Here is a little tricks to implement a download button in the Discovery Explorer tool of Warp10.

download_file_discovery_explorer.mc2

// @endpoint https://sandbox.senx.io/api/v0/exec
// @preview discovery
// @theme dark


[ 'red' 'yellow' 'green' 'white' ] 'color' STORE
1 4 <% 
'i' STORE 
NEWGTS
1 30 <% 
    RAND + STU * NOW + NaN NaN NaN RAND ADDVALUE  
%> FOR
'data_' $i TOSTRING + RENAME
{ 'color' $color $i 1 - GET } SETATTRIBUTES WRAP
%> FOR STACKTOLIST 'data' STORE

{
   'title' 'My Download Dashboard'
   'cellHeight' 120
   'vars' {
        'data' $data
    }
   'tiles' [
       {
           'title' 'Download'
           'type' 'display'
           'options' { 'eventHandler' 'type=variable,tag=SomeData' }
           'x' 5 'y' 0 'w' 2 'h' 1
           'macro' <%

                <'
                    fileName = "data.json";
                    const jsonString = encodeURIComponent(JSON.stringify({{{jsonData}}}));
                    const dataUri = `data:application/json;charset=utf-8,${jsonString}`;
                    const a = document.createElement('a');
                    a.href = dataUri;
                    a.download = fileName;
                    document.body.appendChild(a);
                    a.click();
                    document.body.removeChild(a);

                            
                '>

                {
                    "jsonData" $data <% UNWRAP %> F LMAP ->JSON
                } TEMPLATE 

                'download_script_js' STORE
                

                <'

                    <button style='background-color: DodgerBlue;' onclick='{{download_script_js}}' >Download</button> 
   
                '>


                {
                    'download_script_js' $download_script_js
                } TEMPLATE 

                
           %>
       }
       {
           'title' 'Some Data'
           'type' 'line'
           'x' 0 'y' 1 'w' 12 'h' 4
           'macro' <%
                
                $data <% UNWRAP %> F LMAP 'data' STORE

                { 
                'data' $data 
                'params' [ 
                    { 'datasetColor' $data 0 GET ATTRIBUTES 'color' GET  'xAxis' 0 }
                    { 'datasetColor' $data 1 GET ATTRIBUTES 'color' GET 'xAxis' 0 }
                    { 'type' 'area' 'datasetColor' $data 2 GET ATTRIBUTES 'color' GET 'xAxis' 1 }
                    { 'datasetColor' $data 3 GET ATTRIBUTES 'color' GET 'xAxis' 0 }
                ]
                'events' [ { 'tags' 'SomeData' 'type' 'variable' 'selector' 'data' } ]
                }
           %>
       }
    ]
}