Forem: Raja B

Question And Answer

Raja B — Sun, 24 May 2026 15:32:49 +0000

What is the purpose of box-sizing: border-box in your project?

1. Purpose of box-sizing: border-box

box-sizing: border-box means: when you set width or height, that size already includes
padding and border.
So if you say width: 300px, the total box (content + padding + border) will be 300px, not bigger. This makes layouts easier and avoids unexpected overflow.

How does grid-template-columns: 2fr 1fr work?

2. How grid-template-columns: 2fr 1fr works

In CSS Grid, fr means “fraction of available space”.

grid-template-columns: 2fr 1fr creates 2 columns:

First column = 2 parts
Second column = 1 part
Total = 3 parts → first gets 2/3 of the width, second gets 1/3.

What is the difference between semantic tags like `<main>` and `<footer>` versus normal `<div>` tags?

3. Semantic tags (<main>, <footer>) vs <div>

<div>: no meaning, just a generic box. You use it only for layout/styling.
Semantic tags like <main>, <header>, <footer>, <nav>: names show what that section is

Search engines, screen readers, and other tools understand your page structure better.
So the browser looks almost the same, but semantic tags improve accessibility, SEO, and code readability.

Why is vh used instead of px?

4. Why use vh instead of px

px = fixed size, does not change with screen.
vh = “viewport height”. 1vh = 1% of browser window height.

If you write height: 100vh, the element will always match the screen height, so it’s good for full‑screen sections and responsive designs.

Difference between padding and margin?

5. Difference between padding and margin

Padding: space inside the element, between content and border. Makes the content “breathe” inside the box.
Margin: space outside the element, between this element and other elements.

Shortcut:

Padding = “inner space”
Margin = “outer space”

Difference between Grid and Flexbox?

6. Difference between Grid and Flexbox

Flexbox: one-dimensional → you mainly control layout in one direction (row or column). Great for navbars, buttons in a row, etc.
Grid: two-dimensional → you control rows and columns together. Great for full page layouts, dashboards, card grids, etc.

What are self-closing tags?

7. What are self‑closing tags

Self-closing tags are elements that do not have content inside and traditionally don’t need a separate closing tag. Examples:

<img>, <br>, <hr>, <input>, <meta>, <link>.
In HTML5 you usually write them as <img src="..."> (no need for </img>).

What is the purpose of the meta viewport tag?

8. Purpose of the meta viewport tag

Typical code:

<meta name="viewport" content="width=device-width, initial-scale=1.0">

This tells the browser on mobile:

Page width = device screen width
Start at normal zoom (no auto zoom‑out)
So the page becomes mobile-friendly and responsive.

Reference:

perplexity.ai

NonSemantic Tags in HTML

Raja B — Sun, 24 May 2026 14:31:54 +0000

What are Non Semantic Tags in HTML?

Non semantic tags are HTML tags that do not tell you what kind of content they contain. They are just general-purpose containers with no clear meaning.

Let’s understand step-by-step.

1. What Does “Non Semantic” Mean?

The word “non semantic” means “no meaning.” So, non semantic tags don’t tell anything about what’s inside them.

For example, if you see:

<div>This is something</div>

You have no idea what “something” is. It could be: - a paragraph - a form - a sidebar - a heading - or anything else. This is why it’s called non semantic — it doesn’t give meaning to the content.

2. Why Are Non Semantic Tags Used?

Even though they don’t have meaning, non-semantic tags are still very useful. Here’s why developers use them:

a) Flexible Containers
You can put any content inside a non semantic tag. It acts like an empty box or a wrapper.

b) Grouping Elements
They help you group multiple elements together to apply styles or scripts.

For example:

<div class="card">
  <h2>Title</h2>
  <p>Description</p>
</div>

Here, the <div> groups the title and paragraph so you can style them as one unit.

c) Used with CSS and JavaScript
You can add classes or IDs to these tags to apply CSS styles or add JavaScript functionality.

3. Common Non Semantic Tags

Here are the most common non semantic tags:

Tag	Meaning (in simple words)
<div>	A container or block-level box (used for layout)
<span>	An inline container (used for small styling)

1. <div>: It’s short for “division”. It’s used to create sections or blocks in a webpage.
Example: <div class="footer">This is footer</div>

2. <span>: It’s used for inline elements, like styling a single word or phrase inside a sentence.
Example: <p>This is a <span class="highlight">special</span> word.</p>

4. When Should You Use Non Semantic Tags?

There is no suitable semantic tag for your content
You are just grouping elements for design or scripting
You want full control using CSS or JavaScript
You are creating custom layouts that don’t fit standard tag meanings

Will be learn

Non-semantic tags are like blank boxes in HTML. They don’t explain what’s inside, but they help you group and control content using CSS or JavaScript.

The most common non semantic tags are:

<div> — for block-level containers
<span> — for inline-level containers

Use them wisely when there is no meaningful tag available.

Reference:

https://eduitlearning.in/semantic-and-non-semantic-tags/

Semantic Tags in HTML

Raja B — Sun, 24 May 2026 11:41:13 +0000

What are Semantic Tags in HTML?

Semantic tags are HTML tags that clearly describe the meaning or purpose of the content inside them.

semantic means “with meaning.” So, a semantic tag tells both the developer and the browser what the content is about.

Let’s break it down step by step.

1. Why Are They Called “Semantic”?

The word “semantic” comes from “meaning.”
When you use semantic tags, you’re telling the browser, “Hey, this part is a heading” or “This section is a navigation bar” or “This area is the main content.”

This helps:

Browsers understand how to display it
Search enginesunderstand what’s important
Screen readers(used by blind users) read the content properly
A semantic tag (like , , , etc.) clearly tells you what the content is for.

Example:

<article>This is a blog post</article>

Now, even without looking at the content, we know it’s a blog post, because it’s inside an <article>tag.

2. Why Should You Use Semantic Tags?

Using semantic tags has many benefits:

a) Improves Code Readability

When other developers (or even future-you) read your HTML code, it’s easier to understand.

Instead of seeing this:

<div id=”header”>

<div id=”nav”>

<div id=”main”>

You can write this:

<header>

<nav>

<main>

This is much cleaner and meaningful.

b) Helps Search Engines (SEO)

Search engines like Google look at your HTML tags to decide what your page is about.

Using semantic tags helps them:

Index your site correctly
Show your site in search results more accurately

c) Better for Accessibility

People who can’t see use screen readers. These tools read your HTML and speak it aloud.

If you use proper tags, the tool can say:

“This is the main content”
“This is a navigation menu”
“This is a footer”

This gives a better experience for disabled users.

d) Future-Proof Your Code

Browsers and tools are built to understand semantic tags better. They may add new features, improve performance, or give better support in future updates if your code is semantic.

Semantic Tags

Tag          Meaning (in simple words)
<header>     Top part of the page (like a title or logo)
<nav>            Navigation menu (links to other pages)
<main>           Main content area of the page
<section>    A section of content (like a chapter)
<article>    An independent piece (like a blog post)
<aside>          Side content (like ads or side notes)
<footer>     Bottom part of the page (like copyright)
<figure>     A picture or diagram with a caption
<figcaption>     The caption for a figure or image
<time>           Shows a date or time value
<mark>           Highlights important text
<address>    Contact information
<summary>    Summary of collapsible content
<details>    Expandable section for hidden content

3. Do Semantic Tags Affect How the Website Looks?

No, not directly. Semantic tags don’t change the appearance of the webpage by default.

You need to use CSS to style them. But their main job is to add meaning, not design.

4. Where Are Semantic Tags Used?

You use semantic tags almost everywhere in an HTML document:

Website layout (header, footer, main)
Blog posts (article, section)
Menus (nav)
Images with captions (figure, figcaption)

They make the entire HTML page more understandable.

Will be learn

Semantic tags are like labels that explain what each part of your page does.

Without them, your HTML is just a pile of boxes.
With them, it becomes a well-organized, meaningful structure that is:

Easier to read
Easier to maintain
Better for Google
Better for users

Reference:

HTML and CSS Basic

Raja B — Sun, 17 May 2026 13:42:58 +0000

HTML and CSS,

every element is considered a rectangular "box". This concept is known as the CSS Box Model, which determines how elements are sized and spaced on a webpage

The Four Layers of the Box Model

Each box consists of four distinct areas, layered from the inside out: -

Content Box:

The inner area where the actual text, images, or child elements reside -

Padding Box:

The transparent space between the content and the border. It inherits the background of the element. -

Border Box:

A stroke or line that wraps around the padding and content -

Margin Box:

The outermost transparent area that creates space between the element and its neighbors.

Visualization

![CSS Box model] (https://devtouploads.s3.amazonaws.com/uploads/articles/er2utzn5gdvhrcejdche.png)

Key Box Properties

Box Sizing (box-sizing):

content-box (Default):

Width and height apply only to the content. Padding and borders are added on top, increasing the element's total size.

border-box:

Width and height include content, padding, and border. This makes layout sizing more predictable.

Display Types
Block Elements:
Take up the full width available and start on a new line (e.g., <div>, <h1>, <p>).
Inline Elements:
Only take up as much width as necessary and do not start on new lines (e.g., <span>, <a>).What to learn first

Start with these HTML basics:

Page structure: <!DOCTYPE html>, <html>, <head>, <body>.

Text tags:<h1>, <p>, <strong>, <em>.

Links and images: <a>, <img>.

Lists and tables: <ul>, <ol>, <table>.

Forms: <input>, <button>, abel>.

Then learn these CSS basics:

Selectors.

Colors and backgrounds.

Fonts and text styling.

Box model: margin, padding, border.

Layout with Flexbox and Grid.

Responsive design with media queries.

Reference:

https://www.w3schools.com/htmlcss/htmlcss_intro.asp

Basic of HTML

Raja B — Fri, 15 May 2026 16:48:12 +0000

What is HTML?

HTML is one of the most widely used markup languages in web design worldwide. Its strengths lie in its uniform, clearly structured syntax, a free open-source approach, and a rapid learning curve. If you want to get a quick start in web design without a lot of effort, HTML is a great way to design a modern, appealing website with interactive elements.

What does HTML stand for?

HTML stands for “Hypertext Markup Language” and, along with Java and CSS, is one of the most widely used text-based markup languages in the world. Tim Berners-Lee, the inventor of the World Wide Web, laid the foundation of HTML in 1992 with the first HTML specification. The World Wide Web Consortium (W3C) declared HTML 4.0 to be the official standard in December 1999. Since then, about 63% of all websites are based on HTML code. Currently (as of 2023), the versions XHTML and HTML5 are the most widely used for creating SEO-optimized websites.

Is HTML a programming language?

HTML isn’t a programming language. Unlike programming and scripting languages like PHP or JavaScript, HTML cannot be used to create algorithms, tasks, conditions, or loops due to its lack of command structure. That’s why HTML belongs to the markup languages. While HTML describes and structures a web page with text-based, static syntax, programming languages create dynamic content, complex logical tasks, commands, and algorithms.

HTML: HyperText Markup Language

HTML (HyperText Markup Language)

is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally used to describe a web page's appearance/presentation (CSS) or functionality/behavior (JavaScript).

"Hypertext"

refers to links that connect web pages to one another, either within a single website or between websites. Links are a fundamental aspect of the Web. By uploading content to the Internet and linking it to pages created by other people, you become an active participant in the World Wide Web.

HTML uses

"markup"

to annotate text, images, and other content for display in a Web browser. HTML markup includes special "elements" such as

<head>, <title>, <body>, <header>, <footer>, <article>, <section>, <p>, <div>, <span>, <img>, <aside>, <audio>, <canvas>, <datalist>, <details>, <embed>, <nav>, <search>, <output>, <progress>, <video>, <ul>, <ol>, <li>

and many others.

Basic structure of an HTML document

<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>

<h1>My First Heading</h1>
<p>My first paragraph.</p>

</body>
</html>

Example Explained:

The <!DOCTYPE html> declaration defines that this document is an HTML5 document
The element is the root element of an HTML page
The <head> element contains meta information about the HTML page
The <title> element specifies a title for the HTML page (which is shown in the browser's title bar or in the page's tab)
The <body> element defines the document's body, and is a container for all the visible contents, such as headings, paragraphs, images, hyperlinks, tables, lists, etc.
The<h1>element defines a large heading
The<p>element defines a paragraph

The syntax

is used in HTML to add notes, explanations, or to disable code that you do not want the browser to display

Short Key for Comments:

To quickly comment out a line or a selected block of code, use these shortcuts in VS Code, Sublime Text, and many other IDEs:

Windows / Linux :

Ctrl + /
macOS :

Cmd + /

Key Points

What it does :

Allows you to leave notes to yourself or others without the text appearing on the web page.

Debugging :

Useful for hiding code temporarily to find errors.

Alternative :

For CSS/JS, use /* comment */. For Python, use # comment.

Multi-line :

On some platforms, Shift + Alt + A (Windows)
or Shift + Option + A (Mac) can be used for block comments.

Forem: Raja B

Question And Answer

What is the purpose of box-sizing: border-box in your project?

How does grid-template-columns: 2fr 1fr work?

What is the difference between semantic tags like <main> and <footer> versus normal <div> tags?

Why is vh used instead of px?

Difference between padding and margin?

Difference between Grid and Flexbox?

What are self-closing tags?

What is the purpose of the meta viewport tag?

Reference:

NonSemantic Tags in HTML

What are Non Semantic Tags in HTML?

1. What Does “Non Semantic” Mean?

2. Why Are Non Semantic Tags Used?

3. Common Non Semantic Tags

4. When Should You Use Non Semantic Tags?

Will be learn

Reference:

Semantic Tags in HTML

What are Semantic Tags in HTML?

1. Why Are They Called “Semantic”?

2. Why Should You Use Semantic Tags?

a) Improves Code Readability

b) Helps Search Engines (SEO)

Will be learn

Reference:

HTML and CSS Basic

HTML and CSS,

The Four Layers of the Box Model

Content Box:

Padding Box:

Border Box:

Margin Box:

Visualization

Key Box Properties

Box Sizing (box-sizing):

content-box (Default):

border-box:

Display Types

Block Elements:

Inline Elements:

Start with these HTML basics:

Then learn these CSS basics:

Reference:

Basic of HTML

What is HTML?

What does HTML stand for?

Is HTML a pro­gram­ming language?

HTML: HyperText Markup Language

HTML (HyperText Markup Language)

"Hypertext"

"markup"

Basic structure of an HTML document

is used in HTML to add notes, explanations, or to disable code that you do not want the browser to display

Short Key for Comments:

Key Points

What it does :

Debugging :

Alternative :

Multi-line :

Reference :

What is the difference between semantic tags like `<main>` and `<footer>` versus normal `<div>` tags?

Is HTML a programming language?