CSS animation to pulse section of image

Question

I'm using CSS animation on a simple image.
I want the pulse animation only to target part of the image.
How I can make that pulse animation so that only the text "Trello" changes opacity?

Here is my code:

.element {
  /*animation-delay: 2s;*/
  animation: pulse 3s infinite;
  margin: 0 auto;
  display: table;
  margin-top: 50px;
  animation-direction: alternate;
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0.3;
  }
}

html,
body {
  height: 100%;
  background-color: #e74c3c;
}

<img src="https://d78fikflryjgj.cloudfront.net/images/50b4ebc64391dc394a38e73aed57f0e2/header-logo.png" alt="" class="element" />

View on CodePen

Solution

You can use this example for both. I hope it's helpful to you.

.pulse {
  animation: pulse 3s infinite;
  margin: 0 auto;
  display: table;
  margin-top: 50px;
  animation-direction: alternate;
  -webkit-animation-name: pulse;
  animation-name: pulse;
}
    
@-webkit-keyframes pulse {
  0% {
    -webkit-transform: scale(1);
  }
  50% {
    -webkit-transform: scale(1.1);
  }
  100% {
    -webkit-transform: scale(1);
  }
}
    
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

html,
body {
  height: 100%;
  background-color: #e74c3c;
}

<img src="https://d78fikflryjgj.cloudfront.net/images/50b4ebc64391dc394a38e73aed57f0e2/header-logo.png" alt="" class="pulse" />

Comments

[Taylor Foster]

If your trying to make the 'Trello' pulse and not the icon next to it, you are going to need to use two separate images and just throw the pulse animation on the image with the text.