jQuery addClass example

Change class name on click in jQuery

by SHELDON PASCIAK

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Change color</button>
</div>

CSS

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

#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

var arr = [
    { id:5, name:"a" },
    { id:4, name:"b" },
    { id:6, name:"c" },
    { id:3, name:"d" }
],

// generic comparison function
cmp = function(x, y){
    return x > y ? 1 : x < y ? -1 : 0; 
};
arr.sort(function(a, b){
    return cmp( 
        [cmp(a.name, b.name), cmp(a.id, b.id)]);
});
//sort name ascending then id descending
arr.sort(function(a, b){
    //note the minus before -cmp, for descending order
    return cmp( 
        [cmp(a.name, b.name), -cmp(a.id, b.id)], 
        [cmp(b.name, a.name), -cmp(b.id, a.id)]
    );
});

alert(JSON.stringify(arr));