CSS display
With the display property you can specifies if or how an HTML element is displayed in the web page.
- Values:
- inline - Sets the element to be displaied as an inline element (like <span>, <a>), it has no line break and takes up as much width as necessary.
- block - Creates a block box. A block element takes up the full width available, and has a line break before and after it.
- inline-block - The element will generate a block box, laid out as an inline box, similar to the image behavior
- list-item - Creates a block box for the content and the list item marker.
- none - Removes the element from the page layout entirely. It remains in the HTML code but will not be displayed in the browser window, makes it completely invisible.
- Syntax:
display: value;
Example (remove a DIV, displays <a> tags as block elements and <li> with inline):
<style>
#idd { display: none; }
.a_block { display: block; }
#idu li { display: inline; }
</style>
<h4>Example CSS display </h4>
<p>In this HTML page a Div is not shown, displays A tags as block elements and LI with inline.</p>
<div id='idd'>Removed content.</div>
<a href='//coursesweb.net/css' title='CSS course' class='a_block'>CSS course</a> <a href='//coursesweb.net/html' title='HTML course' class='a_block'>HTML course</a>
<ul id='idu'>
<li>List 1</li>
<li>List 2</li>
<li>List 3</li>
</ul>
CSS visibility
The visibility property can control if an element is visible or not. Even if the element is hidden, still affects layout and will take up space on the web page, where it should to be displayed.
- Values:
- visible - The element is visible (default).
- hidden - The element is invisible.
- Syntax:
visibility: value;
Example (make a <span> invisible):
<style>
#idd span { visibility: hidden; }
</style>
<h4>Example CSS visibility</h4>
<div id='idd'>This row contains a text <span>in a SPAN tag</span> that is hidden but still takes up space.</div>
CSS clip - Define the visible portion of an element
Defining the visible surface of an element determines its visible portion. The remaining contents of that element does not disappear, but is invisible to the visitor.
The element must have set
position:absolute, then, to define the visible region it's used the
clip property with
rect value that sets the shape of the visible region.
- Values:
- rect(top, right, bottom, left) - defines the region of the visible portion.
- auto - No clipping will be applied (default).
- Syntax:
clip: value;
Example:
<style>
#idd {
position: absolute;
clip: rect(0, 200px, 23px, 60px);
}
</style>
<h4>Example CSS clip</h4>
<div id='idd'>Free CSS: coursesweb.net/css</div>
Daily Test with Code Example
HTML
CSS
JavaScript
PHP-MySQL
Which tag defines the clickable areas inside the image map?
<map> <img> <area><img src="image.jpg" usemap="#map1">
<map name="map1">
<area shape="rect" coords="9, 120, 56, 149" href="#">
<area shape="rect" coords="100, 200, 156, 249" href="#">
</map>
Which CSS property defines what is done if the content in a box is too big for its defined space?
display overflow position#id {
overflow: auto;
}Click on the event which is triggered when the mouse is positioned over an object.
onclick onmouseover onmouseoutdocument.getElementById("id").onmouseover = function(){
document.write("Have Good Life");
}Indicate the PHP variable that contains data added in URL address after the "?" character.
$_SESSION $_GET $_POSTif(isset($_GET["id"])) {
echo $_GET["id"];
}
