JSFiddle - React, Tailwind, and code Playground

HTML

<select id="hikashop_product_characteristic_1" name="hikashop_product_characteristic[1]" class="inputbox" size="1" onchange="return hikashopUpdateVariant(this);">
	<option value="2" selected="selected">Twin</option>
	<option value="6">Full</option>
	<option value="7">Queen</option>
	<option value="8">King</option>
	<option value="9">Cal King</option>
</select>
<select id="hikashop_product_option_1" name="hikashop_product_option[1]" class="inputbox" size="1"  onchange="hikashopChangeOption();">
	<option value="0" selected="selected">No</option>
	<option value="775"> Twin ( + 
	
	$39.99 
 )</option>
	<option value="774"> Twin Heavy Duty ( + 
	
	$49.99 
 )</option>
	<option value="769"> Twin Heavy Duty Glideamatic ( + 
	
	$59.99 
 )</option>
	<option value="772"> Twin XL ( + 
	
	$39.99 
 )</option>
	<option value="771"> Twin XL Heavy Duty ( + 
	
	$49.99 
 )</option>
	<option value="770"> Twin XL Heavy Duty Glideamatic ( + 
	
	$59.99 
 )</option>
	<option value="776"> Full ( + 
	
	$39.99 
 )</option>
	<option value="777"> Full Heavy Duty ( + 
	
	$49.99 
 )</option>
	<option value="778"> Full Heavy Duty Glideamatic ( + 
	
	$59.99 
 )</option>
	<option value="773"> Queen ( + 
	
	$49.99 
 )</option>
	<option value="779"> Queen Heavy Duty ( + 
	
	$59.99 
 )</option>
	<option value="780"> Queen Heavy Duty Glideamatic ( + 
	
	$99.99 
 )</option>
	<option value="781"> King ( + 
	
	$59.99 
 )</option>
	<option value="782"> King Heavy Duty ( + 
	
	$69.99 
 )</option>
	<option value="783"> King Heavy Duty Glideamatic ( + 
	
	$99.99 
 )</option>
	<option value="784"> Cal King ( + 
	
	$59.99 
 )</option>
	<option value="785"> Cal King Heavy Duty ( + 
	
	$69.99 
 )</option>
	<option value="786"> Cal King Heavy Duty Glideamatic ( + 
	
	$99.99 
 )</option>
</select>

JavaScript

var subselectContains = {
      "Twin": [0,775,774,769], //Twin
        "Twin XL": [0,772,771,770], //Twin XL
        "Full": [0,776,777,778], //Full
		"Queen": [0,773,779,780], //Queen
		"King": [0,781,782,783], //King
		"Cal King": [0,784,785,786] //Cal King
};

var productcharacteristics = $("#hikashop_product_characteristic_1");
var solutionOptions = $("#hikashop_product_option_1 option");


productcharacteristics.change(function () {
    var visibleOptions = subselectContains[this.options[this.selectedIndex].textContent];

    if (visibleOptions.length != 0) {
        solutionOptions.hide();


        solutionOptions.each(function () {
            for (var i = 0; i <= visibleOptions.length; i++) {
                if (this.value == visibleOptions[i]) {
                    $(this).show();
                }
            }
        });
    } else {
        solutionOptions.show();
    }
});