Question

我正在尝试更改v4.13 MaterialUI Outlined Input的边框颜色。但是，当尝试覆盖CSS时，我没有任何工作。

我已经尝试将多个CSS规则应用于每个元素，即select和OutlinedInput，以下两个是最新的。我在这里做什么错了？

const styles = () =>
  createStyles({
    select: {
      "&:before": {
        borderColor: "red"
      },
      "&:after": {
        borderColor: "red"
      },
    },
    outline: {
      "&:before": {
        borderColor: "red"
      },
      "&:after": {
        borderColor: "red"
      },
    }
  });

   <Select
      label={label}
      fullWidth={true}
      error={touched && invalid}
      className={inputStyles}
      classes={{ root: classes.select }}
      input={
        <OutlinedInput
          {...input}
          fullWidth={true}
          id={input.name}
          labelWidth={this.state.labelWidth}
          classes={{notchedOutline: classes.outline}}
        />
      }
      {...custom}
    >
      {children}
    </Select>

我可以在此处看到设置边框颜色的位置，但是无法覆盖它。

Answer 1

以下是显示如何执行此操作的示例：

import React from "react";
import { makeStyles } from "@material-ui/core/styles";
import OutlinedInput from "@material-ui/core/OutlinedInput";
import InputLabel from "@material-ui/core/InputLabel";
import MenuItem from "@material-ui/core/MenuItem";
import FormControl from "@material-ui/core/FormControl";
import Select from "@material-ui/core/Select";

const useStyles = makeStyles(theme => ({
  root: {
    display: "flex",
    flexWrap: "wrap"
  },
  formControl: {
    margin: theme.spacing(1),
    minWidth: 120
  },
  selectEmpty: {
    marginTop: theme.spacing(2)
  }
}));
const useOutlinedInputStyles = makeStyles(theme => ({
  root: {
    "& $notchedOutline": {
      borderColor: "red"
    },
    "&:hover $notchedOutline": {
      borderColor: "blue"
    },
    "&$focused $notchedOutline": {
      borderColor: "green"
    }
  },
  focused: {},
  notchedOutline: {}
}));

export default function SimpleSelect() {
  const classes = useStyles();
  const outlinedInputClasses = useOutlinedInputStyles();
  const [values, setValues] = React.useState({
    age: "",
  });

  const inputLabel = React.useRef(null);
  const [labelWidth, setLabelWidth] = React.useState(0);
  React.useEffect(() => {
    setLabelWidth(inputLabel.current.offsetWidth);
  }, []);

  function handleChange(event) {
    setValues(oldValues => ({
      ...oldValues,
      [event.target.name]: event.target.value
    }));
  }

  return (
    <form className={classes.root} autoComplete="off">
      <FormControl variant="outlined" className={classes.formControl}>
        <InputLabel ref={inputLabel} htmlFor="outlined-age-simple">
          Age
        </InputLabel>
        <Select
          value={values.age}
          onChange={handleChange}
          input={
            <OutlinedInput
              labelWidth={labelWidth}
              name="age"
              id="outlined-age-simple"
              classes={outlinedInputClasses}
            />
          }
        >
          <MenuItem value="">
            <em>None</em>
          </MenuItem>
          <MenuItem value={10}>Ten</MenuItem>
          <MenuItem value={20}>Twenty</MenuItem>
          <MenuItem value={30}>Thirty</MenuItem>
        </Select>
      </FormControl>
    </form>
  );
}

您可以在我的相关答案中了解更多相关信息：

无法更改Material-UI OutlinedInput的边框颜色

1 个答案: