Second Drop-down Options Based On First Drop-down

On a web page, if you select different options on the first drop-down, different options will appear in the second drop-down. Solution 1: You could try like this.First hide all the options and show only matching options using toggleClass()$(function() { $('#independent').on('change', function (e) { $('#dependent').val(''); var endingChar = $(this).val().split('').pop(); var selected = $( '#independent' ).val(); $('#dependent option').addClass('show'); $('#dependent option[value^='+selected+']').toggleClass('show'); }) });Copy.show{ display:none; }Copy<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><selectid="independent"><optionvalue="A"> A </option><optionvalue="B"> B </option></select><selectid="dependent"><optionvalue="A021"> A1 </option><optionvalue="A22019"> A2 </option><optionvalue="A3541"> A3 </option><optionvalue="B148"> B1 </option><optionvalue="B2"> B2 </option><optionvalue="B397415"> B3 </option></select>CopySolution 2: The following loops through the options. If the option's value doesn't start with the correct first letter, a class is added to hide via css. If it does match, the class is removed. It also selects the first option that matches the correct letter, so a hidden option isn't selected.$(function() { $('#independent').on('change', function (e) { var selected = $('#independent').val().toUpperCase(); var currentDep = $('#dependent').val().charAt(0).toUpperCase(); var changedSelected = false; $('#dependent option').each(function() { var opt = $(this); var value = opt.val().charAt(0).toUpperCase(); if (value !== selected) { opt.addClass('hide'); opt.removeAttr('selected'); } else { opt.removeClass('hide'); if (!changedSelected) { opt.attr('selected', 'selected'); changedSelected = true; } else { opt.removeAttr('selected'); } } }); }); });Copy.hide { display: none; }Copy<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><selectid="independent"><optionvalue="A"> A </option><optionvalue="B"> B </option></select><selectid="dependent"><optionvalue="A021"> A1 </option><optionvalue="A22019"> A2 </option><optionvalue="A3541"> A3 </option><optionvalue="B148"> B1 </option><optionvalue="B2"> B2 </option><optionvalue="B397415"> B3 </option></select>CopySolution 3: $(function() { $('#independent').on('change', function (e) { var selected = $('#independent').val().toUpperCase(); var currentDep = $('#dependent').val().charAt(0).toUpperCase(); var changedSelected = false; $('#dependent option').each(function() { var opt = $(this); var value = opt.val().charAt(0).toUpperCase(); if (value !== selected) { opt.addClass('hide'); opt.removeAttr('selected'); } else { opt.removeClass('hide'); if (!changedSelected) { opt.attr('selected', 'selected'); changedSelected = true; } else { opt.removeAttr('selected'); } } }); }); });Copy.hide { display: none; }Copy<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><selectid="independent"><optionvalue="A"> A </option><optionvalue="B"> B </option></select><selectid="dependent"><optionvalue="A021"> A1 </option><optionvalue="A22019"> A2 </option><optionvalue="A3541"> A3 </option><optionvalue="B148"> B1 </option><optionvalue="B2"> B2 </option><optionvalue="B397415"> B3 </option></select>Copy Share Post a Comment for "Second Drop-down Options Based On First Drop-down" Top Question Firefox, Chrome, Safari Have Grey Background For Mp4 Html5 Video Any video (that I can make) with a white background becomes… Red Border Still Appears On Inputs After Resetting An HTML 5 Form Firefox I have an HTML 5 form! Great, I'm excited! I decide to … Svg Animation And Firefox I'm struggle with SVG animation drawing, which is work … Form To Iframe Submission - How Do You Reset The Form After File Upload? I have a form that submits the results to an iframe. The su… How To Hide/show Tabs Using Jquery I have four tabs.On loading only the first tab is opened an… How To Save Html5 Geolocation Data To Python Django Admin? Is it possible to save the javascript html5 geolocation lat… How To Limit The Html Table Records In Each Page I am populating a table in my jsp which has more than 20 re… How To Display A Python String As Html In Jupyter Notebook In IPython notebook, I used to be able to display a python … How To Add Placeholder Field?

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