I am working on a form that includes a password field. I need to validate it so that the value entered is a 7-digit string containing at least one number, otherwise it should return false.
Can someone assist me with this validation?
I am working on a form that includes a password field. I need to validate it so that the value entered is a 7-digit string containing at least one number, otherwise it should return false.
Can someone assist me with this validation?
Define the initial regular expression
Let regexPattern = /\d{4}\w/gi;
let userPassword = $("#userpassword").value;
if(regexPattern.test(userPassword)){
return true;
} else {
return false;
}
There must be a more efficient solution, but perhaps something along the lines of:
if ( /.{7}/.test(str) && /\d/.test(str) ) {
//Proceed
}
To utilize regular expressions in your javascript code, you can make use of the RegExp object.
var regEx = new RegExp(pattern, modifiers);
Alternatively, you can simplify it as:
var pattern = /pattern/modifiers;
For example:
var password = "abcdefg1";
var pattern = /\w{7}\d/i;
var isMatch = pattern.test(password);
Below are some examples of expressions that can be used:
[abc] Find any character within the specified range
[^abc] Find any character outside the specified range
[0-9] Find any digit between 0 and 9
[A-Z] Find any uppercase letter from A to Z
[a-z] Find any lowercase letter from a to z
[A-z] Find any letter from uppercase A to lowercase z
[adgk] Find any of the characters listed
[^adgk] Find any character not listed
(red|blue|green) Find any of the given alternatives
Metacharacters:
. Find any single character except for newline or line terminator
\w Find any word character
\W Find any non-word character
\d Find any digit
\D Find any non-digit character
\s Find any whitespace character
\S Find any non-whitespace character
\b Find a match at the start or end of a word
\B Find a match not at the start or end of a word
\0 Find a NUL character
\n Find a newline character
\f Find a form feed character
\r Find a carriage return character
\t Find a tab character
\v Find a vertical tab character
\xxx Find the character represented by an octal number xxx
\xdd Find the character represented by a hexadecimal number dd
\uxxxx Find the Unicode character represented by a hexadecimal number xxxx
Quantifiers
n+ Matches any string with at least one occurrence of n
n* Matches any string with zero or more occurrences of n
n? Matches any string with zero or one occurrence of n
n{X} Matches any string with a sequence of X n's
n{X,Y} Matches any string with a sequence of X to Y n's
n{X,} Matches any string with a sequence of at least X n's
n$ Matches any string with n at the end
^n Matches any string starting with n
?=n Matches any string followed by a specific string n
?!n
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