jQuery toggleClass example

Toggle 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

function getCombinations(arr, k) {
  const results = [];

  function combine(start, combination) {
    if (combination.length === k) {
      results.push([...combination]);
      return;
    }

    for (let i = start; i < arr.length; i++) {
      combination.push(arr[i]);
      combine(i + 1, combination);
      combination.pop();
    }
  }

  combine(0, []);

  return results;
}

const inputArray = [1,2,3,4,5,6,7,8];
const k = 4;
const combinations = getCombinations(inputArray, k);
console.log(combinations);