The most commonly used and practical properties in HTML development include class, id, href, src, alt, and type. class is used to share styles or behaviors, and an element can have multiple classes; id uniquely identifies a specific element, suitable for anchor links or JS acquisition objects; href is used to specify a hyperlink or stylesheet resource path; src represents the source path of resources such as pictures and scripts; alt provides image alternative text to enhance accessibility and SEO; type defines input types, button behaviors, or script language types, such as text, password, submit, etc. These properties are critical to the functionality, appearance and accessibility of the page, and mastering them helps to develop a well-structured, fully functional web page.

In HTML development, there are some attributes that are frequently used by developers and are indispensable. These attributes not only determine the behavior and appearance of the tag, but also play a key role in the functionality and accessibility of the page. Listed below are some of the most common and practical HTML attributes.

class and id : used for style and script operations

These two properties are mainly used for CSS style control and JavaScript manipulation of DOM elements.

• class : Applicable to multiple elements that share the same style or behavior. An element can have multiple classes.
• id : Uniquely identifies a specific element, often used for anchor links or JS to obtain specific objects.

For example:

 <div class="content main" id="section1">This is the content</div>

• class="content main" means that this div has two class names at the same time;
• id="section1" guarantees that it is unique throughout the document.

Generally speaking, class is more commonly used in front-end development, while id is more suitable for unique identifiers.

href and src : The key to resource reference

These two attributes are used in tags such as <a> and <img src="/static/imghw/default1.png" data-src="image.jpg" class="lazy" alt="What are the most common attributes used with HTML tags?" > , respectively, and are used to specify the location of external resources.

• href : Used for hyperlinks (such as <a href="https://example.com"> ) or stylesheet introduction (such as <link rel="stylesheet" href="style.css"> ).
• src : represents the source path of resources such as pictures, scripts, videos, etc., such as <img src="/static/imghw/default1.png" data-src="image.jpg" class="lazy" alt="What are the most common attributes used with HTML tags?" > or <script src="main.js"> .

The difference is:

• href is "I want to jump to" or "I want to load this resource"
• src is "I need to get data from here to display"

If these two attributes are written incorrectly, the page function will be abnormal or the resource loading fails, so pay special attention to the path writing method.

alt : Alternative text for images to improve accessibility

The alt attribute appears in the <img src="/static/imghw/default1.png" data-src="logo.png" class="lazy" alt="What are the most common attributes used with HTML tags?" > tag to describe the content of the image. This text will be displayed when the image cannot be loaded.

 <img src="/static/imghw/default1.png"  data-src="logo.png"  class="lazy" alt="Company Logo">

Search engines will also read alt text to understand the meaning of the image, so using this attribute is also helpful for SEO.

suggestion:

• The description is clear and concise, avoiding the accumulation of keywords;
• If it is a decorative picture, you can leave alt="" blank.

type : defines the content type or input format

type appears in various tags, such as:

• <input type="text"> : Define the type of the input box;
• <button type="submit"></button> : defines the behavior of a button;
• <script type="text/javascript"></script> : Define script language types (the default is JS for modern browsers, but it is still recommended to retain them);

Common input types include:

• text
• password
• email
• checkbox
• radio

Different types of inputs will affect the user input method and browser verification logic.

Basically that's it. Although there are many attributes of HTML, the above are the most basic and commonly used in daily development. Mastering them well will allow you to write web pages with clear structure and complete functions.

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