17.
Add the correct boolean attribute to specify that an <input> tag must automatically get focus when the page loads:
<input placeholder="Enter username" __________>
readonly
checked
required
autofocus
Correct: D
To specify that an <input> tag must automatically get focus when the page loads, you should add the autofocus boolean attribute. This attribute does not require a value and is simply added to the <input> tag. When the page is loaded, the cursor will automatically be placed in this input field, making it convenient for the user to start typing without needing to manually select the field.