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  • How to validate registration form in javascript

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    JavaScript – How to Validate Form Using Regular Expression?

    In this article, we’ll explore how to validate common form fields such as email, phone number, and password using RegExp patterns.

    1.

    Email validation in javascript

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    • Validating an Email Address

    One of the most common form fields to validate is the email address. We can use a RegExp pattern to ensure the email is in the correct format.


    OutputValid email address
    • ^[a-zA-Z0-9._%+-]+: Matches the local part (before the @) which can include letters, numbers, and certain special characters like ., %, +, -.
    • @[a-zA-Z0-9.-]+: Matches the domain part (after the @), which can contain letters, numbers, hyphens, and periods.
    • \.[a-zA-Z]{2,}$: Ensures the email ends with a valid top-level domain (e.g., .com, .org).

    2.

    Validating a Phone Number

    Next, let’s validate a phone number. Phone number formats vary by region, but we’ll use a basic pattern to validate a typical 10-digit phone number.

    ^\d{10}$: Matches exactly 10 digits.

    The \d stands for a digit, and {10} ensures exactly 10 digits are present.

    3. Validating a Pas

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