// 处理富文本图片
function formatRichText(html) { //控制小程序中图片大小
let newContent = html.replace(/<img[^>]*>/gi, function (match, capture) {
console.log(match.search(/style=/gi));

if (match.search(/style=/gi) == -1) {
  match = match.replace(/\<img/gi, '<img style=""');
}
return match;

});

newContent = newContent.replace(/style="/gi, '$& max-width:100% !important; ');
newContent = newContent.replace(/<br[^>]*/>/gi, '');
return newContent;
}