这些错误阻止我的 nodejs 应用程序加载

Question

我在呈现页面时遇到这些错误。我的项目基于 NodeJs + React。

我正在使用这些版本。反应版本：^16.5 反应圆顶：^16.5 @material-ui/core：^4.9.1 @material-ui/icons : ^4.9.1"

第一个错误：

Tooltip.js:479 Uncaught TypeError: Cannot read property 'className' of undefined
at Tooltip (Tooltip.js:479)
at renderWithHooks (react-dom.development.js:14803)
at updateForwardRef (react-dom.development.js:16816)
at beginWork (react-dom.development.js:18645)
at HTMLUnknownElement.callCallback (react-dom.development.js:188)
at Object.invokeGuardedCallbackDev (react-dom.development.js:237)
at invokeGuardedCallback (react-dom.development.js:292)
at beginWork (react-dom.development.js:23203)
at performUnitOfWork (react-dom.development.js:22157)
at workLoopSync (react-dom.development.js:22130)

第二个错误：

The above error occurred in the <ForwardRef(Tooltip)> component:
in ForwardRef(Tooltip) (created by WithStyles(ForwardRef(Tooltip)))
in WithStyles(ForwardRef(Tooltip)) (created by Block)
in div (created by Block)
in Block (created by BlockAnimation)
in div (created by PoseElement)
in PoseElement (created by Context.Consumer)
in Unknown (created by BlockAnimation)
in Transition (created by PoseGroup)
in PoseGroup (created by BlockAnimation)
in div (created by BlockAnimation)
in BlockAnimation (created by Route)
in Route (created by withRouter(BlockAnimation))
in withRouter(BlockAnimation) (created by Navigation)
in div (created by Navigation)
in div (created by Navigation)
in div (created by ForwardRef(Toolbar))
in ForwardRef(Toolbar) (created by WithStyles(ForwardRef(Toolbar)))
in WithStyles(ForwardRef(Toolbar)) (created by Navigation)
in header (created by ForwardRef(Paper))
in ForwardRef(Paper) (created by WithStyles(ForwardRef(Paper)))
in WithStyles(ForwardRef(Paper)) (created by ForwardRef(AppBar))
in ForwardRef(AppBar) (created by WithStyles(ForwardRef(AppBar)))
in WithStyles(ForwardRef(AppBar)) (created by Navigation)
in div (created by Navigation)
in Navigation (created by Connect(Navigation))
in Connect(Navigation) (created by Route)
in Route (created by withRouter(Connect(Navigation)))
in withRouter(Connect(Navigation)) (created by ReduxWrapper)
in div (created by ReduxWrapper)
in ReduxWrapper (created by Connect(ReduxWrapper))
in Connect(ReduxWrapper) (created by Root)
in div (created by Root)
in Root (created by Route)
in Route
in div
in Router (created by ConnectedRouter)
in ConnectedRouter
in Provider
in AppContainer

我不明白这是什么意思。

Errors are thrown into this page.

像这样使用工具提示：

    import React, { Component } from 'react';
    import Tooltip from '@material-ui/core/Tooltip';
    import styles from './styles.css';
    
    class Block extends Component
    {
            state = {tooltipOpen:false};
    
        open = () => {
            this.setState({
                tooltipOpen: true
            });
        }
    
        close = () => {
            this.setState({
                tooltipOpen: false
            });
        }
    
        render ()
        {
            const {
                state: { tooltipOpen },
                props:{num}
            } = this;
            return (
                <div>
                    <div id={`block${num}`} className={`${styles['bar']} d-inline-flex`} onClick={(i)=>this.props.onClick({num})}></div>
                    <Tooltip title={`block${num}`} placement="bottom" open={tooltipOpen} onOpen={this.open}
                        onClose={this.close}
                        enterDelay={250}>
                        {`Block: ${num}`}
                    </Tooltip>
                </div>
            );
        }
    }
    
    export default Block;

Answer 1

在 material-ui github https://github.com/mui-org/material-ui/issues/18119

上查看此问题

你用的是material-ui的Tooltip，他的child一定是一个元素，当你用的时候：{`Block: ${num}`}是错误的。尝试使用它，像这样：<span>{`Block: ${num}`}</ span>

它必须是一个元素，所以 material-ui 可以从它向前传递引用。如果您查看 theis 文档，您会发现它必须是一个元素 https://material-ui.com/pt/api/tooltip/

这些错误阻止我的 nodejs 应用程序加载

These errors are preventing my nodejs app from loading

javascript

node.js

reactjs

react-dom

react-tooltip