text: const makeMap = ( attrStr, expectsLowerCase ) => {
    const attrs = attrStr.split( ',' )
    const map = Object.create( null )
    attrs.forEach( t => map[t] = true )
    return expectsLowerCase ?
      val => map[val.toLowerCase()] :
      val => map[val]
  }
  
  // 参考https://github.com/vuejs/vue/blob/v2.6.10/src/platforms/web/server/util.js
  const isAttr = makeMap(
    'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,'
    + 'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,'
    + 'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,'
    + 'name,contenteditable,contextmenu,controls,coords,data,datetime,default,'
    + 'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,'
    + 'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,'
    + 'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,'
    + 'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,'
    + 'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,'
    + 'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,'
    + 'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,'
    + 'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,'
    + 'target,title,type,usemap,value,width,wrap'
  )
  
  function vModel ( self, dataObject, value ) {
    // dataObject.props.value = value
    dataObject.on.input = val => {
      self.$emit( 'input', val )
    }
    // 因为有些组件的v-model绑定的事件是change 所以这里也得监听
    dataObject.on.change = val => {
      self.$emit( 'input', val )
    }
  }
  
  const componentChild = {
    'el-input': {
      prepend ( h, conf, key ) {
        return <template slot="prepend">{conf[key]}</template>
      },
      append ( h, conf, key ) {
        return <template slot="append">{conf[key]}</template>
      }
    },
    'el-select': {
      options ( h, conf, key ) {
        const list = []
        conf.options.forEach( item => {
          list.push( <el-option label={item.label} value={item.value} disabled={item.disabled}></el-option> )
        } )
        return list
      }
    },
    'el-radio-group': {
      options ( h, conf, key ) {
        const list = []
        conf.options.forEach( item => {
          if ( conf.optionType === 'button' ) list.push( <el-radio-button label={item.value}>{item.label}</el-radio-button> )
          else list.push( <el-radio label={item.value} border={conf.border}>{item.label}</el-radio> )
        } )
        return list
      }
    },
    'el-checkbox-group': {
      options ( h, conf, key ) {
        const list = []
        conf.options.forEach( item => {
          if ( conf.optionType === 'button' ) {
            list.push( <el-checkbox-button label={item.value}>{item.label}</el-checkbox-button> )
          } else {
            list.push( <el-checkbox label={item.value} border={conf.border}>{item.label}</el-checkbox> )
          }
        } )
        return list
      }
    },
    'el-upload': {
      'list-type': ( h, conf, key ) => {
        const list = []
        if ( conf['list-type'] === 'picture-card' ) {
          list.push( <i class="el-icon-plus"></i> )
        } else {
          list.push( <el-button size="small" type="primary" icon="el-icon-upload">{conf.buttonText}</el-button> )
        }
        if ( conf.showTip ) {
          list.push( <div slot="tip" class="el-upload__tip">只能上传不超过 {conf.fileSize}{conf.sizeUnit} 的{conf.accept}文件</div> )
        }
        return list
      }
    }
  }
  
  export default {
    render ( h ) {
      const confClone = JSON.parse( JSON.stringify( this.conf ) )
      const dataObject = {
        attrs: {},
        props: {
          formData: this.formData,
          value: this.value || confClone['defaultValue']
        },
        on: {},
        style: {}
      }
      const children = []
  
      const childObjs = componentChild[confClone.tag]
      if ( childObjs ) {
        Object.keys( childObjs ).forEach( key => {
          const childFunc = childObjs[key]
          if ( confClone[key] ) {
            children.push( childFunc( h, confClone, key ) )
          }
        } )
      }
  
      Object.keys( confClone ).forEach( key => {
        const val = confClone[key]
        if ( key === 'vModel' ) {
          vModel( this, dataObject, this.value || confClone['defaultValue'] )
        } else if ( dataObject[key] ) {
          dataObject[key] = val
        } else if ( !isAttr( key ) ) {
          dataObject.props[key] = val
        } else {
          dataObject.attrs[key] = val
        }
      } )
      return h( this.conf.tag, dataObject, children )
    },
    props: ['conf', 'value', 'formData']
  }