Create a JavaScript code challenge to build a password strength detector that evaluates the strength of a password based on specific criteria.
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Create an HTML form that includes an input field for entering a password and a button to check the password strength.
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Create a JavaScript function
checkPasswordStrength
that will be called when the button is clicked. -
Inside the
checkPasswordStrength
function:-
Get the password input value.
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Implement the following password strength criteria:
- At least 8 characters in length.
- Contains at least one uppercase letter (A-Z).
- Contains at least one lowercase letter (a-z).
- Contains at least one digit (0-9).
- Contains at least one special character (e.g., !@#$%^&*).
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Assign a strength level to the password based on the following rules:
- "Weak" if it meets fewer than 3 criteria.
- "Moderate" if it meets 3 or 4 criteria.
- "Strong" if it meets 5 criteria.
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Display the detected password strength (e.g., "Weak," "Moderate," or "Strong") and a corresponding message to the user in an HTML element.
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Style the user interface to provide clear visual feedback on the password strength (e.g., using colors or icons).
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Add appropriate error messages or feedback for the user if the password does not meet the minimum criteria.
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Make sure to clear any previous strength and message when checking a new password.
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Inside the
checkPasswordStrength
function:-
Get the password input value.
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Create an array of key-value pairs to store the criteria, their descriptions, and an
isMet
property to track whether each criterion is met. For example:const criteria = [ { key: "length", description: "At least 8 characters in length", isMet: false }, { key: "uppercase", description: "Contains at least one uppercase letter (A-Z)", isMet: false }, { key: "lowercase", description: "Contains at least one lowercase letter (a-z)", isMet: false }, { key: "digit", description: "Contains at least one digit (0-9)", isMet: false }, { key: "special", description: "Contains at least one special character (!@#$%^&*)", isMet: false } ];
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Use a loop to iterate through the criteria array. Check if the password meets the criterion. If it does, set the
isMet
property to true and increment the count.
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- HTML form and elements.
- JavaScript functions.
- Key-value pair arrays with an
isMet
property. - Conditional statements (if-else).
- String manipulation (checking string length, using regular expressions).
- Displaying results in HTML.
- Styling using CSS.