code: function $$safeEvalFn(str) {
      let keyStr = '';
  
      // Perform any parsing that needs to be performed on the scope value
      for (let key in this) {
          let val = this[ key ];
          if (!val && val !== 0 && val !== '') {
              continue;
          } else if (
              typeof val === 'symbol' ||
              typeof val === 'string'
          ) {
              val = `"${val}"`;
          } else if (typeof val === 'object') {
              val = JSON.stringify(val);
          }
  
          // I don't like having to use var here
          keyStr += `var ${key}=${val};`;
      }
  
      // Literal eval is executed in its own context here to reduce security issues
      /* eslint-disable */
      return eval([ keyStr, str ].join(''));
  
      /* eslint-enable */
  }
docs: A private function to evaluate the parsed template string in the context of `scope`