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CSS Properties - Basic Exercises, Practice, Solution

[An editor is available at the bottom of the page to write and execute the scripts.]

41. How to set the rounded border to an element?

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Border-radius Properties</title>
</head>
<body>
</body>
</html>

Try it in the following editor or see the solution.

a. How to define the shape of the corner?

b. How to define the shape of the corners in percentage?

c. How to set initial property to its default value?

d. How to set the border radius animatable?

See the Pen html css common editor by w3resource (@w3resource) on CodePen.


Previous: How to set the width of the left border?
Next: How to set the style of the right border?

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HTML-CSS: Tips of the Day

Expand a div to fill the remaining width

The solution to this is actually very easy, but not at all obvious. You have to trigger something called a "block formatting context" (BFC), which interacts with floats in a specific way.

Just take that second div, remove the float, and give it overflow:hidden instead. Any overflow value other than visible makes the block it's set on become a BFC. BFCs don't allow descendant floats to escape them, nor do they allow sibling/ancestor floats to intrude into them. The net effect here is that the floated div will do its thing, then the second div will be an ordinary block, taking up all available width except that occupied by the float.

This should work across all current browsers, though you may have to trigger hasLayout in IE6 and 7. I can't recall.

Demos:

  • Fixed Left: http://jsfiddle.net/A8zLY/5/
  • Fixed Right: http://jsfiddle.net/A8zLY/2/
div {
  float: left;
}

.second {
  background: #ccc;
  float: none;
  overflow: hidden;
} 

<div>Tree</div>
<div class="second">View</div>