Three New Tags

The Start Attribute Tag

By default, an ordered list will start counting from One. The start attribute is used to start counting from a specified number:

50. Feta
51. American
52. Swiss

50. Feta
51. American
52. Swiss

The code that produced the output above looks like this:

<ol start="50">
<li> Feta </li>
<li> American </li>
< li > Swiss </li >
</ol>

<ol type="I" start="50">
<li> Feta </li>
<li> American </li>
<li> Swiss </li>
</ol> 
 
 

I found this tag at w3schools.com

Expansion Panel Tag

This tag is used to add an expansion panel to the webpage.

The code that produced the output above looks like this:

< details >
<summary> Favorite Cheese </summary>
< p > My favorite cheese is American.  < /p > 
< /details >
   

I found this tag at medium.com

The Mark Tag

This tag is used to highlight something on a webpage.

American cheese is the most superior cheese.

The code that produced the output above looks like this:

 
 < p >
  American cheese is the most < mark > superior < /mark> cheese.
< /p >

I found this tag at webdesign.tutsplus.com