spee.ch/views/partials/publishForm-Channel.handlebars

<div class="row">
    <div class="column column--3">
        <label class="label" for="channel-name-select">Channel:</label>
    </div><div class="column column--7">
        <div id="input-error-channel-select" class="info-message info-message--failure"></div>
        <select type="text" id="channel-name-select" class="select select--primary select--arrow" value="channel" onchange="toggleChannel(event)">
        <optgroup>
            {{#if user}}
                <option value="{{user.channelName}}" >@{{user.userName}}</option>
            {{/if}}
            <option value="none" >None</option>
        </optgroup>
        <optgroup>
            <option value="login">Login</option>
            <option value="new" >New</option>
        </optgroup>
        </select>
    </div>
</div>

<div id="channel-login-details" class="row row--short" hidden="true">
    {{> channelLoginForm}}
</div>

<div  id="channel-create-details" class="row row--short" hidden="true">
    {{> channelCreationForm}}
</div>

<script src="/assets/js/authFunctions.js"></script>
<script type="text/javascript">
    function toggleChannel (event) {
         const createChannelTool = document.getElementById('channel-create-details');
         const loginToChannelTool = document.getElementById('channel-login-details');
         const selectedOption = event.target.selectedOptions[0].value;
         const urlChannel = document.getElementById('url-channel');
         console.log('toggle event triggered');
         if (selectedOption === 'new') {
             // show/hide the login and new channel forms
             createChannelTool.hidden = false;
             loginToChannelTool.hidden = true;
             // update URL
             urlChannel.innerText = '';
         } else if (selectedOption === 'login') {
             // show/hide the login and new channel forms
             loginToChannelTool.hidden = false;
             createChannelTool.hidden = true;
             // update URL
             urlChannel.innerText = '';
         } else {
             // hide the login and new channel forms
             loginToChannelTool.hidden = true;
             createChannelTool.hidden = true;
             hideError(document.getElementById('input-error-channel-select'));
             // update URL
             if (selectedOption === 'none'){
                 console.log('selected option: none');
                 urlChannel.innerText = '';
             } else {
                 console.log('selected option:', selectedOption);
                 // retrieve short url from db
                 urlChannel.innerText = `{{user.channelName}}:{{user.shortChannelId}}/`;
             }
         }
    }
</script>