如何从非捕获组中获取所有不匹配的文本部分

var s = 'This is a sample {{if:val2}}abc{{fi}} injection{{while:val3}} {{endwhile}} string {{for:val}}repeated text{{endfor}} asdb lasdfk {{do}} basdf {{dowhile:val4}} asldf lkjasdf lajsdf aljsdf lkjasdf lasdf.';
var rx = /{{(?:(?:for|if|while):\w+|do|endwhile)}}|{{(?:fi|endfor|dowhile:\w+)}}/;
console.log(
   s.split(rx)
)
// Getting rid of blank items and trim:
console.log(
   s.split(rx)
      .filter(function (x) { return x.trim() != ""; })
      .map(function (x) { return x.trim(); })
)