase letter, 1 digit , 1 special character.

then have make separate tests:

if (/[a-z]/.test(username) && /[a-z]/.test(username) && ...)

you cannot reasonably express requirements in single regex.


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