Part 1 - Elements and tags§

Step 1 - Two sides of an HTML page: code and display§

  • Open page0.html in a web browser. Don’t close it.
  • Open page0.html in a text editor and observe the code. Don’t close this file neither.
  • Learn to switch between the text editor and the browser, for example, by using Alt+Tab on the keyboard.

Step 2 - Your first edit§

  • Edit the code of the page0.html in the text editor. For example, add your firstname where it should be.
  • Save your changes in the text editor.
  • Reload the page in the browser and make sure your changes are visible.

Warning

Learn the shortcuts: F5 to reload the page in the browser, Ctrl+S to save your file in the editor.

Remember...§

  • Do not forget to save your edits in the text editor before refreshing a page.
  • You do not need to close the editor nor the web browser.
  • The Alt+Tab shortcut is convenient to switch between the two applications.

Step 3 - HTML tags§

HTML is based on elements. An element indicates that a part of the document has a specific role.

For example, if you want to stress your name in the sentence, you can use the em element.

The em element is identified by a start tag and a end tag.

Here is an example. Try it!

My name is <em>Amélie</em>

And this is the result:

My name is Amélie

Understanding HTML tags§

Most of the time, HTML elements have a start tag and a end tag.

Tags names are written inside angle brackets (greater than & less than symbols: “<” & “>”)

In the end tag, the tag name is preceded with a forward slash (/) sign.

For the element em, the start tag and end tag are:

<em> and </em>

Step 4 - Let’s try another tag§

This is your first web page, it is very important!

Try to use the <strong> tag around the word first in the web page.

Admire the result in your browser.

Step 5 - More HTML tags§

  • Open page1.html on your text editor and on your web browser (a good idea is to use a new tab in both cases).

  • Hum... the presentation is not what we expect. Let’s change that!
    • The tag <h1> is for headings. Use it to define the title of the page.
    • The tag <p> is for paragraph. Try it!

  • Check the result on your web browser.

Step 6 - Image (1/3)§

It’s time to add an image in your page.

The element for including an image is img and the corresponding tag is <img>.

Here is an example:

<img src="TBL.jpg" alt="Inventor of the Web: Tim Berners Lee">

And this is the result:

Inventor of the Web: Tim Berners Lee

Step 6 - Image (2/3)§

<img src="mypicture.png" alt="This is my picture">

This tag has something new: alt and src are attributes.

Attributes specify behaviors of the tag.

Here, the src attribute indicates where to find the image, and the alt attribute defines an alternative text that will be displayed if the image cannot be loaded.

Warning

An img tag does not need a closing tag. It is quite rare.

Step 6 - Image (3/3)§

Using the img tag you have just learned, include in page1.html a photo of Sir Tim Berners Lee. You will find and image in the directory named images.

Be careful, as the photo is in the images directory, and because it is named “Sir_Tim_Berners_Lee.jpg”, the alt attribute should be: alt="images/Sir_Tim_Berners_Lee.jpg.

Summary§

HTML is the language we use to build web pages.

A web browser reads HTML code and interprets it to display the corresponding web page.

HTML defines many elements and is written with tags (start tag and end tag) such as <p> and </p>.

Some elements may have attributes such as in the followig example:

<a href="page3.html">This is a link to page 3</a>