revision:
When present, it specifies that an <input> element should be pre-selected (checked) when the page loads.
The checked attribute can be used with <input type="checkbox"> and <input type="radio">.
The checked attribute can also be set after the page load, with a JavaScript.
<input type = "checkbox | radio" checked />
<input type = "checkbox | radio" checked="checked" />
The checked attribute indicates that the input element is checked, i.e. selected. Clicking the element will toggle, i.e. check or uncheck, the item.
<form style="margin-left:5vw;" ction="/action_page.php" method="get">
<input type="checkbox" name="vehicle1" value="Bike">
<label for="vehicle1"> I have a bike</label><br>
<input type="checkbox" name="vehicle2" value="Car">
<label for="vehicle2"> I have a car</label><br>
<input type="checkbox" name="vehicle3" value="Boat" checked>
<label for="vehicle3"> I have a boat</label><br><br>
<input type="submit" value="Submit">
</form>
codes:
<form style="margin-left:5vw;" action="#">
<label>Status</label><br />
<input type="radio" id="pending" name="status" value="Pending" checked>
<label for="pending">Pending</label><br />
<input type="radio" id="closed" name="status" value="Closed">
<label for="closed">Closed</label><br />
<input type="submit" value="Submit">