The following content is excerpted from the book "HTML5 & CSS3 for the Real World, 2nd Edition" co-authored by Alexis Goldstein, Louis Lazaris and Estelle Weyl. This book is available in stores around the world, and you can also purchase the e-book version here.

We've written most of the page code and you now know almost everything about the new HTML5 elements and their semantics. But before we start designing the website's look (we're doing it in Chapter 7), we'll quickly leave the homepage of HTML5 Herald to check out the registration page. This will illustrate the functionality HTML5 provides in terms of web forms.

HTML5 Web forms introduce new form elements, input types, attributes, native verification and other form features. We have used many of these features in the interface for years: form validation, combo boxes, placeholder text, and more. The difference is that we had to turn to JavaScript to create these behaviors in the past; now they can be used directly in the browser. You just need to include properties in the tag to use them.

HTML5 not only makes form tagging easier for developers, but also for users. Since the browser handles client verification natively, there will be greater consistency between different websites, and many pages will load faster without all redundant JavaScript.

Let's get started!

Reliable Tools in Toolbox

Forms are usually the last thing developers include in their pages – many developers find forms boring. The good news is that HTML5 injects more fun into form encoding. At the end of this chapter, we hope you can expect to use form elements appropriately in your markup.

Let's start with normal HTML Our registration form:

<form id="register" method="post">
  <fieldset>
    <h1>注冊(cè)</h1>
    <p>我想收到您的優(yōu)秀出版物。</p>
  </fieldset>

  <ul>
    <li>
      <label for="register-name">我的名字是：</label>
      <input type="text" id="register-name" name="name">
    </li>
    <li>
      <label for="address">我的電子郵件地址是：</label>
      <input type="text" id="address" name="address">
    </li>
    <li>
      <label for="url">我的網(wǎng)站位于：</label>
      <input type="text" id="url" name="url">
    </li>
    <li>
      <label for="password">我希望我的密碼是：</label>
      <p>(至少6個(gè)字符，無空格)</p>
      <input type="password" id="password" name="password">
    </li>
    <li>
      <label for="rating">在1到10的范圍內(nèi)，我對(duì)HTML5的了解程度是：</label>
      <input type="text" name="rating" id="rating">
    </li>
    <li>
      <label for="startdate">請(qǐng)從以下日期開始我的訂閱：</label>
      <input type="text" id="startdate" name="startdate">
    </li>
    <li>
      <label for="quantity">我想收到</label>
      <input type="text" name="quantity" id="quantity">
      <label for="quantity">份《The HTML5 Herald》。</label>
    </li>
    <li>
      <label for="upsell">也為我注冊(cè)《The CSS3 Chronicle》</label>
      <input type="checkbox" id="upsell" name="upsell" value="CSS Chronicle">
    </li>
    <li>
      <input type="submit" id="register-submit" value="提交">
    </li>
  </ul>
</form>

This example registration form uses form elements that have been available since the earliest version of HTML. This form provides users with clues about the expected data type in each field through the tags and p elements, so even your users on Netscape 4.7 and IE5 (just kidding!) can understand this form. It works, but it can certainly be improved.

In this chapter, we will enhance this form to include HTML5 form functionality. HTML5 provides new input types specific to email addresses, URLs, numbers, dates, and more. In addition, HTML5 also introduces properties that can be used with new and existing input types. These allow you to provide placeholder text, mark fields as required, and declare acceptable data types—all without JavaScript required.

We will introduce all newly added input types later in this chapter. Before that, let's take a look at the new form properties provided by HTML5.

FAQs (FAQ) about HTML5 forms and reliable tools

What are HTML5 forms and why are they important?

HTML5 forms are an integral part of web development and allow users to interact with websites. They are used to collect user input, such as contact information, feedback or payment information. The importance of HTML5 forms is their ability to enhance user experience, improve data collection, and facilitate seamless communication between users and websites.

How is HTML5 form different from traditional HTML form?

HTML5 forms have several improvements over traditional HTML forms. They provide new input types, attributes, and elements, providing better user experience and data verification. For example, HTML5 forms support email, date, and numeric input types that are not available in traditional HTML forms.

What are some reliable tools for processing HTML5 forms?

There are several reliable tools to help you use HTML5 forms more efficiently. These include form builders like Wufoo and JotForm, validation libraries like Parsley.js and jQuery Validation, and CSS frameworks like Bootstrap with pre-designed form components.

How to find HTML ID or name in a form?

To find the HTML ID or name in the form, you can check the source code of the form. Right-click the form and select Check or Check Elements. This will open the browser's developer tools where you can see the HTML code for the form. The ID or name of a form element is usually specified in its start tag.

What is the role of ID attribute in HTML5 forms?

The ID attribute in HTML5 forms is used to uniquely identify form elements. They are essential for linking tags to their corresponding form fields, locating elements with JavaScript, and styling elements with CSS.

What are some underrated tools for processing HTML5 forms?

Some underestimated tools for processing HTML5 forms include CSS Grid for creating flexible form layouts, HTML5 Boilerplate for starting with a solid foundation, and Modernizr for handling HTML5 feature detection.

How to ensure the security of the tool when using HTML5 forms?

Ensure tool security when using HTML5 forms includes following best practices, such as validating user input to prevent security vulnerabilities, testing your forms on different browsers and devices to ensure compatibility, and making your tools and libraries Stay up to date.

What are some common challenges you encounter when using HTML5 forms and how to overcome them?

Some common challenges encountered when using HTML5 forms include handling browser inconsistency, ensuring accessibility, and validating user input. These can be overcome by using reliable tools and libraries, following web standards, and thoroughly testing your forms.

How to improve the user experience of HTML5 forms?

Improving the user experience of HTML5 forms can be achieved by using clear and descriptive tags, providing useful error messages, and making your forms responsive so that they display and work well on all devices.

What resources are there to learn more about HTML5 forms?

Some resources to learn more about HTML5 forms include HTML5 specifications on W3C websites, online tutorials and courses on platforms such as SitePoint and GeeksforGeeks, and web development communities such as Stack Overflow and GitHub.

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