HTML Image Tag and Attributes

The HTML <img> tag is used to embed images in a webpage. It is a self-closing tag, meaning it does not have a closing </img> tag. The <img> tag has several attributes that define the image source, appearance, and behavior.

Basic Syntax

<img src="image.jpg" alt="Description of image">

Attributes of <img> Tag

  1. src (Source)

    • Specifies the path to the image file.
    • Can be a relative path (images/photo.jpg) or an absolute URL (https://example.com/photo.jpg).
    • Required attribute.
    <img src="image.jpg" alt="Sample Image">

  2. alt (Alternative Text)

    • Provides a textual description of the image for accessibility.
    • Shown when the image cannot be loaded or viewed.
    • Helps with SEO (search engine optimization).
    • Recommended attribute.
    <img src="image.jpg" alt="A beautiful sunrise">

  3. width and height

    • Define the dimensions of the image.
    • Can use pixels (px) or percentages (%).
    • Helps browsers reserve space for the image during page load.
    <img src="image.jpg" alt="Sample Image" width="300" height="200">

  4. title

    • Provides additional information about the image as a tooltip when hovered over.
    <img src="image.jpg" alt="Sample Image" title="Hover text">

  5. loading

    • Defines how and when the image should be loaded.
      • lazy: Delays loading the image until it’s near the viewport.
      • eager: Loads the image immediately.
    <img src="image.jpg" alt="Sample Image" loading="lazy">

  6. crossorigin

    • Specifies if the image should be loaded with CORS (Cross-Origin Resource Sharing).
      • anonymous: Loads the image without credentials.
      • use-credentials: Loads the image with credentials like cookies.
    <img src="image.jpg" alt="Sample Image" crossorigin="anonymous">

  7. referrerpolicy

    • Controls the referrer information sent when loading the image.
      • Common values: no-referrer, origin, same-origin.
    <img src="image.jpg" alt="Sample Image" referrerpolicy="no-referrer">

Example: Complete <img> Tag

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>HTML Image Example</title>
</head>
<body>
  <h1>HTML Image Example</h1>
  <img 
    src="sunrise.jpg" 
    alt="A beautiful sunrise over the mountains" 
    width="600" 
    height="400" 
    title="Sunrise Photo" 
    loading="lazy"
  >
</body>
</html>

Comments

Post a Comment

Popular posts from this blog

Introduction to Computer

Image
Computers are electronic devices that are designed to process, store, and retrieve data. They are used for a wide variety of purposes, from personal computing to complex scientific simulations and industrial automation. A computer consists of various hardware components, including a central processing unit (CPU), memory, storage devices, input/output (I/O) devices such as keyboards, mice, and displays, and various other peripherals. Computers communicate with each other over networks, which are interconnected groups of computers that share resources and information. The internet is a global network that connects millions of computers around the world and enables communication and information sharing on an unprecedented scale. The field of computer science is concerned with the study of computers and computational systems, including their design, development, and application. It encompasses many subfields, including artificial intelligence, computer graphics, databases, programming lang...
Read more

History of Computer

Image
  History of Computer Topics  Definition of computer  Earliest computer  Computer History  Computer Generations Definition of Computer  Computer is a programmable machine.  Computer is a machine that manipulates data according to a list of instructions.  Computer is any device which aids humans in performing various kinds of computations or calculations.  Definition of Computer Three principles characteristic of computer:  It responds to a specific set of instructions in a well-defined manner.  It can execute a pre-recorded list of instructions.  It can quickly store and retrieve large amounts of data.  Earliest Computer  Originally calculations were computed by humans, whose job title was computers.  These human computers were typically engaged in the calculation of a mathematical expression.  The calculations of this period were specialized and expensive, requiring years of training in mathematics.  T...
Read more

Computer Generation

Image
 There are five generations of computer:  First generation– 1946 - 1958  Second generation– 1959 - 1964  Third generation– 1965 - 1970  Fourth generation– 1971 - today  Fifth generation– Today to future The First Generation   The first computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms.  They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat, which was often the cause of malfunctions. The Second Generation   Transistors replaced vacuum tubes and ushered in the second generation of computers.  One transistor replaced the equivalent of 40 vacuum tubes.    Allowing computers to become smaller, faster, cheaper, more energy-efficient and more reliable.  Still generated a great deal of heat that can damage the computer. The Third Generation  The development of the integrated circuit was ...
Read more