小编Gre*_*uko的帖子

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>

<FormControl className={classes.formControl}>
      <InputLabel id="demo-controlled-open-select-label" > Filter classes by day</InputLabel>
     
      <Select
        labelId="demo-controlled-open-select-label"
        id="demo-controlled-open-select"
        open={open}
        onClose={handleClose}
        onOpen={handleOpen}
          defaultValue={subjectFilter}
          onChange={handleChangeSubject}
        className="styleSelect"

        >
         {item.SUBJECT === 'OPEN_LEARNING' && 
               <ul className ="stylingList">
               {(state.subjects) && state.subjects.filter(item => 
               (item.SUBJECT === 'OPEN_LEARNING')).map(item => 
                 <li className ="stList">
                   {item.CLASS_FULL}
                 </li>
                 )}
                 </ul>
              }
            </MenuItem>
            //this is just one day.  I do this for all the days.
          ) )
        }
     
        </Select>
      </FormControl> …