What is password in javascript?
JavaScript : HTML Form validation - checking for passwordLast update on August 19 2022 21:50:37 (UTC/GMT +8 hours)Sometimes a password validation in a form is essential. You can create a password in different ways, it's structure may be simple, reasonable or strong. Here we validate various type of password structure through JavaScript codes and regular expression. Show
Following code blocks contain actual codes for the said validations. We have kept the CSS code part common for all the validations. CSS Code:
To check a password between 7 to 16 characters which contain only characters, numeric digits, underscore and first character must be a letterTo validate the said format we use the regular expression ^[A-Za-z]\w{7,15}$, where \w matches any word character (alphanumeric) including the underscore (equivalent to [A-Za-z0-9_]). Next the match() method of string object is used to match the said regular expression against the input value. Here is the complete web document. HTML Code:
JavaScript Code:
View the example in the browser To check a password between 6 to 20 characters which contain at least one numeric digit, one uppercase and one lowercase letterTo validate the said format we use the regular expression ^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{4,8}$. Next the match() method of string object is used to match the said regular expression against the input value. Here is the complete web document. HTML Code:
JavaScript Code:
View the example in the browser To check a password between 7 to 15 characters which contain at least one numeric digit and a special characterTo validate the said format we use the regular expression ^^(?=.*[0-9])(?=.*[[email protected]#$%^&*])[[email protected]#$%^&*]{7,15}$. Next the match() method of string object is used to match the said regular expression against the input value. Here is the complete web document. HTML Code:
JavaScript Code
View the example in the browser To check a password between 8 to 15 characters which contain at least one lowercase letter, one uppercase letter, one numeric digit, and one special characterTo validate the said format we use the regular expression ^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9])(?!.*\s).{8,15}$. Next the match() method of string object is used to match the said regular expression against the input value. Here is the complete web document. HTML Code:
JavaScript Code:
View the example in the browser Download the Validation code from herePrevious: JavaScript: HTML Form - Credit Card Number validation What is password in HTML?The defines a password field (characters are masked). Note: Any forms involving sensitive information like passwords should be served over HTTPS.
How do I know my JavaScript username and password?JavaScript Form Validation Example.
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