Template preview generator ignores statements and thus moves content around.

[InfGame]

When building a template, with for example multiple header images that get turned on and off through a value, it will ignore any kind of statement and show every element inside the template thus moving content to the right and sometimes out of view.

[Bago]

Please read https://github.com/voidlabs/mosaico/blob/master/CONTRIBUTING.md and provide more details as I don't understand what's the issue and how to reproduce it.

[InfGame]

I will attach some Pictures later to give an example. I just need to edit a template without our client's information.

But Basically i have a template that has multiple headers in a block that looks like this:

<table data-ko-block="logoBlock" align="center" border="0" cellpadding="0" cellspacing="0" class="vb-outer" style="padding-top: 30px; padding-bottom: 20px; width: 460px;">
  <tr>
    <td valign="middle">
      <table style="border-collapse: collapse;" align="right">
        <tr>
          <!--[if (gte mso 9)]>
                <table style="">
                    <tr>
                        <td style=" max-height:82px; max-width:460px;" valign="top">
                <![endif]-->
          <td valign="top" style="width: 460px;" data-ko-display="logo eq 'head1'">
            <img style="max-width: 460px; display: block; -ko-attr-alt: @image.alt;" src="header_1.png" align="center" alt="" border="0" hspace="0"
              width="460" height="82" data-ko-placeholder-height="82" />
          </td>
          <td valign="top" style="width: 460px;" data-ko-display="logo eq 'head2'">
            <img style="max-width: 460px; display: block; -ko-attr-alt: @image.alt;" src="header_2.png" align="center" alt="" border="0" hspace="0"
              width="460" height="82"  data-ko-placeholder-height="82" />
          </td>
          <td valign="top" style="width: 460px;" data-ko-display="logo eq 'head3'">
            <img style="max-width: 460px; display: block; -ko-attr-alt: @image.alt;" src="header_3.png" align="center" alt="" border="0" hspace="0"
              width="460" height="82" data-ko-placeholder-height="82" />
          </td>
          <td valign="top" style="width: 460px;" data-ko-display="logo eq 'flex'">
            <img  data-ko-editable="image.src" style="max-width: 966px; display: block; -ko-attr-alt: @image.alt;" src="flex_header.jpg" align="center" alt="" border="0" hspace="0"
              width="460" height="82" data-ko-placeholder-height="82" />
          </td>
          <!--
                   -->
              <!--[if (gte mso 9)]>
                </td>
                </tr>
                </table>
                <![endif]-->
        </tr>
      </table>
    </td>
  </tr>
</table>
<!-- /logoBlock -->

the problem that i encounter is that the generator for the preview immages seems to be ignoring the "data-ko-display" statements to hide the headers and shows them all at once.
This in turn pushes all the content of all the other blocks to the right and off screen making them appear empty in the preview.

[Bago]

I'm sorry I can't answer if you don't give me step by step details to see the issue.

Are you talking about the "makeThumbs" task Mosaico included years ago?

What code are you using? What command are you running?

I'm not yet sure what's your issue, maybe you simply forgot to put some "display:none" around:

https://github.com/voidlabs/mosaico/wiki/Template-language#data-ko-attributes

data-ko-display="condition" => the element and children are displayed only when condition is true. When you use this attribute for a "hidden by default" element, then add a style="display: none" to your element, so that the preview of the html will match your default version. Mosaico will remove the display none when interpreting this attribute.

[InfGame]

ah sorry, yes i am talking about he "makeThumbs" task.
we have not yet tried the "display: none".

[Bago]

Well, I removed makeThumbs from this project 5 years ago.

I consider makeThumbs a custom script used in the versafix-template project:
https://github.com/voidlabs/versafix-template/tree/master/src

It is not a "supported" way to automatically generate thumbnails for any templates: we saw template author most times generate their block thumbnails manually and often they prefer to use custom abstract images instead of real "thumbnails".

I'll close this bug as it doesn't apply to mosaico library.

Please use https://github.com/voidlabs/mosaico/discussions if you want to discuss the use of that task with mosaico.
Maybe in future we'll factor out template tooling from https://github.com/voidlabs/versafix-template to a "mosaico-template-tooling" project so to make it reusable by other custom templates.