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Linking to sections using IDs in HTML - Mini Project: Build & Apply

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Linking to Sections Using IDs
📖 Scenario: You are creating a simple webpage for a small business. The page has multiple sections like Home, About, and Contact. You want visitors to jump quickly to these sections by clicking links at the top.
🎯 Goal: Build a webpage with a navigation menu at the top. Each menu item links to a specific section on the same page using IDs. When a visitor clicks a menu link, the page scrolls to that section.
📋 What You'll Learn
Create three sections with headings: Home, About, Contact
Assign unique IDs to each section
Create a navigation menu with links that use the IDs to jump to each section
Use semantic HTML elements for structure
💡 Why This Matters
🌍 Real World
Websites often have navigation menus that let users jump to different parts of the page quickly. Using IDs and links is a simple way to do this.
💼 Career
Knowing how to link to sections using IDs is a basic but essential skill for front-end web developers and content creators to improve user experience and accessibility.
Progress0 / 4 steps
1
Create the basic HTML structure with sections
Write the basic HTML5 skeleton with a <main> element containing three <section> elements. Each section should have a heading: Home, About, and Contact. Do not add IDs yet.
HTML
Hint

Use <main> to wrap the main content. Inside it, add three <section> elements each with an <h2> heading for Home, About, and Contact.

2
Add unique IDs to each section
Add the IDs home, about, and contact to the <section> elements for Home, About, and Contact respectively.
HTML
Hint

Use the id attribute inside each <section> tag. For example, <section id="home">.

3
Create a navigation menu with links to sections
Add a <nav> element above the <main>. Inside it, create an unordered list <ul> with three list items <li>. Each list item should have a link <a> that uses the href attribute to link to the IDs #home, #about, and #contact with link text Home, About, and Contact respectively.
HTML
Hint

Use <nav> for navigation. Inside it, add <ul> with <li> items. Each <a> tag's href should start with # followed by the section ID.

4
Add accessibility features and finalize structure
Add an aria-label="Primary navigation" attribute to the <nav> element for accessibility. Also, add a <header> element wrapping the <nav> to improve semantic structure.
HTML
Hint

Wrap the <nav> inside a <header> tag. Add aria-label="Primary navigation" to the <nav> for screen readers.

Practice

(1/5)
1. What is the purpose of the id attribute in HTML when linking to sections?
easy
A. It hides the section from the page.
B. It styles the section with a unique color automatically.
C. It marks a section so you can link directly to it using an anchor.
D. It creates a new page in the browser.

Solution

  1. Step 1: Understand the role of the id attribute

    The id attribute uniquely identifies an element on the page.

  2. Step 2: Linking to sections using id

    Links with href="#id" jump directly to the element with that id.

  3. Final Answer:

    It marks a section so you can link directly to it using an anchor. -> Option C

  4. Quick Check:

    id marks section for linking [OK]
Hint: Use id to name sections for direct links [OK]
Common Mistakes:
  • Thinking id changes style automatically
  • Confusing id with class
  • Believing id creates new pages
2. Which of the following is the correct syntax to link to a section with id="contact"?
easy
A. <a href="#contact">Contact</a>
B. <a link="#contact">Contact</a>
C. <a id="contact">Contact</a>
D. <a href="contact">Contact</a>

Solution

  1. Step 1: Identify how to link to an id

    Links to sections use href="#id" where id is the target's identifier.

  2. Step 2: Check each option's syntax

    <a href="#contact">Contact</a> uses href="#contact", which is correct. Others miss the # or use wrong attributes.

  3. Final Answer:

    <a href="#contact">Contact</a> -> Option A

  4. Quick Check:

    Link uses href="#id" [OK]
Hint: Use # before id in href to link sections [OK]
Common Mistakes:
  • Omitting the # in href
  • Using id attribute inside <a> instead of href
  • Using non-standard attributes like link
3. Given this HTML snippet, what happens when the user clicks the link?
<a href="#about">About Us</a>
...
<section id="about">
  <h2>About Our Company</h2>
  <p>We build websites.</p>
</section>
medium
A. Nothing happens because the link is broken.
B. The page scrolls to the section with heading 'About Our Company'.
C. The browser opens a new tab with the 'about' page.
D. The page reloads to the top.

Solution

  1. Step 1: Understand the link's href attribute

    The link uses href="#about", which targets the element with id="about".

  2. Step 2: Describe browser behavior on clicking such a link

    The browser scrolls smoothly to the element with that id, showing the 'About Our Company' section.

  3. Final Answer:

    The page scrolls to the section with heading 'About Our Company'. -> Option B

  4. Quick Check:

    href="#id" scrolls to that section [OK]
Hint: Clicking href="#id" scrolls to that section [OK]
Common Mistakes:
  • Thinking it opens a new page
  • Assuming the link does nothing
  • Believing it reloads the page
4. What is wrong with this code if the link does not jump to the section?
<a href="#services">Our Services</a>
...
<section id="service">
  <h2>Services Offered</h2>
</section>
medium
A. The href attribute should not have a #.
B. The link text must match the section heading exactly.
C. The section tag cannot have an id.
D. The id in the section does not match the href value.

Solution

  1. Step 1: Compare href and id values

    The link uses href="#services" but the section has id="service" (missing 's').

  2. Step 2: Understand matching requirement

    For the link to work, the href must exactly match the target element's id.

  3. Final Answer:

    The id in the section does not match the href value. -> Option D

  4. Quick Check:

    href and id must match exactly [OK]
Hint: Check href and id spellings match exactly [OK]
Common Mistakes:
  • Forgetting the # in href
  • Using wrong or mismatched id names
  • Thinking link text affects the jump
5. You want to create a navigation menu that links to three sections: Home, About, and Contact. Which HTML snippet correctly sets up the links and sections using IDs?
hard
A. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section id="contact">Contact details</section>
B. 
<nav>
  <a href="home">Home</a>
  <a href="about">About</a>
  <a href="contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section id="contact">Contact details</section>
C. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home-section">Welcome!</section>
<section id="about-section">About us info</section>
<section id="contact-section">Contact details</section>
D. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section>Contact details</section>

Solution

  1. Step 1: Check href values in navigation links

    Links use href="#home", href="#about", and href="#contact" which is correct syntax to link to IDs.

  2. Step 2: Verify matching section IDs

    Sections have matching id="home", id="about", and id="contact" exactly matching the href targets.

  3. Final Answer:

    Option A correctly links navigation anchors to matching section IDs. -> Option A

  4. Quick Check:

    Matching href="#id" and section id [OK]
Hint: Match href="#id" exactly with section id [OK]
Common Mistakes:
  • Omitting # in href
  • Mismatching href and id names
  • Missing id attribute on sections
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10 questions~5 mineasy hard