IT技术 - validateDOMNesting(...): <button> 不能作为 <button> 的后代出现 - 吾爱随笔录

我Material-UI在我的项目中使用，我在控制台中收到警告：

Warning: validateDOMNesting(...): <button> cannot appear as a descendant of <button>

即使没有直系后代，

<form>
  <TextField
    label="Title"
    value={title}
    onChange={this.handleChange("title")}
    className={classes.formControl}
    margin="normal"
  />
  <br />
  <FormControl className={classes.formControl}>
    <InputLabel>Muscles</InputLabel>
    <Select
      value={muscles}
      onChange={this.handleChange("muscles")}
    >
      {categories.map((category, index) => {
        return (
          <MenuItem key="index" value={category}>
            {category}
          </MenuItem>
        );
      })}
    </Select>
  </FormControl>
  <br />
  <TextField
    multiline
    rows={4}
    label="Description"
    value={description}
    onChange={this.handleChange("description")}
    className={classes.formControl}
    margin="normal"
  />
</form>

这是沙盒链接：

https://codesandbox.io/s/react-material-ui-0yqeo