CODEWITHSUNDEEP
javascripthtmlloopswhile-looppasswords
Andreas Poppmeier
Andreas Poppmeier

Reputation: 9

A password tester which alerts the user if spaces are present

A JavaScript program is required to request, via a dialogue box, a password from a user. The input, which can be of any length, must be validated such that it is only valid if it has no spaces. Any character, other than a space, is permissible. As soon as a space is detected, the program should terminate with a message provided in an alert box stating: Invalid, contains a space!

Can anyone help me correct my code, this is my attempt

<!DOCTYPE html>
<html>
<body>

<form action="">

Password: <input type="password" name="password">
</form> ;


var i  ;
var validpassword = "" ;
var passworduser ; 
var isNoSpace =  (?!.*\\s) 



if(isNoSpace = false; i > charAt(i)) //
    alert("Password contains a space!")

    for(j = 1; j<=yourString.length; j++){

        validpassword += ’*’;

    }

    document.write("valid password")

else    
    document.write("password not valid")     
</body>
</html>

Upvotes: 0

Views: 71

Answers (3)

leopik
leopik

Reputation: 2351

Try with var isNoSpace = passworduser == passworduser.replace(" ", "");.

It will check if the passworduser string is the same even when spaces are removed. If it is, it will return true (so isNoSpace = true).

The syntax I have used is equivalent to this

var isNoSpace;
if (passworduser == passworduser.replace(" ", "")) {
    isNoSpace = true;
else
    isNoSpace = false;

Upvotes: 0

Andreas Louv
Andreas Louv

Reputation: 47099

var containingSpace = function(str) {
  return str.indexOf(' ') > -1;
}

console.log(containingSpace('abc')); // false
console.log(containingSpace('ab c')); // true

Upvotes: 3

Vigneswaran Marimuthu
Vigneswaran Marimuthu

Reputation: 2532

RegEx: /\s+/

var pattern = /\s+/;

if (pattern.test(userString)) {
    document.write("password not valid");
} else {
    document.write("valid password");
}

Upvotes: 0

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