The alt attribute provides alternative information for an image if a user cannot view it. The alt attribute should be used to describe any images except those which only serve a decorative purposes, in which case it should be left empty.
div is a block elementspan is inline element For bonus points, you could point out that it’s illegal to place a block element inside an inline element, and that while div can have a p tag, and a p tag can have a span, it is not possible for span to have a div or p tag inside.
If you are working with an HTML5 page, the <mark> tag can be a quick and easy way of highlighting or marking text on a page:
<mark>highlighted text</mark>To highlight text with just HTML code and support for all browsers, set the background-color style, as shown in the example below, using the HTML tag.
<span style="background-color: #FFFF00">Yellow text.</span>HTML5 was designed to replace HTML 4, XHTML, and the HTML DOM Level 2. The key goals and motivations behind the HTML5 specification were to:
To display an HTML page correctly, a web browser must know which character set (character encoding) to use. This is specified in the tag:
HTML4:
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">HTML5:
<meta charset="UTF-8">In HTML5 it is not strictly necessary to close certain HTML tags. The tags that aren’t required to have specific closing tags are called “self closing” tags.
An example of a self closing tag is something like a line break (<br />) or the meta tag (<meta>). This means that the following are both acceptable:
<meta charset="UTF-8">
...
<meta charset="UTF-8" />It is possible to get indexed better by placing the following two statements in the <HEAD> part of your documents:
<META NAME="keywords" CONTENT="keyword keyword keyword keyword">
-<META NAME="description" CONTENT="description of your site">Both may contain up to 1022 characters. If a keyword is used more than 7 times, the keywords tag will be ignored altogether. Also, you cannot put markup (other than entities) in the description or keywords list.
<header> is used to contain introductory and navigational information about a section of the page. This can include the section heading, the author’s name, time and date of publication, table of contents, or other navigational information.
<article> is meant to house a self-contained composition that can logically be independently recreated outside of the page without losing it’s meaining. Individual blog posts or news stories are good examples.
<section> is a flexible container for holding content that shares a common informational theme or purpose.
<footer> is used to hold information that should appear at the end of a section of content and contain additional information about the section. Author’s name, copyright information, and related links are typical examples of such content.
Attributes are defined on the HTML markup but properties are defined on the DOM. To illustrate the difference, imagine we have this text field in our HTML: <input type="text" value="Hello">.
const input = document.querySelector('input');
+<META NAME="description" CONTENT="description of your site">Both may contain up to 1022 characters. If a keyword is used more than 7 times, the keywords tag will be ignored altogether. Also, you cannot put markup (other than entities) in the description or keywords list.
<header> is used to contain introductory and navigational information about a section of the page. This can include the section heading, the author’s name, time and date of publication, table of contents, or other navigational information.
<article> is meant to house a self-contained composition that can logically be independently recreated outside of the page without losing it’s meaining. Individual blog posts or news stories are good examples.
<section> is a flexible container for holding content that shares a common informational theme or purpose.
<footer> is used to hold information that should appear at the end of a section of content and contain additional information about the section. Author’s name, copyright information, and related links are typical examples of such content.
Attributes are defined on the HTML markup but properties are defined on the DOM. To illustrate the difference, imagine we have this text field in our HTML: <input type="text" value="Hello">.
const input = document.querySelector('input');
console.log(input.getAttribute('value')); // Hello
console.log(input.value); // HelloBut after you change the value of the text field by adding "World!" to it, this becomes:
console.log(input.getAttribute('value')); // Hello
console.log(input.value); // Hello World!The HTML <small> element makes the text font size one size smaller (for example, from large to medium, or from small to x-small) down to the browser's minimum font size. In HTML5, this element is repurposed to represent side-comments and small print, including copyright and legal text, independent of its styled presentation.
Consider:
<img src="image.jpg" alt="London by night">