控制富文本中图片大小

过滤函数

formatRichText(html) { //控制小程序中图片大小
    let newContent = html.replace(/<img[^>]*>/gi, function(match, capture) {
      match = match.replace(/style="[^"]+"/gi, '').replace(/style='[^']+'/gi, '');
      match = match.replace(/width="[^"]+"/gi, '').replace(/width='[^']+'/gi, '');
      match = match.replace(/height="[^"]+"/gi, '').replace(/height='[^']+'/gi, '');
      return match;
    });
    newContent = newContent.replace(/style="[^"]+"/gi, function(match, capture) {
      match = match.replace(/width:[^;]+;/gi, 'max-width:100%;').replace(/width:[^;]+;/gi,
        'max-width:100%;');
      return match;
    });
    newContent = newContent.replace(/<br[^>]*\/>/gi, '');
    newContent = newContent.replace(/\<h2/gi, '<h2 class="p46"');
    newContent = newContent.replace(/\<img/gi,
      '<img style="max-width:100%;height:auto;display:inline-block;margin:10rpx auto;"');
    return newContent;
  },

vue、uniapp示例

<view class="p34">
    <rich-text class="d" :nodes="obj.con|formatRichText"></rich-text>
</view>

filters: {
      /**
       * 处理富文本里的图片宽度自适应
       * 1.去掉img标签里的style、width、height属性
       * 2.img标签添加style属性：max-width:100%;height:auto
       * 3.修改所有style里的width属性为max-width:100%
       * 4.去掉<br/>标签
       * @param html
       * @returns {void|string|*}
       */
      formatRichText(html) { //控制小程序中图片大小
          let newContent = html.replace(/<img[^>]*>/gi, function(match, capture) {
              match = match.replace(/style="[^"]+"/gi, '').replace(/style='[^']+'/gi, '');
              match = match.replace(/width="[^"]+"/gi, '').replace(/width='[^']+'/gi, '');
              match = match.replace(/height="[^"]+"/gi, '').replace(/height='[^']+'/gi, '');
              return match;
          });
          newContent = newContent.replace(/style="[^"]+"/gi, function(match, capture) {
              match = match.replace(/width:[^;]+;/gi, 'max-width:100%;').replace(/width:[^;]+;/gi,
                  'max-width:100%;');
              return match;
          });
          newContent = newContent.replace(/<br[^>]*\/>/gi, '');
          newContent = newContent.replace(/\<h2/gi, '<h2 class="p46"');
          newContent = newContent.replace(/\<img/gi,
              '<img style="max-width:100%;height:auto;display:inline-block;margin:10rpx auto;"');
          return newContent;
      }
  }