粘贴到我的电子邮件后,我无法弄清为什么在文本框中复制它。在React Component的文本框中复制文本的粘贴
看来,当我粘贴,它正确地触发handleEmailPaste
,但我也注意到,handleEmailPaste
也得到由过去那么不知道为什么触发。我猜粘贴是一种变化,所以在文本中粘贴可能会触发这两种功能。 如果我注释掉handleEmailInput
中的代码并粘贴一个值,它不会重复它。
我想我不知道处理这个问题的正确方法。对我来说似乎我确实需要两个独立的处理程序。请注意,我使用的是引导和控制它,我已经有了的onChange和onPaste集:
<FormControl
bsSize="small"
className="ft-username"
componentClass="input"
onPaste={this.props.handleEmailPaste}
onChange={this.props.handleEmailInput}
placeholder="Enter email"
style={{ width: 300}}
type="email"
value={this.props.email}
/>
LoginContainer
import { connect } from 'react-redux'
import React, { Component } from 'react'
const zxcvbn = require('zxcvbn'),
_ = require('lodash')
import * as AsyncActions from '../actions/Auth/AuthAsyncActions'
import Login from '../components/Login/Login'
class LoginContainer extends Component {
constructor(props) {
super(props)
this.state = {
email: '',
password: '',
errorMessage: '',
emailValidationState: null,
formIsValid: false,
formValidationState: null,
passwordValidationState: null,
passwordIsValid: null
}
this.handleEmailPaste = this.handleEmailPaste.bind(this)
this.handleEmailInput = this.handleEmailInput.bind(this)
this.handlePasswordInput = this.handlePasswordInput.bind(this)
this.handleLoginPressed = this.handleLoginPressed.bind(this)
this.resetFields = this.resetFields.bind(this)
this.validateForm = this.validateForm.bind(this)
this.validateEmail = this.validateEmail.bind(this)
this.validatePassword = this.validatePassword.bind(this)
}
handlePasswordInput(e) {
const password = e.target.value
this.setState({ password: password})
this.validatePassword()
}
handleEmailPaste(e){
console.log(`handleEmailPaste: ${e.clipboardData.getData('Text')}`)
const value = e.clipboardData.getData('Text')
this.setState({ email: value })
this.validateEmail(value)
}
handleEmailInput(e) {
this.setState({ email: e.target.value })
this.validateEmail()
}
async handleLoginPressed(e) {
e.preventDefault()
this.validateForm()
await this.props.authenticate(this.state.email, this.state.password)
if(this.props.isAuthenticated) {
this.props.history.push('/dashboard')
return
}
if(!this.props.isAuthenticated){
this.setState({
formValidationState: 'error',
errorMessage: this.state.formIsValid &&
'Your password and/or email is not associated with an active user'
})
if(this.state.email && this.state.password){this.resetFields()}
}
}
validateForm(){
this.validateEmail()
this.validatePassword()
this.setState({
formIsValid: (this.state.emailValidationState === 'success'
&& this.state.passwordValidationState === 'success')})
}
validatePassword(){
const password = zxcvbn(this.state.password)
if(password.score >=0){
this.setState({
passwordValidationState: 'error',
passwordHelpText: password.feedback.suggestions})
return
}
this.setState({
passwordValidationState: 'success',
passwordHelpText: null })
}
validateEmail(value){
if((!_.isEmpty(value)) || !_.isEmpty(this.state.email)) {
this.setState({
emailValidationState: 'success',
emailError: ''
})
return
}
this.setState({
emailValidationState: 'error',
emailError: 'please enter an email address'
})
}
resetFields(){
this.setState({
email: '',
emailError: '',
emailValidationState: null,
password: '',
passwordHelpText: '',
passwordValidationState: null })
}
render(){
return(
<div>
<Login
email={this.state.email}
emailError={this.state.emailError}
emailValidationState={this.state.emailValidationState}
errorMessage={this.state.errorMessage}
formValidationState={this.state.formValidationState}
handleEmailInput={this.handleEmailInput}
handleEmailPaste={this.handleEmailPaste}
handlePasswordInput={this.handlePasswordInput}
login={this.handleLoginPressed}
password={this.state.password}
passwordHelpText={this.state.passwordHelpText}
passwordValidationState={this.state.passwordValidationState}
/>
</div>
)
}
}
const mapStateToProps = state => ({
isAuthenticating: state.auth.isAuthenticating,
isAuthenticated: state.auth.isAuthenticated,
token: state.auth.token
})
export const mapDispatchToProps = {
authenticate: AsyncActions.authenticate
}
export { Login }
export default connect(mapStateToProps, mapDispatchToProps)(LoginContainer)
登录
import React, {Component} from 'react'
import LoginForm from './LoginForm'
export default class Login extends Component {
render(){
return (
<div>
<LoginForm
email={this.props.email}
emailError={this.props.emailError}
emailValidationState={this.props.emailValidationState}
errorMessage={this.props.errorMessage}
formValidationState={this.props.formValidationState}
handleEmailInput={this.props.handleEmailInput}
handleEmailPaste={this.props.handleEmailPaste}
handlePasswordInput={this.props.handlePasswordInput}
login={this.props.login}
password={this.props.password}
passwordHelpText={this.props.passwordHelpText}
passwordValidationState={this.props.passwordValidationState}
/>
</div>
)
}
}
LoginForm
import React, { Component } from 'react'
import {
Button,
ControlLabel,
HelpBlock,
FormControl,
FormGroup,
PageHeader } from 'react-bootstrap'
export default class LoginForm extends Component {
render(){
return (
<div className='ft-login-form'>
<PageHeader className='ft-header'><small>Login</small></PageHeader>
<form onSubmit={this.props.login}>
<FormGroup validationState={this.props.formValidationState}>
<ControlLabel className="ft-form-error-message">{this.props.errorMessage}</ControlLabel>
</FormGroup>
<FormGroup controlId="formBasicText" validationState={this.props.emailValidationState}>
<ControlLabel>Email</ControlLabel>
<FormControl
bsSize="small"
className="ft-username"
componentClass="input"
onPaste={this.props.handleEmailPaste}
onChange={this.props.handleEmailInput}
placeholder="Enter email"
style={{ width: 300}}
type="email"
value={this.props.email}
/>
<HelpBlock className="ft-email-error">{this.props.emailError}</HelpBlock>
</FormGroup>
<FormGroup validationState={this.props.passwordValidationState}>
<ControlLabel>Password</ControlLabel>
<FormControl
bsSize="small"
className="ft-password"
componentClass="input"
onPaste={this.props.handleEmailPaste}
onChange={this.props.handlePasswordInput}
placeholder="Enter password"
style={{ width: 300}}
type="password"
value={this.props.password}
/>
<HelpBlock className="ft-password-help-text">{this.props.passwordHelpText}</HelpBlock>
</FormGroup>
<Button
className='ft-login-button'
type='submit'
>Login</Button>
</form>
</div>)
}
}
UPDATE
所以我加入这一点,这样可以解决问题:基本上这里
handleEmailInput(e) {
if(!this.state.email) {
this.setState({email: e.target.value})
}
this.validateEmail()
}
我说,嘿,如果有人在最初粘贴它,它将击中handleEmailPaste
这setState的电子邮件,所以如果是这样的话(我知道handleEmailInput也将由该粘贴/更改触发),那么我不想再设置状态,如果handleEmailPaste已经设置它。相反,如果用户输入值而不是粘贴它,那么这个if语句将是bypassed
,因此handleEmailInput would setState in that case
。
但我的整个电子邮件输入处理只是对我感到羞耻。如果你认为这是一个黑客,并有更好的重构这个代码的想法让我知道。
更新#2
废话,我注意到,我没有得到复制,但现在我不能输入Email地址框中输入新值,它不会让我和它只是坐在那里与填充电子邮件,但我不能修改它。
更新#3 (咆哮:凭啥不计算器使身体后textarea的更大的高度,我几乎看不到什么,我这里正在做的,当我滚动)
所以真的,我的问题不再是它复制粘贴文本的问题。我回到了原来的问题,我原来的问题是我能够粘贴一些东西,但它使输入无效,我无法弄清楚原因。我想我应该更新这篇文章的标题,但哦。
无论如何,我已经诉诸于只使用onChange
并摆脱onPaste。没有更多的dups发生
所以问题:是与最初的行为,当你第一次粘贴到电子邮件文本框的值。我看到的行为(以下是没有onPaste更新的代码了)当你在第一时间的值粘贴:
- 当你在第一时间贴,它击中我
handleEmailInput()
方法。 handleEmailInput
调用setState({email: e.target.value})
所以你会认为现在是设置this.state.email- 但当
handleEmailInput
电话validateEmail()
后,validateEmail
,它会检查this.state.email
和它的仍然""
出于某种原因。所以它因此结果达到第二个setState,它将其设置为无效。
不会在第一次调用到this.setState({email: e.target.value })
设置this.state.email
到粘贴的电子邮件?我知道,当我把一个断点上线,e.target.value
确实有我粘贴的电子邮件,但后this.setState({email: e.target.value })
完成调用,出于某种原因在validateEmail(时),它仍然得到""
为this.state.email我不明白为什么。也许这是React及其生命周期的基础?或者我还没有意识到的其他一些基本问题......不确定。
LoginContainer (我已经完全去除onPaste逻辑)
import { connect } from 'react-redux'
import React, { Component } from 'react'
const zxcvbn = require('zxcvbn'),
_ = require('lodash')
import * as AsyncActions from '../actions/Auth/AuthAsyncActions'
import Login from '../components/Login/Login'
class LoginContainer extends Component {
constructor(props) {
super(props)
this.state = {
email: '',
password: '',
errorMessage: '',
emailValidationState: null,
formIsValid: false,
formValidationState: null,
passwordValidationState: null,
passwordIsValid: null
}
this.handleEmailInput = this.handleEmailInput.bind(this)
this.handlePasswordInput = this.handlePasswordInput.bind(this)
this.handleLoginPressed = this.handleLoginPressed.bind(this)
this.resetFields = this.resetFields.bind(this)
this.validateForm = this.validateForm.bind(this)
this.validateEmail = this.validateEmail.bind(this)
this.validatePassword = this.validatePassword.bind(this)
}
handlePasswordInput(e) {
const password = e.target.value
this.setState({ password: password})
this.validatePassword()
}
handleEmailInput(e) {
this.setState({email: e.target.value })
this.validateEmail()
}
async handleLoginPressed(e) {
e.preventDefault()
this.validateForm()
await this.props.authenticate(this.state.email, this.state.password)
if(this.props.isAuthenticated) {
this.props.history.push('/dashboard')
return
}
if(!this.props.isAuthenticated){
this.setState({
formValidationState: 'error',
errorMessage: this.state.formIsValid &&
'Your password and/or email is not associated with an active user'
})
if(this.state.email && this.state.password){this.resetFields()}
}
}
validateForm(){
this.validateEmail()
this.validatePassword()
this.setState({
formIsValid: (this.state.emailValidationState === 'success'
&& this.state.passwordValidationState === 'success')})
}
validatePassword(){
const password = zxcvbn(this.state.password)
if(password.score >=0){
this.setState({
passwordValidationState: 'error',
passwordHelpText: password.feedback.suggestions})
return
}
this.setState({
passwordValidationState: 'success',
passwordHelpText: null })
}
validateEmail(){
if(!_.isEmpty(this.state.email)) {
this.setState({
emailValidationState: 'success',
emailError: ''
})
return
}
this.setState({
emailValidationState: 'error',
emailError: 'please enter an email address'
})
}
resetFields(){
this.setState({
email: '',
emailError: '',
emailValidationState: null,
password: '',
passwordHelpText: '',
passwordValidationState: null })
}
render(){
return(
<div>
<Login
email={this.state.email}
emailError={this.state.emailError}
emailValidationState={this.state.emailValidationState}
errorMessage={this.state.errorMessage}
formValidationState={this.state.formValidationState}
handleEmailInput={this.handleEmailInput}
handlePasswordInput={this.handlePasswordInput}
login={this.handleLoginPressed}
password={this.state.password}
passwordHelpText={this.state.passwordHelpText}
passwordValidationState={this.state.passwordValidationState}
/>
</div>
)
}
}
const mapStateToProps = state => ({
isAuthenticating: state.auth.isAuthenticating,
isAuthenticated: state.auth.isAuthenticated,
token: state.auth.token
})
export const mapDispatchToProps = {
authenticate: AsyncActions.authenticate
}
export { Login }
export default connect(mapStateToProps, mapDispatchToProps)(LoginContainer)
import React, { Component } from 'react'
import {
Button,
ControlLabel,
HelpBlock,
FormControl,
FormGroup,
PageHeader } from 'react-bootstrap'
LoginForm的 (注意我们使出回只具有的onChange电子邮件)
export default class LoginForm extends Component {
render(){
return (
<div className='ft-login-form'>
<PageHeader className='ft-header'><small>Login</small></PageHeader>
<form onSubmit={this.props.login}>
<FormGroup validationState={this.props.formValidationState}>
<ControlLabel className="ft-form-error-message">{this.props.errorMessage}</ControlLabel>
</FormGroup>
<FormGroup controlId="formBasicText" validationState={this.props.emailValidationState}>
<ControlLabel>Email</ControlLabel>
<FormControl
bsSize="small"
className="ft-username"
componentClass="input"
onChange={this.props.handleEmailInput}
placeholder="Enter email"
style={{ width: 300}}
type="email"
value={this.props.email}
/>
<HelpBlock className="ft-email-error">{this.props.emailError}</HelpBlock>
</FormGroup>
<FormGroup validationState={this.props.passwordValidationState}>
<ControlLabel>Password</ControlLabel>
<FormControl
bsSize="small"
className="ft-password"
componentClass="input"
onPaste={() => this.props.handleEmailPaste}
onChange={() => this.props.handlePasswordInput}
placeholder="Enter password"
style={{ width: 300}}
type="password"
value={this.props.password}
/>
<HelpBlock className="ft-password-help-text">{this.props.passwordHelpText}</HelpBlock>
</FormGroup>
<Button
className='ft-login-button'
type='submit'
>Login</Button>
</form>
</div>)
}
}
你不能修改它,因为你的'email'是一个[受控组件](https://facebook.github.io/react/docs/forms.html#controlled-components),它的值取决于'state',其中,因为'如果',不更新 –
好..如果我拿出如果,然后它复制该框中的值 – PositiveGuy
是啊我卡住了然后如果是这样的话,因为我不知道如何摆脱原来的问题,那么如果是这样的话,而我粘贴在一封电子邮件,它dups它(不知何故它更新状态两次或什么,我不知道) – PositiveGuy