Search field does not show alert if empty

SOLVED!
It was enough to add “required”

searchform.php

<form role="search" method="get" class="search-form" action="<?php echo esc_url( home_url( '/' ) ); ?>">
  <label>
    <span class="screen-reader-text"><?php echo esc_html_x( 'Search for:', 'label', 'donovan' ); ?></span>
    <input type="search" class="search-field"
    placeholder="<?php echo esc_attr_x( 'Search &hellip;', 'placeholder', 'donovan' ); ?>"
    value="<?php echo get_search_query(); ?>" name="s" required
    title="<?php echo esc_attr_x( 'Search for:', 'label', 'donovan' ); ?>" />
</label>
   <button type="submit" class="search-submit">
   <?php echo donovan_get_svg( 'search' ); ?>
   <span class="screen-reader-text"><?php echo esc_html_x( 'Search', 'submit button', 'donovan' ); ?></span>
   </button>
</form>

• This reply was modified 2 years, 10 months ago by steve92.