Input types (text, email, password, number) in HTML - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the purpose of the email input type?

Which of the following best describes what the email input type does in an HTML form?

A It allows users to enter any text without validation.

B It only accepts numbers and shows a numeric keypad on mobile.

C It validates that the entered text is in a proper email format.

D It hides the entered text for privacy, like a password.

💡 Hint

Think about what makes an email input different from a normal text input.

The email input type helps browsers check if the entered text looks like an email address (with an @ and domain). It also can show a special keyboard on mobile devices.

📝 Syntax

intermediate

Which input type will show dots instead of characters when typing?

You want to create a password field that hides the characters as the user types. Which input type should you use?

A <input type="password">

B <input type="email">

C <input type="text">

D <input type="number">

💡 Hint

Passwords should not be visible on screen.

The password input type masks the characters with dots or asterisks to keep the password private.

❓ rendering

advanced

What happens when you use type="number" in an input?

Consider this HTML code:

<input type="number" min="1" max="5" value="3">

What will the user see and be able to do in most modern browsers?

A A text box that accepts any characters, including letters.

B An email input that validates email format.

C A password field that hides input characters.

D A text box with up/down arrows to increase or decrease numbers between 1 and 5.

💡 Hint

Think about how number inputs help users pick numbers easily.

The number input shows a box where users can type numbers or use arrows to change the value within the set range.

❓ accessibility

advanced

Which attribute improves accessibility for input fields?

You have an input field for email:

<input type="email">

What should you add to make it accessible and clear for screen readers?

A Add an <code>aria-label</code> or associate a <code>&lt;label&gt;</code> with the input.

B Add a <code>placeholder</code> attribute only.

C Add a <code>value</code> attribute with example text.

D Add a <code>disabled</code> attribute.

💡 Hint

Labels help screen readers understand the input purpose.

Using a label or aria-label clearly tells assistive technology what the input is for, improving accessibility.

❓ selector

expert

Which CSS selector targets only input elements of type password?

You want to style only password input fields with a red border. Which CSS selector will do this?

A input#password { border: 2px solid red; }

B input[type=password] { border: 2px solid red; }

C input[type=text] { border: 2px solid red; }

D input.password { border: 2px solid red; }

💡 Hint

Attribute selectors match elements by attribute and value.

The selector input[type=password] matches all input elements whose type attribute is exactly 'password'.

Practice

1. Which input type should you use to let users enter their email address?

easy

A. password

B. text

C. email

D. number

Solution

1. Step 1: Understand the purpose of input types

   The email input type is designed specifically to accept email addresses and validate their format.

2. Step 2: Match input type to data

   Since the question asks for an input type for email addresses, email is the correct choice.

3. Final Answer:

   email -> Option C

4. Quick Check:

   Email input type = email [OK]

Hint: Use email type for email inputs to get validation [OK]

Common Mistakes:

• Using text instead of email loses validation
• Choosing password hides input unnecessarily
• Using number for emails is invalid

2. Which of the following is the correct syntax for a password input field in HTML?

easy

A. <input type='password'>

B. <input password>

C. <input type='pass'>

D. <input type='text-password'>

Solution

1. Step 1: Recall correct input type attribute

   The correct attribute for password fields is type='password'.

2. Step 2: Check each option's syntax

   Only <input type='password'> uses the correct attribute and syntax for a password input.

3. Final Answer:

   <input type='password'> -> Option A

4. Quick Check:

   Password input syntax = <input type='password'> [OK]

Hint: Password inputs use type='password' exactly [OK]

Common Mistakes:

• Omitting type attribute
• Using incorrect type names like 'pass' or 'text-password'
• Writing without type

3. What will the browser do when a user enters letters into this input field?

<input type='number' id='age' name='age'>

medium

A. Accept letters and submit as is

B. Show an error and prevent form submission

C. Automatically convert letters to numbers

D. Ignore the input and submit empty

Solution

1. Step 1: Understand number input behavior

   The number input only accepts numeric values and shows an error if invalid input is entered.

2. Step 2: Predict browser validation

   If letters are typed, the browser will prevent form submission and show a validation error.

3. Final Answer:

   Show an error and prevent form submission -> Option B

4. Quick Check:

   Number input blocks letters = error shown [OK]

Hint: Number inputs block letters and show errors [OK]

Common Mistakes:

• Thinking letters are accepted silently
• Assuming automatic conversion to numbers
• Believing input is ignored without error

4. Identify the error in this HTML snippet:

<input type='email' name='user_email' placeholder='Enter email'>
<input type='number' name='age' min='0' max='100'>
<input type='password' name='pass'>
<input type='text' name='username' required='false'>

medium

A. The required attribute cannot have a value

B. The min and max attributes are invalid on number inputs

C. The placeholder attribute is not allowed on email inputs

D. The type attribute is missing on the password input

Solution

1. Step 1: Review the required attribute usage

   The required attribute is a boolean attribute and should not have a value like 'false'. It is either present or absent.

2. Step 2: Check other attributes

   min and max are valid for number inputs, placeholder is valid for email, and type='password' is present.

3. Final Answer:

   The required attribute cannot have a value -> Option A

4. Quick Check:

   Boolean attributes have no value = The required attribute cannot have a value [OK]

Hint: Boolean attributes like required have no value [OK]

Common Mistakes:

• Setting required='false' instead of removing attribute
• Thinking min/max are invalid on number inputs
• Confusing placeholder usage on email inputs

5. You want to create a form input that:
- Accepts only numbers between 1 and 10
- Shows a placeholder "Enter a number"
- Is required to submit the form
Which is the correct HTML code?

hard

A. <input type='text' min='1' max='10' placeholder='Enter a number' required>

B. <input type='number' placeholder='Enter a number'>

C. <input type='number' min='1' max='10' placeholder='Enter a number' required='false'>

D. <input type='number' min='1' max='10' placeholder='Enter a number' required>

Solution

1. Step 1: Choose input type for numbers

   Use type='number' to accept only numeric input.

2. Step 2: Set min, max, placeholder, and required correctly

   Set min='1' and max='10' to limit range, add placeholder text, and use required as a boolean attribute without value.

3. Step 3: Verify options

   <input type='number' min='1' max='10' placeholder='Enter a number' required> matches all requirements correctly. The version using type='text' allows non-numeric input, the one with required='false' misuses the required attribute, and the simplest version lacks range limits and the required attribute.

4. Final Answer:

   <input type='number' min='1' max='10' placeholder='Enter a number' required> -> Option D

5. Quick Check:

   Number input with min, max, placeholder, required = <input type='number' min='1' max='10' placeholder='Enter a number' required> [OK]

Hint: Use type='number' with min, max, and required (no value) [OK]

Common Mistakes:

• Using type='text' for numbers
• Setting required='false' instead of removing attribute
• Omitting min and max for number limits