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JavaScript

Posted by Luis Magaña
Luis Magaña
13,042 Points

Dependent DropDown (Dealership Model)

I need some help expanding on this code that I found on css-tricks.com. This is a dependent dropdown that works for two select elements I want to expand it to work for three, the third being dependent on the second. I am not the best with Jquery and my original attempt was two recreate the same function just change the Id's inside the script to match new select elements. Any help with this is much appreciated. 

<select id="first-choice">
      <option selected value="base">Please Select</option>
      <option value="outdoorpatio">Outdoor Patio</option>
      <option value="grills">Grills</option>
    </select>
    <br>
    <select id="second-choice">
      <option>Please choose from above</option>
    </select>
    <br>
    <select id="third-choice">
      <option>Please choose from above</option>
    </select>

$("#first-choice").change(function() {

    var $dropdown = $(this);

    $.getJSON("jsondata/data.json", function(data) {

        var key = $dropdown.val();
        var vals = [];

        switch(key) {
            case 'outdoorpatio':
                vals = data.outdoorpatio.split(",");
                break;
            case 'grills':
                vals = data.grills.split(",");
                break;
            case 'base':
                vals = ['Please choose from above'];
        }

        var $secondChoice = $("#second-choice");
        $secondChoice.empty();
        $.each(vals, function(index, value) {
            $secondChoice.append("<option>" + value + "</option>");
        });
    });
});