Namespaces and input ID selector issue.

namespaceInputIDIssue.php

<?php

// Attribute id:
frontend\models\UserRegisterForm_profile:availabilityDate

// jQuery selector before escaping:
#frontend\models\UserRegisterForm_profile:availabilityDate

// jQuery selector after escaping using the snippet below:
frontend\\\\models\\\\UserRegisterForm_profile\\:availabilityDate

$selector = '#' . WhHtml::getOption('id', $this->htmlOptions, $this->getId());
$selector = str_replace('\\', str_repeat('\\', 4), $selector);
$selector = preg_replace("/([!\"%\$'\(\)\*\+,\.\/:;<=>\?@\[\]\^\{|\}~]+)/", '\\\\\\\$1', $selector);