Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

interview

home / developersection / interviews / what is opacity in css (cascading style sheet)?
Ask Question
Abhishek Srivasatava
Abhishek Srivasatava

Employee

Message

1 Answers

Abhishek Srivasatava
Abhishek Srivasatava 14 Oct 2016
Report Abuse

It can be define as the transparency of any image, block etc.

For defining opacity in CSS we need to remember keyword OPACITY ( Filter it is used in internet explorer.) 

Img 
{
Opacity: 0.5
Filter: alpha (opacity =50)
}

Opacity value can be in between 0-1.

It can be use for hover case.

How it can be use in the CSS programming?

Img:hover
{
Opacity:1.0
}

Writing some text in inside transparent box

<!DOCTYPE html>
<html>
<head>
<style>
div.backgnd {
  background: red;
  border: 2px solid black;
}
div.boxtrns {
  margin: 30px;
  background-color: blue;
  border: 1px solid black;
  opacity: 0.6;
  filter: alpha(opacity=60); /* For IE8 and earlier */
}
div.transbox p {
  margin: 20px;
  font-weight: bold;
  color: green;
}
</style>
</head>
<body>
<div class="backgnd">
  <div class="boxtrns">
    <p>Text of transparaent block</p>
  </div>
</div>
</body>
</html>

MindStick Training