Disable pasting text into HTML form

Applying enforcement on input discipline

Using JavaScript for custom event handling

You can extend paste-blocking to all input fields using JavaScript:

// JavaScript to the rescue
document.querySelectorAll('input[type="text"]').forEach(input => {
    // No pasting allowed in this neighborhood
    input.onpaste = e => e.preventDefault();
});
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Realize that this approach provides an easy way to update and manage all fields in the site.

Considering accessibility

While adding security and input validation, think about your users, especially those with disabilities. Provide alternatives for user verification that don't fully depend on keyboard input.

Implementing alternative verification methods and boosting user engagement

Consider alternate verification steps like a confirmed email or two-factor authentication to ensure the email is valid without hindering user input process.

Check compatibility across browsers

User experiences vary across different browsers, so test the JavaScript paste-blocking mechanism across multiple browsers to avoid leaving some users out in the cold rain.

Watch out for tech-savvy users

Clever users might turn off JavaScript. Ensure an alternative server-side validation exists to catch any bypassed rules.

Proactive user engagement

Design a two-way communication channel that lets users express their views on the input restrictions, helping to refine the user's experience.

Additional Client-side implementations

Use jQuery to prevent paste

Here's a short snippet for jQuery users:

// jQuery saves the day
$('input[type="text"]').on('paste', function (e) {
    // Here: Paste? Not on my watch!
    e.preventDefault();
});
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Email verification not to affect user experience

Highlight the need for manual email input to ensure users are sufficiently attentive during the verification process. This practice adds to the security of user data.

Impact on usability and autofill prevention

Bay browsers have a mind of their own, autofilling fields. Use autocomplete="off" to keep them in check:

<input type="email" autocomplete="off">
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But remember, every coin has two sides. This might slow down form completion for some users.