微信小程序实现富文本图片宽度自适应的方法

<view class='html_detail'>
  <rich-text nodes='{{artical}}'></rich-text>
</view>

data={artical:''}

async onLoad(){
  const json = await api.getDetail();
  if(json !== null){
    this.artical = util.formatRichText(json.detail.description);
  }
}

function formatRichText(html){
  let newContent= html.replace(/\<img/gi, '<img style="max-width:100%;height:auto;display:block;"');
  return newContent;
}

module.exports = {
  formatRichText
}

/**
 * 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|*}
 */
function formatRichText(html){
  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(/\<img/gi, '<img style="max-width:100%;height:auto;display:block;margin-top:0;margin-bottom:0;"');
  return newContent;
}

module.exports = {
  formatRichText
}