Discord-History-Tracker/src/renderer/scr.template.js

var TEMPLATE_REGEX = /{([^{}]+?)}/g;

class TEMPLATE{
  constructor(contents){
    this.contents = contents;
  };

  apply(obj, processor){
    return this.contents.replace(TEMPLATE_REGEX, (full, match) => {
      var value = match.split(".").reduce((o, property) => o[property], obj);
      
      if (processor){
        var updated = processor(match, value);
        return typeof updated === "undefined" ? DOM.escapeHTML(value) : updated;
      }
      
      return DOM.escapeHTML(value);
    });
  }
}