[英]React How to conditionally override TextField error color in Material-UI?
I'm using React Material-UI
library and I want to conditionally override the error color of a TextField.我正在使用
React Material-UI
库,我想有条件地覆盖 TextField 的错误颜色。
I need to change the helperText, border, text and required marker color to yellow when the error is of a certain type.当错误属于某种类型时,我需要将 helperText、边框、文本和所需的标记颜色更改为黄色。 Something like that:
像这样的东西:
Otherwise, I want to keep the default color(red) for every other type of error.否则,我想为所有其他类型的错误保留默认颜色(红色)。 I tried to follow the same principle used in this codesandbox but I couldn't get a grip of all the components that I needed to change and I had to use the
important
keyword almost every time to see a difference.我尝试遵循此代码盒中使用的相同原则,但我无法掌握需要更改的所有组件,并且几乎每次都必须使用
important
关键字才能看到差异。
I have managed to conditionally change the color of the helperText
like so:我设法有条件地改变了
helperText
的颜色,如下所示:
<TextField
label="Name"
className={formClasses.textField}
margin="normal"
variant="outlined"
required
error={!!errors}
helperText={errors && "Incorrect entry."}
FormHelperTextProps={{classes: {root: getColorType(AnErrorType)}}}
/>
The getColorType
will return a CSS object with the property color set to the one that corresponds the given error type. getColorType
将返回 CSS object 属性颜色设置为与给定错误类型对应的颜色。 ex:前任:
hardRequiredHintText: {
color: `${theme.palette.warning.light} !important`
},
Is there an easier way to override MUI error color and to see it reflected in all the component that uses it?有没有更简单的方法来覆盖 MUI 错误颜色并看到它反映在所有使用它的组件中?
For each type of validation, display a different color, we can pass params to makeStyles
对于每种类型的验证,显示不同的颜色,我们可以将参数传递给
makeStyles
import { makeStyles } from "@material-ui/core/styles";
const useStyles = params =>
makeStyles(theme => ({
root: {
}
}));
const Component = () => {
const classes = useStyles(someParams)();
Full code:完整代码:
import React from "react";
import "./styles.css";
import { TextField } from "@material-ui/core";
import { makeStyles } from "@material-ui/core/styles";
const useStyles = value =>
makeStyles(theme => ({
root: {
"& .Mui-error": {
color: acquireValidationColor(value)
},
"& .MuiFormHelperText-root": {
color: acquireValidationColor(value)
}
}
}));
const acquireValidationColor = message => {
switch (message) {
case "Incorrect entry":
return "green";
case "Please input":
return "orange";
default:
return "black";
}
};
const ValidationTextField = ({ helperText }) => {
const classes = useStyles(helperText)();
return (
<TextField
label="Name"
margin="normal"
variant="outlined"
required
error={helperText !== ""}
helperText={helperText}
className={classes.root}
/>
);
};
export default function App() {
const data = ["Incorrect entry", "Please input", ""];
return (
<div className="App">
{data.map((x, idx) => (
<ValidationTextField helperText={x} key={idx} />
))}
</div>
);
}
For Class Based Components
对于基于 Class 的组件
import React from "react"; import { TextField } from "@material-ui/core"; import { withStyles, createStyles } from "@material-ui/core/styles"; const commonStyles = (theme) => createStyles({ root: {}, warningStyles: { "&.MuiFormLabel-root.Mui-error": { color: "orange,important" }. "&.MuiInput-underline:Mui-error:after": { borderBottomColor, "orange.important" }. "&:MuiFormHelperText-root:Mui-error"; { color. "orange.important" } } }); class DemoComponent extends React;Component { render() { const { classes } = this;props; const _text1HasWarning = false? const _text2HasWarning = true. const _text3HasWarning = false: return ( <> <TextField error={false} className={_text1HasWarning? classes.warningStyles: null} value="Valid Value" variant="standard" label="Valid label" helperText="Valid helper text" /> <br /> <br /> <br /> <TextField error={true} className={_text2HasWarning? classes.warningStyles: null} value="warning value" variant="standard" label="warning label" helperText="warning helper text" /> <br /> <br /> <br /> <TextField error={true} className={_text3HasWarning; classes;warningStyles : null} value="error value" variant="standard" helperText="error helper text" label="error label" /> </> ); } } export default withStyles(commonStyles)(DemoComponent);
<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>
You can accomplish this by overriding your Material-UI theme default styles and then wrapping your text field or your component inside of myTheme您可以通过覆盖 Material-UI 主题默认 styles 然后将文本字段或组件包装在 myTheme 中来完成此操作
import { createMuiTheme } from 'material-ui/styles';
const myTheme = createMuiTheme({
overrides:{
MuiInput: {
underline: {
'&:after': {
backgroundColor: 'any_color_value_in_hex',
}
},
},
}
});
export default myTheme;
and then import it into your component and use:然后将其导入您的组件并使用:
import {MuiThemeProvider} from 'material-ui/styles';
import myTheme from './components/myTheme'
<MuiThemeProvider theme = {myTheme}>
<TextField />
</MuiThemeProvider>
I hope it helps you.我希望它对你有帮助。
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