Check out example codes for "html form elements". It will help you in understanding the concepts better.

Code Example 1

<input>
<label>
<select>
<textarea>
<button>
<fieldset>
<legend>
<datalist>
<output>
<option>
<optgroup>

Code Example 2

<!-- O segundo valor estará selecionado inicialmente -->
<select name="select">
  <option value="valor1">Valor 1</option> 
  <option value="valor2" selected>Valor 2</option>
  <option value="valor3">Valor 3</option>
</select>

Learn ReactJs, React Native from akashmittal.com