How to manually validate and display an error in the form through js?

Question

JavaScript

How to manually validate and display an error in the form through js?
Here is an example: It does not display any errors. Perhaps it is intended for other purposes, but I need the same thing that happens when sending and, if possible, for one field. How?
$('#w0').yiiActiveForm('validate');

Answer 1

$('#w0').yiiActiveForm('validateAttribute', 'attribute-name');