<h1>Change my outline</h1>

<select name="" id="select">
  <option value="none">none</option>
  <option value="dotted">dotted</option>
  <option value="dashed">dashed</option>
  <option value="solid">solid</option>
  <option value="double">double</option>
  <option value="groove">groove</option>
  <option value="ridge">ridge</option>
  <option value="inset">inset</option>
  <option value="outset">outset</option>
</select>

<input type="range" max="40" step="1" value="20">

<pre class="code-container">
  <span class="token-selector">h1</span> {
    <span class="token-property">outline-width</span>: <span class="token-function width">20px</span>;
    <span class="token-property">outline-style</span>: <span class="token-function style">solid</span>;
  }
</pre>

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 40px;
  min-height: 100vh;
    background-image: linear-gradient(135deg, #ff7a18, #af002d);    
}

h1 {
  display: block;
  font-size: 2em;
  color: #fff;
  padding: 4em 2em;
  outline: 20px solid #fff;
}

select {
  display: block;
  width: 200px;
  border: 1px solid #fff;
  background: transparent;
  color: #fff;
  padding: 16px;
  outline: 0;
}

option {
  display: block;
  padding: 16px;
  color: #333;
}

input {
  width: 200px;
}

output {
  display: block;
}

.code-container {
  width: 375px;
  max-width: 100%;
  overflow-x: auto;
  text-align: initial;
  background-color: #272822;
  padding: 1.5em 0;
  border-radius: 3px;
  color: #F8F8F2;
  text-shadow: 0 1px rgba(0, 0, 0, 0.3);
  font-family: Consolas, Monaco, 'Andale Mono', monospace;
}

.token-property {
  color: #F92672;
}

.token-function {
  color: #E6DB74;
}

.token-selector {
  color: #a6e22e;
}

var text = document.querySelector('h1'),
    slider = document.querySelector('input');

slider.addEventListener('input', function () {
  text.style.outlineWidth = this.value + 'px';
  document.querySelector('.width').textContent = this.value + 'px';
}, false);

var select = document.querySelector('#select');

select.addEventListener("change", function (e) {
  text.style.outlineStyle = e.target.value;  
  document.querySelector('.style').textContent = e.target.value;  
});