Button hover does not work after I change button color using JS

February 12, 2022

I have a button that has a color change when hovering. And in Script the button color changes when a click event occurs. However, Hover works when the page is loaded but after the color changes, it doesn’t work. The code is below:

var count = 1;

function setColor(btn, color) {
  var property = document.getElementById(btn);
  if (count == 0) {
    property.style.backgroundColor = "white";
    count = 1;
  } else {
    property.style.backgroundColor = color;
    count = 0;
  }
}

.button {
  background-color: #4caf50;
  /* Green */
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
}

.button1 {
  background-color: white;
  color: black;
  border: 2px solid #4caf50;
}

.button1:hover {
  background-color: red;
  color: black;
  border: 2px solid #4caf50;
}

<h2> Hoverable Buttons</h2>
<button id="buttonGreen" class="button button1" onclick="setColor('buttonGreen', '#122256')">
Green</button>

After I click the button event occurs and the color changes to dark blue and the hover do not work.

>Solution :

button click adds inline styles which have higher priority due to that hover property changes are ignored. You can add !important to get rid of the issue

.button1:hover {
     background-color: red !important;
     color: black !important;
     border: 2px solid #4caf50;
}

<html>
  <head>
    <style>
      .button {
        background-color: #4caf50; /* Green */
        border: none;
        color: white;
        padding: 16px 32px;
        text-align: center;
        text-decoration: none;
        display: inline-block;
        font-size: 16px;
        margin: 4px 2px;
        transition-duration: 0.4s;
        cursor: pointer;
      }

      .button1 {
        background-color: white;
        color: black;
        border: 2px solid #4caf50;
      }

      .button1:hover {
        background-color: red !important;
        color: black !important;
        border: 2px solid #4caf50;
      }
    </style>

    <script>
      var count = 1;
      function setColor(btn, color) {
        var property = document.getElementById(btn);
        if (count == 0) {
          property.style.backgroundColor = "white";
          count = 1;
        } else {
          property.style.backgroundColor = color;
          count = 0;
        }
      }
    </script>
  </head>

  <body>
    <h2>Hoverable Buttons</h2>
    <button
      id="buttonGreen"
      class="button button1"
      onclick="setColor('buttonGreen', '#122256')"
      ;
    >
      Green
    </button>
  </body>
</html>