react 集成 markdown编辑器

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yarn add react-mde
yarn add showdown

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function _makeExpandingArea(el) {
    var timer = null;
    //由于ie8有溢出堆栈问题，故调整了这里
    var setStyle = function (el, auto) {
      if (auto) el.style.height = 'auto';
      el.style.height = el.scrollHeight + 'px';
    }
    var delayedResize = function (el) {
      if (timer) {
        clearTimeout(timer);
        timer = null;
      }
      timer = setTimeout(function () {
        setStyle(el)
      }, 200);
    }
    if (el.addEventListener) {
      el.addEventListener('input', function () {
        setStyle(el, 1);
      }, false);
      setStyle(el)
    } else if (el.attachEvent) {
      el.attachEvent('onpropertychange', function () {
        setStyle(el)
      })
      setStyle(el)
    }
    if (window.VBArray && window.addEventListener) { //IE9
      el.attachEvent("onkeydown", function () {
        var key = window.event.keyCode;
        if (key == 8 || key == 46) delayedResize(el);

      });
      el.attachEvent("oncut", function () {
        delayedResize(el);
      }); //处理粘贴
    }
  }


  React.useEffect(() => {
    //这里用了 jquery 来获取元素
    let dom = $('.mde-text:first')
    Debug(dom, 'mdEditor')
    console.log(dom)
    //注册事件  
    _makeExpandingArea(dom[0])
  }, [])