Re: Execute Custom JS on Infinite Scroll

A little while ago I read this thread - today that strange white gave me an idea. How cool would it be to have an STL viewer right in the forum?

So I got down to work and programmed a small snippet quick & dirty. Everything can be reached via custom codes in the ACP. No plugin required.

Preview & Demo

How does it work?

Your liked files will be automatically converted:

[My Model](https://example.com/assets/model.stl)

turns out with a little 3d cube attached. A click on this cube toggles the STL-Model preview.

Bildschirmfoto 2021-03-06 um 14.22.23.png

As showed in the preview video, the STL-Viewer is also available in the composer preview.

Bildschirmfoto 2021-03-06 um 14.24.18.png

Compatibility

This little snippet is also mobile responsive You can view the 3d models on mobile devices like a boss. Full responsive.

Code

Just at these snippets to custom HTML / CSS / Javascript via the ACP.

style.css

iframe.stl-model-viewer{
    min-width: 200px;
    max-width: 600px;
    width: 100%;

    min-height: 300px;
    max-height: 500px;
    height: 100%;

    border: 1px solid lightgray;
    border-radius: 10px;

    display: block;

    margin-bottom: 25px;
    margin-left: auto;
    margin-right: auto;


    -webkit-box-shadow: 0px 13px 29px -15px rgba(0,0,0,0.75);
    -moz-box-shadow: 0px 13px 29px -15px rgba(0,0,0,0.75);
    box-shadow: 0px 13px 29px -15px rgba(0,0,0,0.75);


}

javascript.js

var re = /(?:\.([^.]+))?$/;
// NO BACKSLASH AT THE END!
var base_url = "https://your-nodebb-url.com";

$(window).on('action:posts.loaded action:ajaxify.end action:composer.preview', function(data) {
    
    $('a').each(function(){
      var href = $(this).attr("href");
      var ext = re.exec(href)[1];
      
      if(ext == "stl"){
        var indicator = Math.floor(Math.random() * 1000000) + 1 
        var currentModelUrl = $(this);
        if (href.substring(0, 8) !== 'https://'){
            href = base_url + href;      
        }
        
        
        var alreadyLinked = $(this).closest('p').find('a#open-stl-model').attr('data-url');
        
        if(!alreadyLinked){
            $(' <a style="margin-left: 5px; cursor: pointer;" title="3D-Modell anzeigen" id="open-stl-model" data-url="' + href + '" related="' + indicator + '"><i class="fa fa-cube"></i></a>').insertAfter(currentModelUrl);
            $(' <div id="' + indicator + '" style="display: none;" data-url="' + href + '"><iframe class="stl-model-viewer" src="https://www.viewstl.com/?embedded&url=' + href + '&color=white&bgcolor=transparent&shading=flat&rotation=yes&clean=yes&noborder=yes&orientation=top&edges=no"></iframe></div>').insertAfter( $(this).closest("p") );
        }

        
        
      }
    });
    
    
    
});

$(window).on('action:ajaxify.end action:composer.preview', function(data) {
    
    $('a#open-stl-model').click(function(){
        var thisLink = $(this);
        var related = thisLink.attr("related");
        $('div#' + related).slideToggle();
    })
    
})

Before running:

Change the base url to fit your nodebb path:

// NO BACKSLASH AT THE END!
var base_url = "https://your-nodebb-url.com";

In case of https://community.nodebb.org/ it would be:

// NO BACKSLASH AT THE END!
var base_url = "https://community.nodebb.org";

It is used to convert local links e.g /assets/uploads/top_pla_3_holes.stl to public links: https://community.nodebb.org/assets/uploads/top_pla_3_holes.stl

Adjustments

You can take a look at viewstl.com/embed to adjust your model viewer inside of javascript.js.

$(' <div id="' + indicator + '" style="display: none;" data-url="' + href + '"><iframe class="stl-model-viewer" src="https://www.viewstl.com/?embedded&url=' + href + '&color=white&bgcolor=transparent&shading=flat&rotation=yes&clean=yes&noborder=yes&orientation=top&edges=no"></iframe></div>').insertAfter( $(this).closest("p") );

There are thinks like:

Shading
Rotation
Orientation
Model Color
Background Color

Limitations

The files which are linked in the topic have to be accessible by viewstl.com so private files wont work here I think.
Maybe you do have to enable cross site origin for viewstl.com as well.

This should be just a little playaround with some nodebb given features. As mentioned: it's a quick & dirty plugin which uses third party services. But there is also a standalone javascript plugin available: https://www.viewstl.com/plugin/ which you could use in a nodebb plugin.

See this topic more as a simple feature and as well as an inspiration for other plugins in this direction you could make.

Maybe its interesting for @Aleksei or someone else.

Thanks for reading.

Community

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