HTML Headings and Comments

HTML Comments

HTML Headings

HTML offers six levels of headings, using paired tags, from Heading 1 ( <h1> ... </h1>) to Heading 6 ( <h6> ... </h6>).
Each browser displays the headings in boldface, using its default font and descending font sizes, from Heading 1 (the biggest) to Heading 6 (the smallest).
- You can add CSS styles to change the Heading's font size, color, and other properties..

Use <h1>, <h2>, ..., for headings only.
Headings are important, search engines use document headings to index the structure and content of your web pages.

- Example:

<!DOCTYPE html>
<html>
<head>
<title>Example Headings</title>
</head>
<body>
<h1>Heading 1</h1>
<h2>Heading 2</h2>
<h3>Heading 3</h3>
<h4>Heading 4</h4>
<h5>Heading 5</h5>
<h6>Heading 6</h6>
</body>
</html>

HTML Comments

Comments are used to insert notes into the document that are not displayed by the browser.
To add a comment, use the  tag, placing the comment between the two pairs of dashes.

- Example:

<h4>Example HTML with Comments</h4>
<!-- This is a comment, Start Menu -->
<ul>
 <li>Menu one</li>
 <li>Menu two</li>
</ul>
<!-- End Menu -->

Comments can be any length and are not restricted to one line.
Although browsers don't display comments when they display the web page, they can be viewed in the source code of the web page.
- To view the source code for the page currently displayed in Google Chrome browser, right-click on the page, then click View Page Source (or Ctrl+U).
- To view the source code in Mozilla Firefox, click the View menu, and then click Page Source (or Ctrl+U).

<<-Building and editing HTML .. -- Paragraphs, Line break, Horizontal ..->>

Daily Test with Code Example

HTML

CSS

JavaScript

PHP-MySQL

Which attribute is used in <a> tag for the address of the link?

src href rel

<a href="http://coursesweb.net/" title="CoursesWeb.net">CoursesWeb.net</a>

Which CSS property sets the type of the text font?

font-family text-decoration font-size

h2 {
  font-family:"Calibri",sans-serif;
}

What instruction selects all the <div> tags with class="cls"?

querySelector("div.cls") getElementsByTagName("div") querySelectorAll("div.cls")

var elm_list = document.querySelectorAll("div.cls");
var nr_elms = elm_list.length;       // number of selected items
alert(nr_elms);

Indicate the function that can be used to get the sum of values in an array.

array_sum() array_diff() array_shift()

$arr =[1, 2, 3, 4);
$arr_sum = array_sum($arr);
echo $arr_sum;       // 10

Last accessed pages

JavaScript trim, rtrim and ltrim ⁽⁸⁷³⁹⁾
Splat Operator in PHP ⁽²⁵⁹⁷⁾
Dynamic variables in JavaScript ^(15504)
Selection Tools ⁽⁶⁸⁸³⁾
Transparent Background, but not the text-content on it ⁽²²⁶⁹⁾

Popular pages this month

Courses Web: PHP-MySQL JavaScript Node.js Ajax HTML CSS ⁽⁸¹¹⁾
SHA256 Encrypt hash in JavaScript ⁽⁷³⁴⁾
Create simple Website with PHP ⁽⁶⁹⁰⁾
Read Excel file data in PHP - PhpExcelReader ⁽⁶⁸⁹⁾
PHP Unzipper - Extract Zip, Rar Archives ⁽⁶⁸³⁾