CSS Function - rotateY()

The rotateY() function in CSS is used to rotate an element around the y-axis (vertical) on the two-dimensional surface. The result is a <transform-function> datatype.

The axis of rotation passes through the transform origin. Using the CSS property transform-origin, the transform origin can be changed and customized.

The rotation of the element created by the rotateY() function is specified by an <angle>. The movement of the rotation will be clockwise, if the angle value is positive and will be anti-clockwise if the value is negative.

Possible values

The function rotateY() can take only one parameter. It specifies the angle of rotation.

  • <angle>: Represented in degrees. A positive angle rotates the element in clockwise direction; whereas a negative value rotates it anti-clockwise.

Syntax

transform: rotateY(35deg) | rotateY(-35deg);

CSS rotateY() - Combination of Values

Following is an example of rotateY() function with a positive and negative angles as parameter:

<html>
<head>
<style>
   #container {
      display: flex;
   }
   #sample-div {
      height: 100px;
      width: 100pX;
      border: 2py solid black;
      background-image: url('images/logo.png');
      margin-bottom: 2em;
   }

   section {
      padding: 25px;
      border: 2px solid red;
   }

   .rotate-y-positive {
      transform: rotateY(45deg);
      background-image: url('images/logo.png');
   }

   .rotate-y-negative {
      transform: rotateY(-75deg);
      background-image: url('images/logo.png');
   }

   .rotate-y-turn {
      transform: rotateY(2.5turn);
      background-image: url('images/logo.png');
   }

   .rotate-y-grads {
      transform: rotateY(2grads);
      background-image: url('images/logo.png');
   }
</style>
</head>
<body>
   <div id="container">
      <section>
         <p>no rotation</p>
         <div id="sample-div"></div>
      </section>
      <section>
         <p>rotateY(45deg)</p>
         <div class="rotate-y-positive" id="sample-div"></div>
      </section>
      <section>
         <p>rotateY(-75deg)</p>
         <div class="rotate-y-negative" id="sample-div"></div>
      </section>
      <section>
         <p>rotateY(2.5turn)</p>
         <div class="rotate-y-turn" id="sample-div"></div>
      </section>
      <section>
         <p>rotateY(2grads)</p>
         <div class="rotate-y-grads" id="sample-div"></div>
      </section>
   </div>
</body>
</html>
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