Templater replaces the entire content of the note!

[seliro]

What I’m trying to do

i want this code to add to a template i already have, but whenever i run the script it replaces the entire template. i would like to have the output added to the note, not replaced to it.
can someone help?

code:

<%*
   let series = tp.file.title;
   let show = series.toLowerCase();
   show = show.replace(/^the /,'');            //remove leading The
   show = show.replace(/^a /,'');              //remove leading A
   show = show.replace(/^an /,'');             //remove leading An
   show = show.replace(/\s+/g,'');             //remove spaces
   show = show.replace(/[^\p{L}\p{N}]/gu, ''); //remove punctuation

   tR = `# ${series}\n\n`;

   const apiRoot = 'https://epguides.frecar.no/show/';
   const cmd = `PowerShell -Command "(Invoke-WebRequest -Uri '${apiRoot}${show}/').Content"`;
   const { promisify } = require('util');
   const exec = promisify(require('child_process').exec);
   const result = await exec(cmd);
   const json = result.stdout.trim();

   if ((json.length < 10) || json.startsWith('{"error":'))
   {
      tR += 'Failed to find the episode list\n';
      tR += '```\n' + cmd + '\n```\n';
   }
   else
   {
      let eps = JSON.parse(json);
      let seasons = Object.keys(eps);
      for (let i = 0; i < seasons.length; i++)
      {
         let season = seasons[i];
         tR += `## Season ${season}\n`;

         let j = 0;
         let widthNum = 1;
         let widthTitle = 5;
         for (j = 0; j < eps[season].length; j++)
         {
            let num = `${eps[season][j].number}`;
            if (num.length > widthNum) { widthNum = num.length; }
            if (eps[season][j].title.length > widthTitle) { widthTitle = eps[season][j].title.length; }
         }

         tR += `| ${'#'.padStart(widthNum,' ')} | ${"Title".padEnd(widthTitle,' ')} | ${' Released '} |\n`;
         tR += `|-${'-'.padStart(widthNum,'-')}:|-${'-'.padEnd(widthTitle,'-')}-|------------|\n`;

         for (let j = 0; j < eps[season].length; j++)
         {
            let num = `${eps[season][j].number}`;
            tR += `| ${num.padStart(widthNum,' ')} | ${eps[season][j].title.padEnd(widthTitle,' ')} | ${eps[season][j].release_date} |\n`;
         }
         tR += '\n';
      }
   }

-%> 

[mr_abomination]

Right below your first block, you forgot the + part of +=

tR = `# ${series}\n\n`; → tR += `# ${series}\n\n`;