html checkbox status

1<!--
2  You can also group multiple checkboxes by giving them the same "name".
3  When posted to PHP, all the checked boxes' values will appear in the
4  $_POST array under an index with the same name as your checkboxes.
5
6  E.g. if we check "bananas" and "apples" below and post the form then
7  our $_POST array will look something like this:
8  ['fruit' => ['bananas', 'apples']]
9-->
10<form>
11  <label>
12    <span>Bananas</span>
13    <input type="checkbox" name="fruit[]" value="bananas">
14  </label>
15  
16  <label>
17    <span>Apples</span>
18    <input type="checkbox" name="fruit[]" value="apples">
19  </label>
20  
21  <label>
22    <span>Grapes</span>
23    <input type="checkbox" name="fruit[]" value="grapes">
24  </label>
25  
26  <button type="submit">Submit</button>
27</form>

1app.innerHTML = '<h1>Hello, world!</h1>';
2