   </div>

    <div class=example>
      <div class=example-title>Keys</div>
      <div id=keys></div>
    </div>

    <div class=example>
      <div class=example-title>BMI Calculator</div>
      <div id=bmi-calculator></div>
    </div>

    <div class=example>
      <div class=example-title>Form validation</div>
      <div id=form-validation></div>
    </div>

    <div class=example>
      <div class=example-title>Self-reference</div>
      <div id=self-reference></div>
    </div>

    <div class=example>