关于html5:富文本内容里的图片放在h5适应大于边框的宽度300的宽度适应其余不变样式取消掉

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if(richContent != null){
        let index = 0 //width= 第一次呈现的地位
        let index2 = 0 // 宽度值结尾下标
        let str = ” // 截图 width=  之后的内容
        let widths = 0
        let img = ”
        if(richContent.indexOf(/<img¹*>/gi) >= 0){
          richContent= richContent.replace(/<img¹*>/gi,function(match,capture){
            img = JSON.parse(JSON.stringify(match))
            index = img.indexOf(‘width=’)
            str = img.substring(index+6,img.length)
            index2 = str.indexOf(‘”‘,1)
            widths=str.substring(1,index2)
            if(widths>300){
              match = match.replace(/style=”²+”/gi, ”).replace(/style=’³+’/gi, ”);
              match = match.replace(/width=”²+”/gi, ”).replace(/width=’³+’/gi, ”);
              match = match.replace(/height=”²+”/gi, ”).replace(/height=’³+’/gi, ”);
              return match;
            }else{
              return match;
            }
          });
          if(widths>300){
            richContent = richContent.replace(/style=”²+”/gi,function(match,capture){
              match = match.replace(/width:⁴+;/gi, ‘max-width:100%;’).replace(/width:⁴+;/gi, ‘max-width:100%;’);
              return match;
            });
            richContent = richContent.replace(/<br¹*/>/gi, ”);
            richContent = richContent.replace(/\<img/gi, ‘<img style=”max-width:100%;margin:0 auto;display:inline-block”‘);
          }else{
            return match;
          }
        }
        this.richContent = richContent;
      }else{
        this.richContent = ”
      }