请问这种写法 如何更加完美 更加精简

Question

let_suffix=res.fileExt||res.fileExt.substring(1);
console.log(res.fileExt.substring(1))
if(_suffix=='jpeg'||_suffix=='jpg'||_suffix=='png'||_suffix=='bmp'||_suffix=='gif'){
alert(1);
this.fileDetail.iFileType='img'
}elseif(_suffix=='mov'||_suffix=='avi'||_suffix=='rm'||_suffix=='rmvb'||_suffix=='mpeg'||_suffix=='mpg'){
this.fileDetail.iFileType='video'
}else{
this.fileDetail.iFileType='none'
}

Answer 1

『Javascript策略模式』const_suffix=res.fileExt||res.fileExt.substring(1)constimg='img'constvideo='video'constmapping={jpeg:img,jpg:img,png:img,bmp:img,gif:img,mov:video,avi:video,rm:video,rmvb:video,mpeg:video,mpg:video,}this.fileDetail.iFileType=mapping[_suffix]||'none'

Answer 2

我抛个砖，应该可以竖过来写吧：let_suffix=res.fileExt||res.fileExt.substring(1);console.log(res.fileExt.substring(1))switch(_suffix){case'jpeg':case'jpg':case'png':case'bmp':case'gif':alert(1);this.fileDetail.iFileType='img'break;case'mov':case'avi':case'rm':case'rmvb':case'mpeg':case'mpg':this.fileDetail.iFileType='video'break;default:this.fileDetail.iFileType='none'}不过仅仅是照顾下小屏码农，离“完美”还比较远……所以大家请轻拍~