Wrong background-size for SVG-Background image in Firefox

Not the first time i ran into problems with SVGs preserveAspectRatio attribute, but i can’t remember a case where Firefox handled this different from Chrome. However, lets have look at the this weird behavoir.

The goal was to build a very flexible lines-background-element with CSS-Grid:

Chrome result without preserveAspectRatio=“false“ on the SVG-Wrapper

While Chrome renders everything perfectly fine, Firefox produced this:

Firefox result without preserveAspectRatio=“false“ on the SVG-Wrapper

The Code:


    <div class="line-bg line-bg--middle-center-to-bottom-right">
      <div class="line-bg__item line-bg__item--curve-tl"></div>
      <div class="line-bg__item line-bg__item--flex-h"></div>
      <div class="line-bg__item line-bg__item--flex-v"></div>


      --line-edge-group-size: 268px;
      --line-group-size: calc(var(--line-edge-group-size) * 0.5522);
      grid-template-columns: var(--line-edge-group-size) auto;
      grid-template-rows: var(--line-edge-group-size) auto;
      background-image: url('line_bg_v.svg');
      background-repeat: repeat-y;
      background-position:0 0;
      background-size: var(--line-group-size) auto;

SVG (the *wrong* code)

<?xml version="1.0" encoding="utf-8"?>
<svg viewBox="0 0 690 25" xmlns="http://www.w3.org/2000/svg">
  <g transform="matrix(1, 0, 0, 0.961538, 0, 0)">
    <path d="M676.115,-0L676.115,26L690.031,26L690.031,-0L676.115,-0ZM507.101,-0L507.101,26L521.018,26L521.018,-0L507.101,-0ZM338.083,-0L338.083,26L352.004,26L352.004,-0L338.083,-0ZM169.069,-0L169.069,26L182.986,26L182.986,-0L169.069,-0ZM13.916,-0L0,-0L0,26L13.916,26L13.916,-0Z" style="fill:#878787;fill-rule:nonzero;"/>

So after testing around, with the background-size, -position, etc. the conclusion was that the SVG itself must be the problem. And it kinda was, but i’im pretty sure its a Firefox Bug with SVG + background-size. As you can see in the code, i was not trying to change the aspect-ratio in any way, i just set a fixed with + auto height for the background and let em repeat verticaly, so the preserveAspectRatio shouldn’t needed here.

The Workaround

<?xml version="1.0" encoding="utf-8"?>
<svg viewBox="0 0 690 25" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none">
  <g transform="matrix(1, 0, 0, 0.961538, 0, 0)">
    <path d="M676.115,-0L676.115,26L690.031,26L690.031,-0L676.115,-0ZM507.101,-0L507.101,26L521.018,26L521.018,-0L507.101,-0ZM338.083,-0L338.083,26L352.004,26L352.004,-0L338.083,-0ZM169.069,-0L169.069,26L182.986,26L182.986,-0L169.069,-0ZM13.916,-0L0,-0L0,26L13.916,26L13.916,-0Z" style="fill:#878787;fill-rule:nonzero;"/>

Set preserveAspectRatio=“none“ on the SVG wrapper. Done.

    JTL Shop (5): (Cookie) Consent Manager

    Selbst eingebundene Videos via Consent Manager blockieren / freischalten

    Im Beispiel sind nur die für den Consent Manager nötigen Attribute definiert, für ein umfangreicheres Beispiel, kann man sich beispielsweise das Core Video OPC-Portlet ansehen (\includes\src\OPC\Portlets\Video\Video.tpl).

    <div class="embed-responsive embed-responsive-16by9">
        <iframe class="needs-consent youtube" data-src="https://www.youtube-nocookie.com/embed/VIDEOID"></iframe>
        <a href="#" class="trigger give-consent" data-consent="youtube">Youtube Consent geben</a>

    Das funktioniert so ohne weiteres Zutun, eine eigene Initialisierung o. Ä. ist nicht notwendig.



    document.addEventListener('consent.ready', function(e) {
        console.log('consent ready!');
    document.addEventListener('consent.updated', function(e) {
        console.log('consent updated!');

    Consent prüfen

    if (e.detail !== null && typeof e.detail.youtube !== 'undefined' && e.detail.youtube === true) {
        console.log('youtube consent given');

    Offizielle Doku (zum jetzigen Zeitpunkt nur für Plugins/PHP dokumentiert): https://jtl-devguide.readthedocs.io/projects/jtl-shop/de/latest/shop_privacy/consentmanager.html?highlight=cookie#jtl-shop-consent-manager

      JTL Shop (5): OnPage Composer (OPC)

      Because i had some pain when starting development with JTL Shops new OPC, I start to collect some stuff and things here to help others.

      Add new OPC-Mount Point / Region to the Template

      This is pretty simple, but i think it’s currently undocumented, just add this:

      {opcMountPoint id='opc_before_filter' inContainer=false}

      Perform emtpy check for OPC-Mount Points

      As of now, there seems to be no function to check if a OPC-Mount Point is empty. So we need to use Smarty instead:

      {* Add further OPC region *}
      {capture "opc_category_top"}
          {opcMountPoint id='opc_category_top'}
      {if $smarty.capture.opc_category_top|strip|replace:' ':'' != ""}
          <div class="result-wrapper-top">

      This is only required if have an extra wrapper surrounding the mount point.

      … more to come.

        Good ol‘ Font Awesome: Fork Awesome

        I’m not a big fan of Font Awesome 5, i’m sure it has an amazing feature set and stuff, but I’m completely fine with simple, working iconfonts.

        However, I just wanted to drop a link to project „Fork Aswesome“, a fork of Font Awesome 3 who keeps it updated. Fantastic!

        Migrate to a Dell Inspiron with Clonezilla (Windows 10)

        Migrating SOME notebook to a current Dell notebook (Inspiron from 2020 in this case) using Clonezilla has some pitfalls, so i decided to publish the procedre.

        Hint: After this you will not be able to (re)activate RAID in the BIOS, or lets say… doing this will result in boot problems you have to solve by yourself. I stick with AHCI.

        I will not go into detail how to create a Clonezilla bootstick, i just recommend my favorite tool to create those bootsticks under Windows: https://www.linuxliveusb.com.

        1. Create your disc clone / image / …

        Clone your old disc to an external USB drive using Clonezilla. I’ve cloned the whole dics instead of just the needed C: Partition, to have a full backup of the old notebook. So ..feel free to just clone the C: partition.

        2. Prepare the Target PC (your new Dell Notebook)

        You need to enter the BIOS by pressing the F2 key while booting. Now select „System Configuration“, search for „SATA Operation“ and switch from RAID to AHCI, otherwise – at the moment of writing this – Clonezilla is not able to enter the local drives.

        3. Clone

        Boot to the Clonezilla stick and choose to clone just the C: partition of the clone you’ve created in step 1.

        After this is done, you reboot the PC, some ..aggregating.. repair .. spinner screens will automaticaly show up. After this is done, Windows 10 will start as usal. No struggle with the bootloader or something (what will happen very likely if you override the whole disc).

        4. Download Dell Software and fix BIOS settings

        The touch pad doesn’t worked well for me after the migration. Simply use Windows Update, it will install some Dell apps. Start the „Dell Update“ App, it will automaticaly install all Drivers.

        An your’e done.

          JTL Shop (4): Eigene SMARTY Template Files in CMS Seiten laden

          Es gibt bedauerlicherweise kein Plugin um das zu erreichen (vom Alleskönner Dropper mal abgesehen), daher habe ich den Templatefile über das ID Feld der CMS Seite geladen und lasse einen Fehler ausgeben wenn die Datei nicht existiert:

          {extends file="../../Evo/layout/index.tpl"}
          {block name="content"}   
              {if !empty($Link->cIdentifier) && ($Link->cIdentifier|substr:0:11 eq "custom-tpl-")}
                  <!-- load custom tpl: {$Link->cIdentifier}.tpl -->
                  {assign var="custom_tpl_file_path" value="__custom-cms-tpl/{$Link->cIdentifier}.tpl"}
                  {if file_exists("SERVERPFAD_ZUM_TEMPLATE/{$custom_tpl_file_path}")}
                      {include file=$custom_tpl_file_path}
                      <div class="alert alert-danger">
                          Datei: "{$custom_tpl_file_path}" nicht gefunden.

          Das ganze in der layout/index.tpl im Bereich von H1 + cContent der CMS Seiten einfügen und natürlich den Serverpfad zum template ersetzen.

            CSS (fake) placeholder text for select elements

            For now, there is no placeholder attribute available for HTML select elements what is really bad if you need to achive some kinda reduced form styling, without field labels and stuff.

            HTML Select element with fake placeholder
            Example form with placeholder style select label

            But there is a workaround, we have to add the label as the first option with a value=““. Now we want to style it like the other placeholder texts. To do so we need just a little JS & CSS:

                  var $placeholderSelects = $('form select');
                  $placeholderSelects.on('change', function(){

            The JS ensures that we just have the placeholder style / color, if the first value is selected. (Yes, i better should put this in a function …)

                color: $input-placeholder-color;
                > option:not(:first-child){
                  color: $input-color;

              Safari transform z-index bug workaround

              If you have trouble with your z-index using the transform property, you should try to set transform: translate3d(0,0,0) translateZ(1000px) on the element what should overlay the other element(s).

              But be careful, this fucks up all your z-indexes, you have to add translateZ(xxxx) to all elements who should overlay your overlaying element. If you have some position: fixed elements inside your overlaying element, they will fail as well (you must move it outside any container on which you have applied the translateZ property).


              // (Animated) element behind the page
                transform: perspective(200px) rotateX(26deg);
                animation: whatever 1s;
                // ...
              // Page wrapper in front of the element
                // The part that should work in all major browsers - except safari:
                // The Safari fix:
                transform: translate3d(0,0,0) translateZ(1000px);

              Android TV: Google Play Filme spielt (einige) Videos nicht mehr ab (Nvidia Shield)

              Seit geraumer Zeit konnte ich einige Videos nicht mehr abspielen, der Abspielversuch wurde – abhängig vom Film – mit der Meldung „Es ist ein Fehler aufgetreten“ quittiert. Gleiches beim Abspielen von Trailern.

              Der Versuch das Problem per Chromecast zu umgehen schlug ebenfall mit der Meldung „Die Wiedergabe wird auf diesem Gerät nicht unterstützt. (Fehlercode: 119)“ fehl.

              Die Lösung ist denkbar einfach: Öffnet die Einstellungen eures Android TV Geräts und sucht den Punkt „Apps“, bei Nvidia Shield auf erster Ebene der Einstellungen im Bereich „Allgemeine Einstellungen“ zu finden. Hier wählt hier nun „Google Play Filme & Serien“ und löscht zuerst den Cache. Ich habe direkt alles durchgezogen, daher kann ich nicht abschließend sagen was nun geholfen hat: Cache geleert, Daten gelöscht, Deaktiviert und wieder aktiviert.

              Anschließend ließ sich – bis auf einen einzelnen Film („Suborbicon“) – alles wieder abspielen.

                JTL Shop 4 EVO Template – Kundenpasswörter Maximallänge anpassen

                Aus Gründen beschränkt JTLs EVO Template die Maximallänge von Kundenpasswörtern leider hart im Template.

                Ich will an der Stelle nicht beurteilen warum so ein niedriger Wert angesetzt wurde, sehe jegliche Passwort Restriktionen (welche nicht zur erhöhten Sicherheit beitragen) aber als extrem kontraproduktiv an.

                Die Maximallänge kann in der register/form/customer_account.tpl angepasst werden – im eigenen Sub Theme, nicht im EVO versteht sich. Der Wert muss für beide Passwortfelder angepasst werden, Attribut „maxlength“.