js 获取字符串的图片路径并替换

```javascript
this.$api.appPlateForm('', 'index/goodsdetail', params, function(res) {
          if (res.code == 200) {
            let content = res.data.goods.content;
            let re = /<img [^>]*src=['"]([^'"]+)[^>]*>/gi;
            let srcReg = /src=[\'\"]?([^\'\"]*)[\'\"]?/i // 匹配图片中的src
            let reHttp = new RegExp("http");
            let imgArr = content.match(re);
            for (let i = 0; i < imgArr.length; i++) {
              let imgSrc = imgArr[i].match(srcReg);
              if (!reHttp.test(imgSrc[1])) {
                content = content.replaceAll(imgSrc[1], that.hostUrl+imgSrc[1]);
              }
            }
            that.goods_detail = content.replaceAll('<img', '<img style=max-width:100%')
          }