Public method vue picture shows, if the normal display picture, if not the default image

1.html

<img :src="imgShow(imgUrl)" />　

2.js

// display image, if the normal display picture, if not, the default image 
　data ()　　　　

     imgUrl:'',

mothods:

	imgShow:function(data){
    	     let reg = /^(https:|http:)/g;
    	     if(data){
    		if(reg.test(data)){
    			return data;
			}else{
				return 'http://192.168.0.176:8888/assets/img/item4.png';
			}
		}else{
    		        return 'http://192.168.0.176:8888/assets/img/404.png';
		}
	}