我对React还是很陌生,所以请原谅此问题中的任何错误!
我目前正在尝试使用基本的登录表单:
import React, { Component } from 'react';
import { Input, Form, Button } from 'semantic-ui-react'
class LoginForm extends Component {
state = { username: '', password: '' }
handleChange = (e, { name, value }) => this.setState({ [name]: value })
handleSignIn(e) {
e.preventDefault()
this.props.onSignIn(this.username, this.password)
}
render() {
const { username, password } = this.state
return (
<div className="login-container">
<Form onSubmit={this.handleSignIn.bind(this)}>
<Form.Field>
<Input icon="user" iconPosition="left" placeholder="Username" type="text" ref="username" onChange={this.handleChange}/>
</Form.Field>
<Form.Field>
<Input icon="user secret" iconPosition="left" placeholder="Password" type="password" ref="password" onChange={this.handleChange}/>
</Form.Field>
<Form.Field>
<Button type="submit" className="inputSpacing" color="yellow"><Icon name='lock' />Login</Button>
</Form.Field>
</Form>
</div>
);
}
}
export default LoginForm;
我面临的问题是state = { username: '', password: '' }
行会产生以下错误:
ERROR in ./react-client/src/components/coreComponents/loginForm.js
Module build failed: SyntaxError: D:/path/to/project/react-client/src/components/coreComponents/loginForm.js: Unexpected token (6:8)
我已经从here复制了此代码,但是即使那里的代码段也给了我这个错误。我想念什么? :(
答案 0 :(得分:2)
将其包含在构造函数中。另外,您还需要使用此关键字
将状态绑定到组件 constructor() {
super();
this.state = {
username: '', password: ''
};
}
答案 1 :(得分:2)
如类似的issue on github所述。您应该编辑您的 .babelrc 文件以使用此语法。
{
"presets": [
["es2016"],
"react"
],
"plugins": [
"babel-plugin-transform-class-properties"
]
}
答案 2 :(得分:1)
您没有creation_Date,Hour_of_day,log_count
2018-08-16,0,3278
2018-08-17,4,278
2018-08-18,10,6723
的{{1}}属性。
name