Implementing two-factor authentication for web applications can be done in a way that supports account security without detracting from the user experience. By using certain HTML attributes, such as `inputmode` to display a numeric keyboard and `pattern` to validate only numbers, developers can improve the login process on mobile devices. Additionally, adding the `autocomplete` attribute with values like "one-time-code" can trigger browsers to suggest two-factor authentication codes sent via SMS, making the experience even easier for users. By incorporating these attributes and best practices, developers can create a better user experience for their users while maintaining account security.