Wordpress jQuery cookie example

functions.php

function custom_main_scripts() {

  // Enqueue plugin here, if needed, including  array('jquery') as the 3rd argument as a dependency (see below)

  // Enqueue custom javascript file
  wp_register_script( 'my-scripts', get_stylesheet_directory_uri() . '/myfile.js', array('jquery'), filemtime( get_template_directory() . '/myfile.js' ), true );

}
add_action( 'wp_enqueue_scripts', 'custom_main_scripts' );

myfile.js

( function( $ ) {

    $(document).ready( function() {

      if (!!$.cookie('textfield1')) {
          
        // existing cookie found - get cookie
        
        $(".textfield1").val( $.cookie("textfield1") );

      } else {
      
        // no cookie found - set cookie
        
        $(".textfield1").change(function() {
            $.cookie("textfield1", $(".textfield1").val(), {expires: 7});
        });

      }
    });
    
} )( jQuery );