HTML Tutorials

HTML - The id Attribute

Id Attribute in HTML

The HTML element's unique id is specified by the id property. It is employed to distinguish one piece on the page from another. This is helpful if you need to reference an element in JavaScript or need to style a particular one.

Key Points:

  • Uniqueness: Throughout the HTML page, every id value must be distinct.
  • Targeting: JavaScript can manipulate the DOM and CSS can target styles with ease.

Example:

<div id="mainContent">
    <p>This content is uniquely styled and accessed.</p>
</div>

The id in CSS can be used to apply certain styles:

#mainContent {
    padding: 20px;
    border: 1px solid black;
}

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HTML

Beginner 5 Hours

Id Attribute in HTML

The HTML element's unique id is specified by the id property. It is employed to distinguish one piece on the page from another. This is helpful if you need to reference an element in JavaScript or need to style a particular one.

Key Points:

  • Uniqueness: Throughout the HTML page, every id value must be distinct.
  • Targeting: JavaScript can manipulate the DOM and CSS can target styles with ease.

Example:

<div id="mainContent">
    <p>This content is uniquely styled and accessed.</p>
</div>

The id in CSS can be used to apply certain styles:

#mainContent {
    padding: 20px;
    border: 1px solid black;
}

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Frequently Asked Questions for HTML

  • HTML stands for HyperText Markup Language.
  • It is used to create the structure of web pages and web applications.
  • HTML defines elements such as headings, paragraphs, links, images, and other content.

  • Block-level elements (like <div>, <p>, <h1>) start on a new line and take full width.
  • Inline elements (like <span>, <a>, <strong>) stay within the flow of the text.
  • Understanding this helps with layout and styling.

  • A basic HTML page includes a <!DOCTYPE html> declaration, followed by <html>, <head>, and <body>.
  • The <head> section contains metadata like the title and links to stylesheets.
  • The <body> section contains all the visible content of the webpage.

  • The <meta> tag provides metadata such as page description, keywords, and author.
  • It helps browsers and search engines understand the content of the page.
  • One common use is specifying the character encoding: <meta charset="UTF-8">.

  • Forms collect user input using the <form> tag.
  • Inside a form, use <input>, <textarea>, <select>, and <button>.
  • The action attribute specifies where to send the form data.

  • The <label> tag defines a label for an input element.
  • It improves accessibility and allows users to click the label to focus the input.
    Example: <label for="email">Email:</label><input id="email">.

Comments in HTML are written between <!-- and -->.

Example:
<!-- This is a comment -->.
Comments are not displayed on the webpage and are used for documentation.

HTML entities are used to display reserved or special characters.

For example, &lt; displays < and &amp; displays &.
Use them to avoid confusion with actual HTML syntax.