jQuery addClass example

Change class name on click in jQuery

by SHELDON PASCIAK

HTML

<button>OK</button> &nbsp; https://source.unsplash.com/random/300x200 &nbsp; 
  
 ( <span id="here">
  
  </span> )
  
<br /><br />

<img id="test" src="" />

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
  color:white;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

// find elements
var banner = $("#banner-message")
var button = $("button")

// handle click and add class
button.on("click", function(){
 // banner.addClass("alt")
 var x=Math.floor(5+Math.random()*70)*10;
 var y=Math.floor(5+Math.random()*70)*10;
 
 $('#test').attr("src","https://source.unsplash.com/random/" + x + "x" + y);
 
 $('#here').html(  x + ", " + y);
})


 var x=Math.floor(5+Math.random()*70)*10;
 var y=Math.floor(5+Math.random()*70)*10;
 
 $('#test').attr("src","https://source.unsplash.com/random/" + x + "x" + y);
 
 $('#here').html(  x + ", " + y);