What is the significance of duplicate IDs causing errors in an HTML5 exam?

Here is some HTML code that I'm working with:

<span>
    <a href="#">
        <span class="caption">
            <p id="first">Text1</p>
            <p id="desc">click to read</p>
        </span>
        <img class="img_link" src="img/thing1.jpg" width="218" height="181" 
             alt="thing1"/>
    </a>
</span>
<span>
    <a href="#">
        <span class="caption">
            <p id="first">Text2</p>
            <p id="desc">click to read</p>
        </span>
        <img class="img_link" src="img/thing2.jpg" width="218" height="181" 
             alt="thing2"/>
    </a>
</span>

I am trying to create a transition effect for images using CSS with this code, but I keep getting an error message about duplicate IDs ("first" and "desc"). I need to style the text differently by resizing the font of "first" to 14px and "desc" to 12px.

The issue is that the paragraphs with IDs "first" and "desc" cannot be direct children of the "span" element according to validation rules.

If anyone has a solution or suggestion on how to tackle this problem, I would appreciate it!

UPDATE: Thanks to the advice I received, I have changed the IDs to classes. However, I still need help with resizing the text within the "first" and "desc" classes as it seems unconventional to place inline elements within block elements.

UPDATE 2: Problem solved! By using div elements instead of spans, I was able to achieve the desired result. This project is for a school assignment focused on creating a gallery layout with images aligned side by side using float: left.

Thank you for all the helpful tips!

Answer №1

You have a few errors:

  • The id attribute is meant to be unique according to HTML/SGML standards. If you need to display duplicates, use the class attribute instead (this explains why getElementsByClassName returns a list while getElementById only retrieves a single item in the JavaScript DOM API)
  • A span is an inline element, whereas a p is a block element. HTML does not allow block elements inside inline elements. Replace your span with a div and use display: inline or display: inline-block if you want it to appear as an inline-level element. Examples of inline elements are a, span, etc.; examples of block elements are div, p, ul, li, etc.

Answer №2

The reason for this is the type of element being used.

<p> tag functions as a block-level element 

<span> tag functions as an inline element

It is considered incorrect to nest a block level element within an inline level element.

Answer №3

One advantage of using classes is the flexibility it provides.
Consider the following changes:

1.

id="first" --> class="first"
id="desc" --> class="desc"

2.
It's important to note that you should only include certain tags within a span tag such as

<i>, <b>, <strong>, and <br /> ...
.
Using <br/ >, you can create two lines within your span tag.

Answer №4

Transform it to this:

<p class="first">

and

<p class="desc">

UPDATE: It is recommended to completely remove the spans. They are unnecessary. If you find yourself needing to enclose block-level elements, consider using divs

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What is the HTML and CSS code to create a webpage with 3 separate columns?

Looking to create 3 vertical columns on an HTML page: #navbar {width:15%} #content {width:70%} #right {width:15%} Implemented this stylesheet for the layout: #container { position: fixed; float: none; overflow: visible; height: auto; widt ...

Form with input fields arranged horizontally

I am working on an HTML form that is currently arranged vertically, but I am struggling to figure out how to place two text fields on the same line. Specifically, I would like to have the First Name and Last Name fields next to each other on one line rat ...

What is the best way to display chosen options from a series of questions using PHP?

I have a loop that retrieves questions from a database and displays them in a form with predefined answers like Yes, No, or Not sure. Users can answer any number of questions, but at least one question must be answered. How can I display the questions and ...

Tips for organizing labels and user input within an HTML document

I attempted to align inputs and labels horizontally. Here is what I tried: <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/> <div class="row"> <div class="span2"> <h2& ...

The primary HTML file in Angular is unable to access the styles.scss file located in the src/styles directory

Just starting out with Angular. To incorporate the 7-1 scss pattern into my project, I established a styles folder within the src directory named "src/styles", and connected the components to the src/styles/style.scss file successfully. However, I'm ...

Create a visually appealing rectangular box with written content inside

Can you assist with designing a text box similar to this image: https://i.sstatic.net/K5zw8.png I would like the login label inside the border of the textbox. Any guidance on how to achieve this using Bootstrap and CSS would be greatly appreciated, thank ...

I'm currently working on setting up my registration website, however, I've encountered an error in the terminal

I encountered an error message stating: TypeError: Object of type builtin_function_or_method is not JSON serializable Can someone explain the meaning of this message to me? ...

Maintain form activity post submission using jQuery's addClass and removeClass methods

There is a button on my website that, when clicked, reveals a form. The code I am using for this functionality is: $('#theform').addClass('hidden') $('#theform').removeClass('hidden'); <div id="theform" c ...

"Text should be like a hidden secret, unseen yet powerful

Greetings! I have created an animation using Jquery However, I am facing an issue where the .text is visible while my info span is appearing and disappearing I need to retain that class in my .alert span In essence, what I am aiming to achieve is to mak ...

Evolving characteristics of Bootstrap popover

I am currently working on a text field and button setup where I have implemented a popover feature using Bootstrap. This is the code snippet I am using: function displayPopover() { $("#text").popover("show"); } The popover appear ...

CSS Styles Only Apply to the Initial Column on the Website

It seems like the css is only working on the first column to display the item-meta. Everything appears to be in place when inspected, but for some reason, the opacity does not change back to 1. It's strange because it works fine in the first column ev ...

Stylish Interactive Menu Item

Having a fixed navigation at the bottom of my website has presented me with an issue. The hover effect, specifically the background slide, triggers before I even place my mouse over the text. Currently, the background slides up when my mouse enters the .it ...

Enhance your website with dynamic effects by incorporating CSS3 columns and responsive layouts. Utilize CSS3 or jQuery/JavaScript to

I have decided to create a masonry style layout using CSS3 for the columns, which has made building the layout easier and more precise. This is especially useful as I am working on a responsive design. Currently, I am implementing CSS3 media queries to ad ...

The PHP email that was sent contains two empty fields

Looking for assistance with an issue in my PHP contact form. I found the code online and made some modifications, but I'm encountering a problem where two of the fields (email and state) are coming through as blank in the email, even though all other ...

Utilizing Bootstrap for Centering Content Vertically and Horizontally

My login form is designed with a simple layout using Bootstrap 3.3.7 and a wrapper class div. However, when viewed on a full browser screen, the text boxes overlap the labels. How can I adjust it so that the default bootstrap behavior is applied to the for ...

What is the most efficient method for tallying the occurrences of the character "." in a webpage?

I am looking to analyze the content of an html page and tally up the occurrences of "." (period). Below is a snippet of code that accomplishes this task by reading the html and displaying the desired results. While considering modifying the existing code, ...

Adjust the Bootstrap settings to center the title on the navbar and shift the logout button to the right side

Is there a way to centrally align the title "My project" in the navbar while also keeping the logout button on the right of the same line as the title? <div class="navbar navbar-inverse navbar-fixed-top" role="navigation"> <div class="contain ...

JQuery ajax fails to trigger the success function

Upon using an ajax request to insert data into the database, I encountered an issue where the button message did not update after the submission was successful. Initially, I set the button text to Please wait... upon click, and intended to change it to Don ...

Is it achievable to have a background image cover size with a responsive rollover effect?

I’m currently facing a unique challenge where I want to have an image as the background of my website, with the size set to cover the entire screen. On this background image, there are elements like buildings that I want to interact with when hovered ove ...

Showing Information in an HTML Table

I am new to the world of PHP programming and constantly searching for solutions to my problems. If anyone has any ideas, please share them - I greatly appreciate any help in solving this issue. Within my database table, I have data structured as follows: ...