2025-07-24 — By Siddharth Jain · 6 min read

The HTML Tag: A Complete Guide

The tag is a fundamental element in HTML, especially when you want to collect user data through a form. It supports various attributes that define its purpose, appearance, and behavior. Here’s a clear and beginner-friendly explanation of all important attributes.

🔑 What Does the Tag Do?

The tag is used in forms to collect data from users. It allows you to create text fields, email fields, password boxes, date pickers, file uploads, checkboxes, radio buttons, sliders, and more.

✅ Essential Attributes

1. type

Determines what kind of input is expected.

2. name

Gives a name to the field for form submission (used by the server).

<input type="text" name="username" />

3. value

Sets the default or current value in the input box.

<input type="text" value="Hello" />

4. placeholder

Displays helper text that shows what the user should enter.

<input type="email" placeholder="Enter your email" />

5. required

Makes the input field mandatory. The form cannot be submitted without filling this.

<input type="text" required />

6. readonly

Shows the input, but the value cannot be changed by the user.

<input type="text" value="Read only" readonly />

7. disabled

Completely disables the input—users cannot interact with it.

<input type="text" disabled />

8. min and max

Set minimum and maximum values for number, date, or range fields.

<input type="number" min="1" max="100" />
<input type="date" min="2024-01-01" max="2025-12-31" />

9. maxlength and minlength

Control the maximum and minimum length of textual input.

<input type="text" maxlength="10" minlength="3" />

10. pattern

Specifies a regular expression pattern the input value must match.

<input type="text" pattern="[A-Za-z]{3,}" title="At least 3 letters" />

11. step

Defines the increment between allowed values for number or range inputs.

<input type="number" min="0" max="10" step="2" />

12. autocomplete

Controls whether the browser should suggest autofill options for the input.

<input type="text" name="name" autocomplete="off" />

13. autofocus

Automatically focuses this field when the page loads.

<input type="text" autofocus />

14. multiple

Allows selection of more than one value for file or email inputs.

<input type="file" multiple /> <input type="email" multiple />

🔍 Full Example: Login Form

Below is a complete example that demonstrates multiple `` attributes in a form:

<form>
  <label>Email:</label>
  <input
    type="email"
    name="user_email"
    placeholder="example@mail.com"
    required
    maxlength="30"
    autofocus
  />
  <br />
  <label>Password:</label>
  <input type="password" name="user_pass" minlength="6" required />
  <br />
  <input type="submit" value="Login" />
</form>

📋 Final Tips

• Use the correct type for the kind of input you need.
• Add name attributes so your backend can process the data.
• Make forms user-friendly with placeholder, required, and autocomplete.
• Set logical limits with min, max, maxlength, and pattern to ensure data quality.
• Enhance accessibility with readonly, disabled, and autofocus where suitable.

With these attributes, you can build any kind of interactive web form you want—all in a simple, maintainable, and user-friendly way.